Tag Archives: stepper gear motor

China factory 110mm Flange Desboer ND110V Series Ratioc16-100 Stepper Motor High Precision Speed Reducer Low Backlash Spur Gear Planetary Gearbox planetary gearbox application

Product Description

Product Description

The ND110V series planetary gearboxes are designed and machined as a single unit with special tapered roller bearings to provide high radial load, high torque, ultra-precision, and small size. The ND series uses in highly rigid industries such as fiber optic laser equipment, floor track equipment, robot seventh axis, Parallel robots (spider hand) machine tools, and rotating arms.
Product Name: High Precision Planetary Reducer
Product Series: ND110V Series
Product features: high torque, high load, ultra-precision, small size
Product Description:
Integrated design concept with high-strength bearings ensure the product itself is durable and efficient
A variety of output ideas such as shaft output, flange and gear are available.
1 arc minute ≤ backlash ≤ 3 arc minutes
Reduction ratios ranging from 3 to 100
Frame design: increases torque and optimizes power transmission
Optimised selection of oil seals: reduces friction and laminate transmission efficiency
Protection class IP65
Warranty: 2 years

Our Advantages

High torque
High load
ultra-precision
Small size

Detailed Photos

 

Product Parameters

Segment number Double segment
Ratio i 16 20 25 35 40 50 70 100
Rated output torque Nm 250 250 310 280 250 310 280 210
Emergency stop torque Nm Three times of Maximum Output Torque
Rated input speed Rpm 4000
Max input speed Rpm 8000
Ultraprecise backlash arcmin ≤3
Precision backlash arcmin ≤5
Standard backlash arcmin ≤7
Torsional rigidity Nm/arcmin 82
Max.bending moment Nm 430
Max.axial force N 4070
Service life hr 30000(15000 under continuous operation)
Efficiency % ≥94%
Weight kg 7.3
Operating Temperature ºC -10ºC~+90ºC
Lubrication   Synthetic grease
Protection class   IP64
Mounting Position   All directions
Noise level(N1=3000rpm,non-loaded) dB(A) ≤63
Rotary inertia Kg·cm² 0.47 0.44

Applicable Industries

 

                              Packaging   Machinery                              Mechanical  Hand                                                         Textile  Machinery

                   Non  Standard  automation                                          Machine  Tool                                                       Printing   Equipment

Certifications

 

 

Company Profile

 

DESBOER (HangZhou) Transmission Technology Co., Ltd. is a subsidiary of DESBOER (China), which is committed to the design, development, customized production and sales of high precision planetary reducer as 1 of the technology company. Our company has over 10 years of design, production and sales experience, the main products are the high precision planetary reducer, gear, rack, etc., with high quality, short delivery period, high cost performance and other advantages to better serve the demand of global customers. It is worth noting that we remove the intermediate link sale from the factory directly to customers, so that you can get the most ideal price and also get our best quality service simultaneously.

 

About Research

In order to strengthen the advantages of products in the international market, the head company in Kyoto, Japan to established KABUSHIKIKAISYA KYOEKI, mainly engaged in the development of DESBOER high precision planetary reducer, high precision of transmission components such as the development work, to provide the most advanced design technology and the most high-quality products for the international market.

 

 

 

Application: Motor, Machinery, Marine, Agricultural Machinery, CNC Machine
Function: Change Drive Torque, Speed Changing, Speed Reduction
Layout: Plantery Type
Hardness: Hardened Tooth Surface
Installation: All Directions
Step: Double-Step
Customization:
Available

|

Customized Request

planetarygearbox

Planetary Gearbox Basics

If you’re in the market for a new Planetary Gearbox, you’ve come to the right place. There’s more to these mechanical wonders than just their name. Learn about Spur gears, helical gears, and various sizes. After you’ve read this article, you’ll know exactly what to look for when shopping for a new one. And you’ll also be able to avoid common mistakes made by amateur mechanics.

Wheel drive planetary gearboxes

Planetary gearboxes have numerous benefits over conventional gearboxes. Their compact design is advantageous for servo functions. Their lubrication is a key feature to maintain smooth operation and avoid damage to the gears. Some manufactures use CZPT to ensure proper functioning. These gearboxes have nearly three times the torque of traditional gearboxes while remaining compact and low in mass.
The planetary gears are made of three different types. Each type has an input and output shaft. The input and output shafts are usually coaxially arranged. The input and output shafts are connected to each other via a carrier. The carrier rotates with the planetary gears. The sun gear is the input gear and is typically 24 teeth in diameter. The outer gears are connected to the sun gear via rings of gears that are mounted around the sun gear.
Planetary gearboxes are also used in wheeled and tracked vehicles. They are also used in winch systems, which lift and lower loads. Typical applications include heavy machinery, such as cranes and earthmovers. Wheel drives are also widely used in municipal and agricultural vehicles, as well as material handling vehicles. The wheel drive is typically mounted directly into the wheel rim. A wheel drive may be fitted into two, three, or even four wheels.
A planetary gear set may be used in stages to provide different transmission rates. In order to choose the right gearbox for your application, consider the torque, backlash, and ratio you need. Then, consider the environment where the gearbox is used. Depending on its location, it might need to be protected from weather, water, and other elements. You can find a wide range of different sizes in the market.

Spur gears

There are two basic types of gearheads: planetary and spur gearheads. Each has its advantages and disadvantages depending on the application. This article will discuss the differences between these two types of gearheads. Spur gearheads are commonly used for transmission applications, while planetary gearheads are more widely used for motors. Spur gearheads are less expensive to produce than planetary gearheads, and they are more flexible in design.
There are many different types of spur gears. Among them, a 5:1 spur gear drive ratio means that the sun gear must rotate five times per revolution of the output carrier. The desired number of teeth is 24. In metric systems, the spur gears are referred to as mm and the moon gears as modules. Spur gears are used in many different types of applications, including automotive and agricultural machinery.
A planetary geartrain is a combination of ring and spur gears, which mesh with each other. There are two kinds of planetary geartrains: simple planetary gears and compound planetary gears. Spur gears are the most common type, with a sun gear and ring gear on either side of the sun. Simple planetary gears feature a single sun and ring gear, while compound planetary gears use multiple planets.
A planetary gearbox consists of two or more outer gears, which are arranged to rotate around the sun. The outer ring gear meshes with all of the planets in our solar system, while the sun gear rotates around the ring gear. Because of this, planetary gearboxes are very efficient even at low speeds. Their compact design makes them a desirable choice for space-constrained applications.
planetarygearbox

