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China Standard Hydraulic Planetary Drive Motor Reducer Reduction Gearbox disadvantages of planetary gearbox

Product Description

PROFESSIONAL MANUFACTURE
— SINCE 1995

Hydraulic Planetary Drive Motor reducer reduction gearbox

Chinese electric motor speed reducer is widely used in mining machinery, chemical industry,steel metallurgy, light

industry,environmental protection, paper making, printing, lifting transport, food industry and so on.

Main Series Product: R series helical gear motor reducer, K series spiral bevel gear reducer, NGW, P series planetary gear reducer, H B series helical gearbox, Z (ZDY, ZLY, ZSY, and ZFY) serial hard tooth surface cylindrical gearbox reducer, D (DBY and DCY) serial hard tooth surface cone gear reducer, cycloidal speed reducer, etc. Meanwhile, map sample processing business can be undertaken.

Product Description

 

Adopts modular design, which can be changed and combined according to customer requirements;

Adopts involute planetary gear transmission, uses internal and external meshing and power splitting;

The gears are all treated by carburizing and quenching to obtain a high-hard wear-resistant surface.

After heat treatment, the gears are all ground, which reduces noise and improves the efficiency and service life of the whole machine.

Light weight, small volume, large transmission ratio range, high efficiency, stable operation, low noise and strong adaptability.

Product Parameters

 

Size

Type

Transmission Ratio

Type

Transmission Ratio

 

 

9/10/11/12/13/14/
15/16/17/18/19/20
/21/22/23/24/25/26
/27/28/29/30/31/
32/33/34

P2NA/P2NB/
P2NC/P2ND

25/28/31.5/40

P3NA/P3NB/P3NC/P3ND

140/160/180/
200/225/250/280

N=Coaxial

S=Helical gear

L=Bevel gear

K=Bevel-helical A=Hollow shaft with shrink disc

B=Solid shaft with parallel key

C=Hollow shaft with involute splines

D=Solid shaft with involute splines

P2SA/P2SB/
P2SC/P2SD

45/50/56/63
/71/80/90/100/
112/125

P3SA/P3SB/P3SC/P3SD

280/315/355/400
/450/500/560/630/
710/800/900

P2LA/P2LB/
P2LC/P2LD

31.5/40/45/50
/56/63/71/80
/90/100

P3KA/P3KB/P3KC/P3KD

560-4000

P2KA/P2KB/
P2KC/P2KD

112/125/140/160/
180/200/
225/250/320/360/
400/450/500/560

 

Model selection for washing machine Gear Box Transmission:
Closely using the ideal reduction ratio.
Reduction ratio = servo motor speed / reducer output shaft speed
Torque calculation: Torque calculation is very important for the life of reducer, and pay attention to whether the maximum torque value (TP) of acceleration exceeds the maximum load torque of the reducer.
The applicable power is usually the applicable power of the servo models on the market, the applicability of the reducer is very high, the working coefficient can be maintained above 1.2, but the choice can also be based on their own needs to decide. industrial helical gearbox. 

Detailed Photos

Chinese Speed Reducer/industrial helical gearbox is a mechanical transmission in many fields of the national economy. The product categories covered by the industry include all kinds of gear reducer, planetary gear reducer and worm reducer, as well as various special transmission devices such as speed increasing device, speed control Devices, including various types of flexible transmission devices, such as compound transmission. Products and services in the field of metallurgy, nonferrous metals, coal, building materials, ships, water conservancy, electricity, construction machinery and petrochemical industries.

In all fields of national economy and national defense industry, gearbox products have a wide range of applications. Food light industry, electric machinery, construction machinery, metallurgy machinery, cement machinery, environmental protection machinery, electronic appliances, road construction machinery, water conservancy machinery, chemical machinery, mining machinery, conveyor machinery, building materials machinery, rubber machinery, petroleum machinery and other industries have strong demand of Reducer products.

 

Packaging & Shipping

 

Application

 

Driven machines
Waste water treatment Thickeners,filter presses,flocculation apparata,aerators,raking equipment,combined longitudinal and rotary rakes,pre-thickeners,screw pumps,water turbines,centrifugal pumps Dredgers Bucket conveyors, dumping devices, carterpillar travelling gears, bucket wheel excavators as pick up, bucket wheel excavator for primitive material, cutter head, traversing gears
Chemical industry Plate bending machines, extruders, dough mills, rubbers calenders, cooling drums, mixers for uniform media, agitators for media with uniform density, toasters, centrifuges Metal working mills plate tilters, ingot pushers, winding machines, cooling bed transfer frames, roller straigheners, table continuous intermittent, roller tables reversing tube mills, shears continuous, casting drivers, reversing CZPT mills
Metal working mills Reversing slabbing mills. reversing wire mills, reversing sheet mills, reversing plate mill, roll adjustment drives Conveyors Bucket conveyors, hauling winches, hoists, belt conveyors, good lifts, passenger lifts, apron conveyors, escalators, rail travlling gears
Frequency converters Reciprocating compressors
Cranes Slewing gears, luffing gears, travelling gears, hoisting gear, derricking jib cranes Cooling towers Cooling tower fans, blowers axial and radial
Cane sugar production Cane knives, cane mills Beet sugar production Beet cossettes macerators, extraction plants, mechanical refrigerators, juice boilers, sugar beet washing machines, sugar beet cutter
Paper machines Pulper drives Cableways Material ropeways, continuous ropeway
Cement industry Concrete mixer, breaker, rotary kilns, tube mills, separators, roll crushers    