Helical gears

A planetary helical gearbox has two stages, each with its own input speed. In the study of planetary helical gear dynamics, the base circle radius and full-depth involute teeth are added to the ratio of each gear. The tangential position of the planets affects the dynamic amplifications and tooth forces. The tangential position error is an important factor in understanding the dynamic behaviour of helical planetary gears.
A helical gearbox has teeth oriented at an angle to the shaft, making them a better choice than spur gears. Helical gears also operate smoothly and quietly, while spur gears generate a thrust load during operation. Helical gears are also used in enclosed gear drives. They are the most common type of planetary gearbox. However, they can be expensive to produce. Whether you choose to use a helical or spur gearbox depends on the type of gearbox you need.
When choosing a planetary gear, it is important to understand the helix angle of the gear. The helix angle affects the way the planetary gears mesh, but does not change the fundamentals of planetary phasing. In each mesh, axial forces are introduced, which can either cancel or reinforce. The same applies to torques. So, if the ring gear is positioned at an angle of zero, helical gears will increase the axial forces.
The number of teeth on the planets is a variable parameter that must be considered in the design phase. Regardless of how many teeth are present, each planet must have a certain amount of tooth spacing to mesh properly with the ring or sun. The tip diameter is usually unknown in the conceptual design stage, but the pitch diameter may be used as an initial approximation. Asymmetrical helical gears may also cause undesirable noise.

Various sizes

There are several sizes and types of planetary gearboxes. The planetary gear sets feature the sun gear, the central gear, which is usually the input shaft, and the planet gears, which are the outer gears. A carrier connects the planet gears to the output shaft. The primary and secondary features of the planetary gearbox are important factors to consider. Besides these, there are other things to consider, such as the price, delivery time, and availability around the world. Some constructors are quicker than others in responding to inquiries. While others may be able to deliver every planetary gearbox out of stock, they will cost you more money.
The load share behavior of a planetary gearbox is comparable to that of a spur or a helical gearbox. Under low loads, individual gear meshes are slightly loaded, while other components have minimal deflections. In general, load sharing behaviour is affected mostly by assembly and manufacturing deviations. In this case, the elastic deflections help balance these effects. The load-sharing behavior of a planetary gearbox improves when the load increases.
Planetary gearboxes come in different sizes. The most common size is one with two or three planets. The size and type of the gears determine the transmission rate. Planetary gear sets come in stages. This gives you multiple transmission rate choices. Some companies offer small planetary gearboxes, while others offer larger ones. For those with special applications, make sure you check the torque, backlash, and ratio.
Whether the power is large or small, the planetary gearbox should be matched to the size of the drive. Some manufacturers also offer right-angle models. These designs incorporate other gear sets, such as a worm gear stage. Right-angle designs are ideal for situations where you need to vary the output torque. When determining the size of planetary gearboxes, make sure the drive shafts are lined up.
planetarygearbox

Applications

This report is designed to provide key information on the Global Applications of Planetary Gearbox Market, including the market size and forecast, competitive landscape, and market dynamics. The report also provides market estimates for the company segment and type segments, as well as end users. This report will also cover regional and country-level analysis, market share estimates, and mergers & acquisitions activity. The Global Applications of Planetary Gearbox Market report includes a detailed analysis of the key players in the market.
The most common application of a planetary gearbox is in the automobile industry, where it is used to distribute power between two wheels in a vehicle’s drive axle. In a four-wheel-drive car, this system is augmented by a centre differential. In hybrid electric vehicles, a summation gearbox combines the combustion engine with an electric motor, creating a hybrid vehicle that uses one single transmission system.
In the Global Industrial Planetary Gearbox Market, customer-specific planetary gears are commonly used for automated guided vehicles, intra-logistics, and agricultural technology. These gears allow for compact designs, even in tight spaces. A three-stage planetary gear can reach 300 Nm and support radial loads of 12 kN. For receiver systems, positioning accuracy is critical. A two-stage planetary gearbox was developed by CZPT. Its internal gear tension reduces torsional backlash, and manual controls are often used for high-quality signals.
The number of planetary gears is not fixed, but in industrial applications, the number of planetary gears is at least three. The more planetary gears a gearbox contains, the more torque it can transmit. Moreover, the multiple planetary gears mesh simultaneously during operation, which results in high efficiency and transmittable torque. There are many other advantages of a planetary gearbox, including reduced maintenance and high speed.

China factory 110mm Flange Desboer ND110V Series Ratioc16-100 Stepper Motor High Precision Speed Reducer Low Backlash Spur Gear Planetary Gearbox   planetary gearbox applicationChina factory 110mm Flange Desboer ND110V Series Ratioc16-100 Stepper Motor High Precision Speed Reducer Low Backlash Spur Gear Planetary Gearbox   planetary gearbox application
editor by CX 2023-11-12

China Best Sales Cast Iron Horizontal Compact Structure Mixer in-Line Foot Mounted Gear Reducer Planetary Gearbox for Stepper Motor near me factory

Product Description

Cast Iron Horizontal Compact Framework mixer in-Line Foot Mounted Gear Reducer Planetary Gearbox for Stepper Motor

 

 

P collection planetary gearbox with excellent rates
1.P Series Planetary Gear Units is designed according to the involute planetary gear transmission with inner mesh,outer mesh and divided power employed reasonably. 

two.P series planetary gear unit has the feature of light weight , small volume, high transmission ratio,  
high efficiency, smooth rotation, low noise and good applicability. 

3.P series is widely used in industries such as metallurgy,  mining,  hoisting and transportation, electrical power, energy resources, construction and building materials, light industry and traffic.

 

 

Positive aspects of a Planetary Gearbox With Output Shaft

The output shaft of a Planetary Gearbox connects to the pushed wheels, whilst the input shaft comes from the engine. These gears are interlinked and generate a vast range of equipment reductions, which are necessary to get a automobile rolling comfortably. Equipment reductions are the area exactly where the numerous “gears” are positioned. Right here are some illustrations. They can assist you determine what you need for your car. You might also want to discover about planetary gears.
planetarygearbox

Planetary gearboxes

Modern day cars are most very likely geared up with planetary gearboxes. If you happen to be doubtful if your vehicle uses planetary gears, you must 1st check with your car’s owner’s manual. If not, contact your dealership’s services department for much more information. Otherwise, you can do a quick look for on the world wide web to uncover out regardless of whether your vehicle has a planetary gearbox. These gearboxes are generally much more complicated than normal gears. Furthermore, they are equipped with more parts and require lubrication.
In addition to their lower noise levels, planetary gearboxes are also remarkably successful at transmission. These characteristics make them excellent for purposes demanding higher torque and tiny footprints. Unfortunately, there are numerous distinct varieties of planetary gearboxes on the industry, making it hard to find the appropriate 1. The adhering to write-up will give you some suggestions to assist you choose the correct planetary gearbox for your needs. Let’s take a search!

Planetary gears

A planetary gearbox has two major parts: the solar gear (also acknowledged as the central or input) and the earth gears (also recognized as outer or peripheral). These gears are linked collectively by a provider to the output shaft of the equipment. In some purposes, it is essential to use a planetary gearbox with lubrication to stop wear and tear. A planetary gearbox also has a tiny ring gear that helps maintain the planet gears together.
The major edge of a planetary gearbox is that it utilizes many tooth that have interaction at when, permitting for large-speed reduction with a small variety of gears. Simply because the gears are fairly modest, they have reduced inertia than their greater counterparts. Planetary gearboxes are compact, which can make them well-known for area-constrained apps. Because of their compact size and performance, planetary gearboxes are also frequently employed in motor automobiles.

Planetary gearboxes with output shaft

For high-speed, dynamic apps, planetary gearbox models with output shaft give the optimum solution. Thanks to their lower inertia, these gearheads supply excellent efficiency in several industrial programs. Furthermore, their broad assortment of variants makes it possible for consumers to pick the perfect merchandise for their software. This write-up examines some of the key positive aspects of planetary gearboxes with output shaft. Read on to discover more.
The planetary gearbox has two key parts: a sunshine gear and earth gears. The sunlight gear is generally the input gear, whilst the world gears are positioned at the outer edges of the system casing. Planet gears are held together by a provider that is related to the output shaft. Before choosing a specific gearbox for your application, make confident that you check the particular demands and the environment to which the device will be subjected.
A planetary gearbox has considerably less phases of gears, and as a result decrease backlash in contrast to spur gearboxes. Backlash is dropped movement that happens when the enamel of the gears are out of ideal alignment. This issue is common in all gears, but is considerably less in planetary gearboxes. As such, planetary gearboxes are far more productive. They can also be customized in accordance to the certain motor model and motor flange.
planetarygearbox

Planetary gearboxes with carrier

A planetary gearbox is a kind of gearbox with 3 or a lot more stages. They have a sunshine gear, which is typically the input gear, and planet gears, also named the outer gears. The provider that connects the earth gears to the output shaft is known as a ring equipment. A planetary gearbox is normally designed to meet specific software and environmental requirements, but there are some aspects to consider when picking a single.
The compact footprint of planetary equipment sets final results in high heat dissipation. This can be a difficulty in apps with sustained functionality or large speeds. As a end result, planetary equipment sets often contain lubricants, which present a cooling influence even though also reducing sounds and vibration. Some planetary gears even attribute a carrier to make the installation process less complicated. Listed here are some things to keep in head when selecting a planetary equipment set.
Planetary gearboxes with carrier have several benefits over other sorts of gearboxes. In contrast to typical gearboxes, planetary gears have a frequent central shaft, and the tangential forces between the gears cancel out at the centre of the ring gear. Due to the fact of this, planetary gearboxes are typically utilised in input/output purposes, and their compact dimensions permits for a broad variety of equipment reductions. These gears can also create increased torque density.

Planetary gearboxes with traction

Planetary gears are equivalent to the planetary method, in that every pinion rotates around a solar gear. The output of the planetary gear device is reduced than the travel rotation velocity, but the torque is larger. As the amount of world equipment wheels boosts, so does the torque. Planetary gear methods include three to four planet gears, and each is in continuous mesh with the other folks. Energy used to any one particular member rotates the whole assembly.
Common applications for planetary equipment sets include higher-precision movement management. In these programs, large torque, torsional stiffness, and lower backlash are essential. Planetary equipment sets are also best for motors with larger speeds. A amount of aspects add to the reliability of these products. The minimal backlash and massive torque capacity of a planetary equipment motor allow them to be utilised in a extensive selection of apps.

Planetary gearboxes with electrical motors

If you’re in the market place for a new gearbox, you might have currently read about planetary gearboxes. The planetary gearbox is a substantial-efficiency, lower-noise gearbox. CZPT manufactures substantial-torque planetary gearboxes with reduced backlash. They also make financial system planetary gearboxes for reduce loads. However, with so numerous diverse kinds available, picking the proper a single for your wants can be tough.
These planetary gearboxes are a compact alternative to conventional pinion-and-equipment reducers. They supply higher-speed reduction and high torque transfer, and are frequently employed for area-constrained apps. But prior to you can understand how they operate, you will require to comprehend a minor about their building. There are a number of items to appear for that you might not have seen ahead of.
The most frequent type of planetary gearbox is a PM81/LN. It functions a set of DC brush motors with diameter 77mm, a stator, and two or more outer gears. Every single of these gears is related to an output shaft by means of a carrier. They can also be utilised with brakes, encoders, or a clutch. A planetary gearbox is a single of the most reputable gearbox kinds on the market.

Planetary gearboxes with hydraulic motors

A planetary gearbox is a mix of two gears, the sunshine and the planets. The sunshine equipment rotates at large speed, whilst the planets roll all around and orbit close to the ring equipment. The output shaft has the same path of rotation as the enter shaft. The benefits of a planetary gearbox contain substantial reduction ratios, effectiveness, place-saving compactness, and larger overload potential. These gears are also more secure and compact, and they do not endure from self-locking qualities.
Planetary gearboxes are a highly efficient way to electricity hydraulic lifts. They can be input by means of electric, hydraulic, or air motors. The drive arrangement can be mounted on a bare shaft, splined shaft, or a parallel keyed input shaft. Relying on the software, bespoke gearboxes can be made with a range of attributes and capabilities.
planetarygearbox

Planetary gearboxes with combustion engines

There are several diverse programs of planetary equipment sets. The most common is the distribution of electrical power among two wheels in a car’s generate axle. Four-wheel drives use two axle differentials, which are additional augmented by a centre differential. Hybrid electrical autos use summation gearboxes to distribute electricity from the combustion engine to the wheels and to an electric powered motor. Planetary gear sets also combine the two distinct kinds of motors to kind one hybrid vehicle.
To recognize how planetary gear sets function, it is important to understand the underlying mechanical rules. For instance, Fig. 4.6 demonstrates a stick diagram illustrating two planetary gear sets related by a lever. The two levers are the same length, so the program is analogous to a one lever. When calculating the torque, it is important to take into account the lever diagram. Similarly, if two equipment sets are linked by vertical links, the horizontal links need to be horizontal.

China Best Sales Cast Iron Horizontal Compact Structure Mixer in-Line Foot Mounted Gear Reducer Planetary Gearbox for Stepper Motor     near me factory China Best Sales Cast Iron Horizontal Compact Structure Mixer in-Line Foot Mounted Gear Reducer Planetary Gearbox for Stepper Motor     near me factory

China Good quality NEMA 11 28mm Bipolar Hybrid Stepper Geared Motor with Planetary Gear Motor with Free Design Custom

Item Description

Hybrid Stepper Planetary Equipment Motor

Parameter:

HP281-1 28MM
Stepper Angel: 1.eight

Drawing:

Motor Electrical Specification:
 

Gearbox Specification:
 

About Us:

We specialised in exploring, establishing and servicing electric powered motors, gearbox and higher precision gears with the tiny modules.

After years of growth, we have an impartial solution style and the R&D staff, provider group, and expert good quality control crew.

What’s more, we have 2 joint ventures. One particular is located in HangZhou, which produces hybrid stepper motor, valuable linear stepper motor, brushless DC motor, servo motor, stepper motor driver, brushless motor driver, encoder and brake.

Another 1 is positioned in HangZhou, which produces DC equipment motor. The manufacturing unit has dozens of CNC equipment and higher precision take a look at tools, implements the method administration and computerized procedure in most producing approach.

We also have 2 cooperation factories. One is generating AC reversible synchronous motor and AC servo motor, the other 1 is creating linear long lasting stepper motor, permanent stepper motors.

Customer’s Visiting:

Associated Products:

 

Advantages of a Planetary Gearbox With Output Shaft

The output shaft of a Planetary Gearbox connects to the pushed wheels, although the enter shaft comes from the motor. These gears are interlinked and generate a extensive selection of gear reductions, which are essential to get a motor vehicle rolling comfortably. Equipment reductions are the location the place the various “gears” are located. Listed here are some illustrations. They can assist you determine what you need to have for your vehicle. You may possibly also want to understand about planetary gears.
planetarygearbox

Planetary gearboxes

Contemporary autos are most likely geared up with planetary gearboxes. If you are not sure if your automobile employs planetary gears, you need to very first seek the advice of your car’s owner’s manual. If not, make contact with your dealership’s support department for much more details. Normally, you can do a swift research on the web to uncover out whether your vehicle has a planetary gearbox. These gearboxes are generally more complicated than normal gears. Furthermore, they are geared up with much more parts and demand lubrication.
In addition to their low sound levels, planetary gearboxes are also remarkably successful at transmission. These features make them excellent for programs necessitating substantial torque and little footprints. However, there are a lot of different sorts of planetary gearboxes on the market, producing it challenging to find the appropriate a single. The adhering to write-up will give you some recommendations to help you pick the proper planetary gearbox for your needs. Let us consider a look!

Planetary gears

A planetary gearbox has two main factors: the sun equipment (also known as the central or enter) and the world gears (also known as outer or peripheral). These gears are linked jointly by a provider to the output shaft of the device. In some programs, it is needed to use a planetary gearbox with lubrication to stop dress in and tear. A planetary gearbox also has a little ring equipment that aids hold the earth gears with each other.
The main edge of a planetary gearbox is that it makes use of numerous enamel that have interaction at once, allowing for higher-speed reduction with a small variety of gears. Since the gears are fairly modest, they have decrease inertia than their greater counterparts. Planetary gearboxes are compact, which tends to make them common for room-constrained programs. Due to the fact of their compact measurement and effectiveness, planetary gearboxes are also generally utilised in motor automobiles.

Planetary gearboxes with output shaft

For higher-pace, dynamic programs, planetary gearbox models with output shaft supply the optimum solution. Many thanks to their low inertia, these gearheads produce excellent performance in a lot of industrial apps. Furthermore, their wide assortment of variants permits consumers to choose the perfect solution for their application. This post examines some of the crucial positive aspects of planetary gearboxes with output shaft. Study on to find out a lot more.
The planetary gearbox has two main elements: a sun equipment and earth gears. The sunshine gear is usually the enter equipment, whilst the earth gears are positioned at the outer edges of the program casing. World gears are held with each other by a carrier that is connected to the output shaft. Before picking a specific gearbox for your application, make certain that you verify the distinct needs and the setting to which the unit will be subjected.
A planetary gearbox has significantly less levels of gears, and thus lower backlash in contrast to spur gearboxes. Backlash is lost motion that takes place when the teeth of the gears are out of best alignment. This difficulty is typical in all gears, but is substantially considerably less in planetary gearboxes. As this sort of, planetary gearboxes are more productive. They can also be tailored according to the certain motor product and motor flange.
planetarygearbox

Planetary gearboxes with provider

A planetary gearbox is a type of gearbox with three or much more phases. They have a solar gear, which is usually the input gear, and world gears, also named the outer gears. The provider that connects the world gears to the output shaft is known as a ring equipment. A planetary gearbox is usually designed to satisfy distinct application and environmental requirements, but there are some factors to take into account when choosing one particular.
The compact footprint of planetary equipment sets final results in high warmth dissipation. This can be a issue in apps with sustained overall performance or higher speeds. As a result, planetary equipment sets frequently consist of lubricants, which current a cooling impact while also reducing sound and vibration. Some planetary gears even characteristic a carrier to make the installation method less difficult. Below are some things to preserve in head when picking a planetary equipment set.
Planetary gearboxes with provider have many benefits above other sorts of gearboxes. Unlike traditional gearboxes, planetary gears have a typical central shaft, and the tangential forces between the gears terminate out at the centre of the ring gear. Simply because of this, planetary gearboxes are frequently utilised in input/output purposes, and their compact dimensions permits for a vast variety of equipment reductions. These gears can also create increased torque density.

Planetary gearboxes with traction

Planetary gears are similar to the planetary method, in that every pinion rotates about a sun gear. The output of the planetary gear device is decrease than the generate rotation pace, but the torque is greater. As the number of planet equipment wheels will increase, so does the torque. Planetary gear methods include 3 to 4 world gears, and every is in continual mesh with the other people. Power used to any one particular member rotates the complete assembly.
Common applications for planetary gear sets incorporate higher-precision motion handle. In these apps, higher torque, torsional stiffness, and minimal backlash are needed. Planetary gear sets are also best for motors with greater speeds. A amount of aspects add to the trustworthiness of these gadgets. The reduced backlash and big torque ability of a planetary equipment motor enable them to be employed in a vast variety of apps.

Planetary gearboxes with electrical motors

If you happen to be in the marketplace for a new gearbox, you may have already heard about planetary gearboxes. The planetary gearbox is a large-efficiency, lower-sound gearbox. CZPT manufactures substantial-torque planetary gearboxes with low backlash. They also make financial system planetary gearboxes for reduced loads. Nonetheless, with so a lot of distinct types accessible, picking the appropriate one for your demands can be difficult.
These planetary gearboxes are a compact different to conventional pinion-and-gear reducers. They supply high-speed reduction and substantial torque transfer, and are usually used for area-constrained apps. But just before you can understand how they work, you will want to comprehend a little about their construction. There are a couple of things to look for that you might not have discovered ahead of.
The most widespread type of planetary gearbox is a PM81/LN. It attributes a established of DC brush motors with diameter 77mm, a stator, and two or more outer gears. Every of these gears is related to an output shaft by way of a carrier. They can also be employed with brakes, encoders, or a clutch. A planetary gearbox is one of the most reputable gearbox varieties on the market place.

Planetary gearboxes with hydraulic motors

A planetary gearbox is a mixture of two gears, the sun and the planets. The solar equipment rotates at large velocity, even though the planets roll all around and orbit all around the ring equipment. The output shaft has the identical route of rotation as the input shaft. The rewards of a planetary gearbox incorporate large reduction ratios, efficiency, area-preserving compactness, and larger overload capability. These gears are also more secure and compact, and they do not undergo from self-locking properties.
Planetary gearboxes are a highly efficient way to energy hydraulic lifts. They can be input through electrical, hydraulic, or air motors. The push arrangement can be mounted on a bare shaft, splined shaft, or a parallel keyed input shaft. Depending on the software, bespoke gearboxes can be made with a selection of attributes and features.
planetarygearbox

Planetary gearboxes with combustion engines

There are numerous various apps of planetary equipment sets. The most widespread is the distribution of power between two wheels in a car’s travel axle. Four-wheel drives use two axle differentials, which are more augmented by a centre differential. Hybrid electrical cars use summation gearboxes to distribute electricity from the combustion motor to the wheels and to an electrical motor. Planetary gear sets also merge the two diverse types of motors to form 1 hybrid motor vehicle.
To recognize how planetary equipment sets perform, it is important to recognize the fundamental mechanical ideas. For case in point, Fig. 4.6 displays a stick diagram illustrating two planetary equipment sets connected by a lever. The two levers are the very same length, so the program is analogous to a single lever. When calculating the torque, it is crucial to consider the lever diagram. In the same way, if two gear sets are linked by vertical back links, the horizontal backlinks must be horizontal.

China Good quality NEMA 11 28mm Bipolar Hybrid Stepper Geared Motor with Planetary Gear Motor     with Free Design CustomChina Good quality NEMA 11 28mm Bipolar Hybrid Stepper Geared Motor with Planetary Gear Motor     with Free Design Custom

China Hot selling High Rigidity High Efficiency Stepper Motor Planetary Gear Box with Good quality

Product Description

PFN90 series Substantial Rigidity Substantial Effectiveness Stepper Motor Planetary Gear Box

Item Description

Planetary gearbox is a variety of reducer with extensive versatility. The internal equipment adopts lower carbon alloy metal carburizing quenching and grinding or nitriding process. Planetary gearbox has the qualities of tiny composition measurement, large output torque, higher speed ratio, higher performance, protected and reputable overall performance, and so on. The inner equipment of the planetary gearbox can be divided into spur equipment and helical gear. Customers can pick the proper precision reducer in accordance to the requirements of the application.

Description:
(1).The output shaft is produced of massive size,huge span double bearing style,output shaft and planetary arm bracket as a whole.The input shaft is placed straight on the planet arm bracket to make certain that the reducer has higher working accuracy and maximum torsional rigidity.
(2).Shell and the interior ring equipment utilised integrated design and style,quenching and tempering soon after the processing of the enamel so that it can accomplish large torque,large precision,large use resistance.Moreover surface area nickel-plated anti-rust treatment,so that its corrosion resistance drastically enhanced.
(3).The planetary gear transmission employs complete needle roller without having retainer to boost the get in touch with surface,which significantly upgrades structural rigidity and services life.
(4).The gear is created of Japanese imported substance.Soon after the metallic chopping method,the vacuum carburizing heat therapy to 58-62HRC. And then by the hobbing,Get the ideal tooth shape,tooth route,to guarantee that the equipment of large precision and very good impact toughness.
(5).Input shaft and sunlight gear integrated construction,in buy to enhance the procedure precision of the reducer.

 Characteristics:

one.Hole output composition,straightforward installation.

two.Straight tooth push ,solitary cantilever construction.simple style,economic price tag.

three.Operating constant. Lower sound.

four.Low return backlash. Can fit most event.

five.The input relationship technical specs are comprehensive and there are numerous selections.
6.Keyway can be opened in the power shaft.
7.Square mount flange output,large precision,higher torque.
eight.Velocity ratio assortment:3-a hundred
9.Precision variety:8-16arcmin
10.Dimensions variety:sixty-160mm

Parameters:

 

Company Profile

Newgear(China) acquire German precision planetary equipment design and style and production engineering,Creation of large rigidity, tiny backlash, reduced noise, steady transmission, reputable and durable planetary reducer,commonly employed in different fields.

Packaging & Transport

A Brief Overview of the Spur Gear and the Helical Planetary Gearbox

This report will provide a quick overview of the Spur equipment and the helical planetary gearbox. To learn more about the rewards of these gearboxes, read on. Listed here are a handful of typical makes use of for planetary gears. A planetary gearbox is utilised in numerous autos. Its performance helps make it a well-known choice for tiny engines. Right here are three illustrations. Each has its rewards and drawbacks. Let’s explore each and every 1.
planetarygearbox

helical planetary gearbox

In terms of cost, the CZPT is an entry-stage, very dependable helical planetary gearbox. It is suitable for apps exactly where area, weight, and torque reduction are of large problem. On the other hand, the X-Treme collection is suited for programs necessitating higher-acceleration, high-axial and radial masses, and high-speed efficiency. This post will go over the positive aspects of each kind of planetary gearbox.
A planetary gearbox’s traction-based layout is a variation of the stepped-planet design and style. This variation relies on the compression of the factors of the stepped-earth design and style. The resulting style avoids restrictive assembly conditions and timing marks. In comparison to typical gearboxes, compound planetary gears have a greater transmission ratio, and they do so with an equal or smaller sized volume. For instance, a 2:1 ratio compound world would be utilised with a fifty-ton ring equipment, and the outcome would be the same as a 100-ton ring equipment, but the planetary disks would be fifty percent the diameter.
The Helical planetary gearbox utilizes a few factors: an input, an output, and a stationary situation. The fundamental design is very productive and transmits ninety seven% of the input electricity. There are three principal varieties of planetary gearboxes, each focusing on a different efficiency characteristic. The CZPT simple line is an excellent location to start your investigation into planetary gearboxes. In addition to its performance and flexibility, this gearbox has a host of modular functions.
The Helical planetary gearbox has multiple rewards. It is functional, light-weight, and straightforward to keep. Its composition combines a solar equipment and a world gear. Its enamel are organized in a way that they mesh with each other and the sun equipment. It can also be employed for stationary apps. The solar equipment retains the carrier stationary and rotates at the rate of -24/sixteen and -3/2, depending on the variety of teeth on each gear.
A helical planetary gearbox can decrease sounds. Its shape is also scaled-down, lowering the size of the method. The helical gears are normally quieter and run more smoothly. The zero helix-angle gears, in contrast, have smaller sizes and higher torque density. This is a benefit, but the latter also boosts the life of the system and is considerably less pricey. So, while the helical planetary gearbox has many benefits, the latter is advisable when area is constrained.
The helical gearbox is more effective than the spur gear, which is restricted by its lack of axial load component. The helical gears, on the other hand, generate substantial axial forces in the equipment mesh. They also exhibit a lot more sliding at the points of tooth get in touch with, adding friction forces. As this sort of, the Helical planetary gearbox is the preferred selection in servo purposes. If you happen to be seeking for a gearbox to minimize sound and boost efficiency, Helical planetary gearboxes are the proper decision.
The major differences among the two types of planetary gears can be found in the design and style of the two outer rings. The outer ring is also called the sun equipment. The two gears mesh together according to their possess axes. The outer ring is the planetary gear’s carrier. Its bodyweight is proportional to the portion of the ring that is stationary. The provider sets the gaps among the two gears.
Helical gears have angled enamel and are ideal for applications with large loads. They are also very tough and can transfer a large load. A common Helical gearbox has two pairs of teeth, and this assures smooth transmission. In addition, the enhanced get in touch with ratio leads to decrease fluctuations in mesh stiffness, which implies much more load potential. In conditions of price, Helical planetary gears are the most affordable gearbox kind.
The outer ring equipment drives the internal ring equipment and bordering planetary components. A wheel travel planetary gearbox may have as considerably as 332,000 N.m. torque. Yet another typical kind of planetary gearbox is wheel travel. It is related to a hub, but the outer ring equipment drives the wheels and the solar equipment. They are often blended more than a housing to increase dimension. 1-phase Helical gears can be used in bicycles, while a two-stage planetary equipment system can manage up to 113,000 N.m. torque.
The layout of a helical planetary geartrain is difficult. It must comply with a number of constraints. These constraints relate to the geometrical partnership of the planetary geartrains. This examine of the attainable design and style area of a Helical geartrain utilizes geometric layouts. The ring gear, sunshine, and ring equipment have no effect on the ratio of the planetary transmission. However, helical geartrains are a very good choice for several programs.
planetarygearbox

Spur equipment planetary gearbox

The blend of planetary gears and spur gears in a transmission method is known as a planetary or spur gearbox. Both the planetary equipment and spur equipment have their personal characteristics and are utilised in different types of automobiles. They perform in a related way, but are developed differently. Listed here are some essential differences among the two kinds of gears. Detailed below are some of the most essential variations among them:
Helical gears: As opposed to spur gears, helical gears make important axial forces in the gear mesh. They also feature greater sliding make contact with at the level of tooth speak to. The helix angle of a gearbox is generally in the range of 15 to 30 degrees. The greater the helix angle, the far more axial forces will be transmitted. The axial drive in a helical gearbox is better than that of a spur equipment, which is the reason why helical gears are more effective.
As you can see, the planetary gearhead has several variations and purposes. Even so, you need to take treatment in choosing the number of tooth for your planetary equipment program. A 5:1 spur equipment travel ratio, for illustration, indicates that the sunshine equipment requirements to comprehensive 5 revolutions for every output provider revolution. To attain this, you may want to select a sunshine gear with 24 teeth, or five mm for each and every revolution. You may want to know the metric models of the planetary gearhead for it to be compatible with various types of equipment.
One more crucial characteristic of a planetary gearbox is that it will not need all of the spur gears to rotate about the axis of the push shaft. Alternatively, the spur gears’ inside tooth are fastened and the push shaft is in the very same route as the output shaft. If you select a planetary gearbox with fastened interior teeth, you may require to make confident that it has adequate lubrication.
The other substantial big difference between a spur equipment and a planetary gearbox is the pitch. A planetary gearbox has a large pitch diameter, although a spur equipment has lower pitch. A spur equipment is in a position to take care of higher torques, but isn’t really as productive. In addition, its larger torque ability is a massive disadvantage. Its performance is equivalent to that of a spur equipment, but it is a lot considerably less noisy.
One more variation in between planetary and spur gear motors is their expense. Planetary equipment motors tend to be a lot more costly than spur equipment motors. But spur gears are less costly to create, as the gears themselves are smaller and simpler. However, planetary gear motors are much more efficient and effective. They can manage reduce torque programs. But every single equipment carries a fastened load, restricting their torque. A spur equipment motor also has less internal frictions, so it is typically suited for reduced torque apps.
Yet another difference in between spur gears and planetary gears is their orientation. Single spur gears are not coaxial gearboxes, so they are not coaxial. On the other hand, a planetary gearbox is coaxial, which means its enter shaft is also coaxial. In addition to this, a planetary gearbox is made of two sets of gear wheels with the very same orientation. This offers it the potential to attain concentricity.
Another distinction among spur gears and planetary gears is that a planetary equipment has an integer variety of tooth. This is crucial due to the fact every single gear have to mesh with a solar equipment or a ring gear. Moreover, every planet must have a corresponding quantity of tooth. For every earth to mesh with the sunshine, the enamel should have a specified distance apart from the other. The spacing among planets also issues.
Apart from the dimensions, the planetary gear program is also known as epicyclic gearing. A planetary equipment method has a sunshine gear in the heart, which serves as the enter gear. This gear has at the very least a few driven gears. These gears have interaction with every other from the inside of and type an internal spur gear style. These equipment sets are highly durable and ready to adjust ratios. If preferred, a planetary gear teach can be converted to an additional ratio, therefore enhancing its effectiveness.
Yet another important big difference among a spur equipment and a planetary gearbox is the sort of tooth. A spur equipment has enamel that are parallel to the shaft, while a planetary gear has tooth that are angled. This variety of equipment is most suitable for reduced-pace programs, where torque is needed to shift the actuation object. Spur gears also make noise and can damage gear teeth due to recurring collisions. A spur equipment can also slip, preventing torque from reaching the actuation object.

China Hot selling High Rigidity High Efficiency Stepper Motor Planetary Gear Box     with Good qualityChina Hot selling High Rigidity High Efficiency Stepper Motor Planetary Gear Box     with Good quality

China wholesaler Precision Helical Planetary Gear Reducer 140mm Speed 400W Servo Motor Gear Boxes for 57 Stepper Motor with Good quality

Merchandise Description

Precision Helical Planetary Gear Reducer 140mm Speed 400W Servo Motor Equipment Boxes For 57 Stepper Motor

Merchandise Description

Planetary gearbox is a sort of reducer with broad flexibility. The interior gear adopts minimal carbon alloy metal carburizing quenching and grinding or nitriding procedure. Planetary gearbox has the characteristics of little framework size, huge output torque, large pace ratio, substantial performance, risk-free and trustworthy functionality, and many others. The internal equipment of the planetary gearbox can be divided into spur equipment and helical gear. Customers can pick the appropriate precision reducer in accordance to the wants of the software.
Description:
1.The output shaft is created of huge measurement,massive span double bearing style,output shaft and planetary arm bracket as a complete.The enter shaft is placed immediately on the planet arm bracket to make sure that the reducer has higher running precision and maximum torsional rigidity.
2.Shell and the inner ring equipment employed built-in design,quenching and tempering after the processing of the teeth so that it can attain substantial torque,high precision,large wear resistance.In addition surface area nickel-plated anti-rust treatment method,so that its corrosion resistance significantly improved.
three.The planetary equipment transmission employs complete needle roller without retainer to improve the speak to surface,which drastically upgrades structural rigidity and provider lifestyle.
four.The gear is created of Japanese imported substance.Right after the metal chopping process,the vacuum carburizing heat treatment method to fifty eight-62HRC. And then by the hobbing,Get the very best tooth shape,tooth path,to ensure that the gear of large precision and good influence toughness.
five.Input shaft and sunshine equipment integrated composition,in buy to increase the operation precision of the reducer.
6.Ring gear processing engineering: Using interior equipment slotting equipment and hobbing equipment the precision of ring gear after processing can achieve .GB7.

Planetary reducer attribute:
one.Peaceful operation:helical gears add to reduce vibration and sounds.
2.Large precision:regular backlash is 3 arcmin,ideal for precision manage.
3.Large rigidity & torque:large rigidity&torque had been utilised integral ball bearings.
four.Adapter-bushing link:can be connected to any motor all in excess of the entire world.
5.No grease leakage:ideal dissolution employing higher viscosity anti-separation grease.
six.Maintenance-free:no want to exchange the grease for the existence of the unit.can be connected in any placement.
 

Planetary reducer parameters:

Model Variety:

Business Profile

Newgear(China) receive German precision planetary gear design and production engineering,Creation of high rigidity, small backlash, low sound, secure transmission, trustworthy and resilient planetary reducer,extensively utilised in various fields.
Newgear(China) has a full planetary equipment reducer manufacturing chain .

Packaging & Transport

 

A Short Overview of the Spur Equipment and the Helical Planetary Gearbox

This report will supply a short overview of the Spur gear and the helical planetary gearbox. To discover much more about the rewards of these gearboxes, go through on. Below are a handful of common uses for planetary gears. A planetary gearbox is employed in numerous cars. Its efficiency helps make it a popular selection for tiny engines. Right here are a few illustrations. Each and every has its rewards and drawbacks. Let us investigate every single one.
planetarygearbox

helical planetary gearbox

In phrases of value, the CZPT is an entry-level, highly trustworthy helical planetary gearbox. It is suitable for programs the place room, weight, and torque reduction are of higher problem. On the other hand, the X-Treme series is appropriate for programs necessitating substantial-acceleration, high-axial and radial hundreds, and large-speed performance. This post will discuss the rewards of every kind of planetary gearbox.
A planetary gearbox’s traction-based mostly style is a variation of the stepped-earth design and style. This variation relies on the compression of the elements of the stepped-world style. The resulting design and style avoids restrictive assembly conditions and timing marks. When compared to conventional gearboxes, compound planetary gears have a increased transmission ratio, and they do so with an equivalent or more compact quantity. For case in point, a 2:1 ratio compound planet would be used with a fifty-ton ring gear, and the consequence would be the same as a 100-ton ring gear, but the planetary disks would be 50 % the diameter.
The Helical planetary gearbox employs a few parts: an enter, an output, and a stationary situation. The fundamental product is highly effective and transmits ninety seven% of the input energy. There are a few main types of planetary gearboxes, every single concentrating on a diverse efficiency attribute. The CZPT basic line is an outstanding spot to commence your study into planetary gearboxes. In addition to its efficiency and flexibility, this gearbox has a host of modular functions.
The Helical planetary gearbox has multiple positive aspects. It is functional, light-weight, and effortless to sustain. Its composition brings together a sun gear and a earth gear. Its teeth are organized in a way that they mesh with each other and the sunlight equipment. It can also be utilized for stationary applications. The solar gear holds the carrier stationary and rotates at the price of -24/sixteen and -3/2, depending on the quantity of enamel on every single gear.
A helical planetary gearbox can minimize sound. Its form is also scaled-down, decreasing the dimension of the method. The helical gears are usually quieter and operate much more easily. The zero helix-angle gears, in contrast, have smaller dimensions and higher torque density. This is a advantage, but the latter also raises the lifestyle of the system and is less pricey. So, even though the helical planetary gearbox has a lot of advantages, the latter is suggested when space is minimal.
The helical gearbox is a lot more successful than the spur equipment, which is minimal by its absence of axial load component. The helical gears, on the other hand, make important axial forces in the equipment mesh. They also exhibit more sliding at the details of tooth contact, including friction forces. As this sort of, the Helical planetary gearbox is the chosen choice in servo purposes. If you happen to be seeking for a gearbox to minimize noise and increase effectiveness, Helical planetary gearboxes are the proper option.
The main distinctions in between the two sorts of planetary gears can be located in the style of the two outer rings. The outer ring is also known as the sun gear. The two gears mesh together according to their personal axes. The outer ring is the planetary gear’s provider. Its bodyweight is proportional to the portion of the ring that is stationary. The provider sets the gaps in between the two gears.
Helical gears have angled tooth and are excellent for purposes with large loads. They are also incredibly sturdy and can transfer a high load. A standard Helical gearbox has two pairs of tooth, and this ensures easy transmission. In addition, the increased contact ratio leads to lower fluctuations in mesh stiffness, which implies more load ability. In phrases of price, Helical planetary gears are the most cost-effective gearbox type.
The outer ring equipment drives the interior ring gear and bordering planetary areas. A wheel push planetary gearbox could have as a lot as 332,000 N.m. torque. One more frequent variety of planetary gearbox is wheel drive. It is related to a hub, but the outer ring equipment drives the wheels and the sun equipment. They are typically combined more than a housing to optimize measurement. 1-stage Helical gears can be used in bicycles, even though a two-stage planetary gear program can handle up to 113,000 N.m. torque.
The layout of a helical planetary geartrain is difficult. It have to comply with a number of constraints. These constraints relate to the geometrical relationship of the planetary geartrains. This review of the achievable design and style place of a Helical geartrain utilizes geometric layouts. The ring equipment, solar, and ring gear have no result on the ratio of the planetary transmission. Even so, helical geartrains are a good choice for many programs.
planetarygearbox

Spur equipment planetary gearbox

The mixture of planetary gears and spur gears in a transmission program is called a planetary or spur gearbox. Equally the planetary equipment and spur equipment have their very own traits and are employed in various sorts of cars. They function in a equivalent way, but are constructed in different ways. Listed here are some essential variances among the two types of gears. Outlined below are some of the most critical variations in between them:
Helical gears: As opposed to spur gears, helical gears generate important axial forces in the equipment mesh. They also characteristic greater sliding contact at the point of tooth make contact with. The helix angle of a gearbox is typically in the variety of fifteen to thirty levels. The larger the helix angle, the more axial forces will be transmitted. The axial force in a helical gearbox is increased than that of a spur equipment, which is the purpose why helical gears are far more successful.
As you can see, the planetary gearhead has many variations and purposes. Even so, you ought to just take treatment in selecting the amount of enamel for your planetary equipment method. A 5:1 spur gear drive ratio, for case in point, implies that the solar gear wants to comprehensive 5 revolutions for every output provider revolution. To achieve this, you will want to choose a sun gear with 24 teeth, or 5 mm for each and every revolution. You may want to know the metric units of the planetary gearhead for it to be suitable with distinct varieties of machines.
Another crucial function of a planetary gearbox is that it doesn’t need all of the spur gears to rotate around the axis of the drive shaft. Instead, the spur gears’ interior tooth are set and the travel shaft is in the same route as the output shaft. If you choose a planetary gearbox with fastened internal enamel, you are going to need to make positive that it has enough lubrication.
The other considerable distinction among a spur gear and a planetary gearbox is the pitch. A planetary gearbox has a large pitch diameter, while a spur equipment has reduced pitch. A spur gear is capable to take care of larger torques, but is not as successful. In addition, its increased torque capacity is a massive downside. Its efficiency is related to that of a spur equipment, but it is considerably considerably less noisy.
An additional big difference among planetary and spur equipment motors is their cost. Planetary equipment motors have a tendency to be a lot more expensive than spur equipment motors. But spur gears are more affordable to create, as the gears by themselves are more compact and less difficult. However, planetary equipment motors are more successful and strong. They can manage reduce torque apps. But each and every equipment carries a mounted load, restricting their torque. A spur gear motor also has less inner frictions, so it is often suited for decrease torque apps.
Another distinction in between spur gears and planetary gears is their orientation. Single spur gears are not coaxial gearboxes, so they are not coaxial. On the other hand, a planetary gearbox is coaxial, meaning its enter shaft is also coaxial. In addition to this, a planetary gearbox is produced of two sets of equipment wheels with the very same orientation. This provides it the capacity to accomplish concentricity.
Yet another variation among spur gears and planetary gears is that a planetary equipment has an integer number of tooth. This is essential since each and every gear must mesh with a solar gear or a ring equipment. Furthermore, every single earth should have a corresponding amount of teeth. For every single planet to mesh with the sunshine, the enamel have to have a particular distance aside from the other. The spacing amongst planets also issues.
Apart from the size, the planetary gear system is also identified as epicyclic gearing. A planetary equipment technique has a solar gear in the middle, which serves as the enter equipment. This gear has at minimum 3 pushed gears. These gears have interaction with each and every other from the inside and type an inner spur gear design and style. These equipment sets are highly tough and capable to adjust ratios. If sought after, a planetary equipment prepare can be converted to one more ratio, thereby maximizing its effectiveness.
Another important difference among a spur equipment and a planetary gearbox is the sort of teeth. A spur equipment has tooth that are parallel to the shaft, even though a planetary gear has tooth that are angled. This sort of gear is most appropriate for low-pace applications, the place torque is essential to shift the actuation object. Spur gears also generate sound and can harm equipment teeth thanks to recurring collisions. A spur gear can also slip, avoiding torque from reaching the actuation item.

China wholesaler Precision Helical Planetary Gear Reducer 140mm Speed 400W Servo Motor Gear Boxes for 57 Stepper Motor     with Good qualityChina wholesaler Precision Helical Planetary Gear Reducer 140mm Speed 400W Servo Motor Gear Boxes for 57 Stepper Motor     with Good quality