Company Profile

 

Established in 1995 , HangZhou Boji Machinery is a professional manufacturer and exporter that is concerned with the design, development and production of Gearbox Speed Reducer. We are located in HangZhou of ZheJiang Province, with convenient transportation access. With our own brand “TianQi”, all of our products comply with international quality standards and are greatly appreciated in a variety of different markets throughout the world.
Our company possesses complete machining center, lathe, gear shaping machine, gear milling machine, gear grinding machine and assembling lines. Our well-equipped facilities and excellent quality control throughout all stages of production enables us to guarantee total customer satisfaction.
Besides, In 2005,we attained ISO9001 certification. As a result of our high quality products and outstanding customer service, we have gained a global sales network CZPT South America, Saudi Arabia, Vietnam, Pakistan, Philippines, South Africa and other countries and regions.
With rich export experience, high quality products, competitive prices, good service and in-time delivery, we certain that we can meet all of your requirement and exceed your expectations. Our feature is bright with new cooperative relationships with companies from all over the world. We look CZPT to speaking with you to future discuss how we can be of service to you.

FAQ

1. Who are we?
We are the Factory, with over 25 years of production experience, based in ZheJiang , China, start from 1995,sell to Domestic Market(50.00%),Mid East(10.00%),Southeast Asia(10.00%),Western Europe(5.00%),South America(5.00%),Eastern Europe(5.00%),Eastern Asia(5.00%),North America(3.00%),Africa(2.00%),Southern Europe(2.00%),South Asia(2.00%),Central America(1.00%).

2. Can you customize according to our requirements?
Yes, we can design nonstandard products according to customer’s drawing and sample.

3.What can you buy from us?
speed reducer,gearbox,gear motor,pump,crusher

4. Why should you buy from us not from other suppliers?
Founded in 1995, with over 20 years of production experience and credibility. With professional engineer team, advanced technology production and skilled workers.Specialized in the production of reducer. Map sample processing business can be undertaken.

5. What services can we provide?
Accepted Delivery Terms: FOB,CFR,CIF,EXW,DDP,DDU,Express Delivery;
Accepted Payment Currency:USD,EUR,JPY,CAD,AUD,HKD,GBP,CNY,CHF;
Accepted Payment Type: T/T,L/C,Credit Card,PayPal,Western Union,Cash;
Language Spoken:English,Chinese,Spanish,Japanese,Portuguese,German,Arabic,French,Russian,Korean,Hindi,Italian

 

Shipping Cost:

Estimated freight per unit.



To be negotiated
Application: Motor, Machinery, Manufacturing Plant
Hardness: Hardened Tooth Surface
Installation: Horizontal Type
Samples:
US$ 1000/Piece
1 Piece(Min.Order)

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Order Sample

Hydraulic Planetary Drive Motor reducer gearbox
Customization:
Available

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Customized Request

planetarygearbox

Planetary Gearbox

This article will explore the design and applications of a planetary gearbox. The reduction ratio of a planetary gearbox is dependent on the number of teeth in the gears. The ratios of planetary gearboxes are usually lower than those of conventional mechanical transmissions, which are mainly used to drive engines and generators. They are often the best choice for heavy-duty applications. The following are some of the advantages of planetary gearboxes.

planetary gearboxes

Planetary gearboxes work on a similar principle to solar systems. They rotate around a center gear called the sun gear, and two or more outer gears, called planet gears, are connected by a carrier. These gears then drive an output shaft. The arrangement of planet gears is similar to that of the Milky Way’s ring of planets. This arrangement produces the best torque density and stiffness for a gearbox.
As a compact alternative to normal pinion-and-gear reducers, planetary gearing offers many advantages. These characteristics make planetary gearing ideal for a variety of applications, including compactness and low weight. The efficiency of planetary gearing is enhanced by the fact that ninety percent of the input energy is transferred to the output. The gearboxes also have low noise and high torque density. Additionally, their design offers better load distribution, which contributes to a longer service life.
Planetary gears require lubrication. Because they have a smaller footprint than conventional gears, they dissipate heat well. In fact, lubrication can even lower vibration and noise. It’s also important to keep the gears properly lubricated to prevent the wear and tear that comes with use. The lubrication in planetary gears also helps keep them operating properly and reduces wear and tear on the gears.
A planetary gearbox uses multiple planetary parts to achieve the reduction goal. Each gear has an output shaft and a sun gear located in the center. The ring gear is fixed to the machine, while the sun gear is attached to a clamping system. The outer gears are connected to the carrier, and each planetary gear is held together by rings. This arrangement allows the planetary gear to be symmetrical with respect to the input shaft.
The gear ratio of a planetary gearbox is defined by the sun gear’s number of teeth. As the sun gear gets smaller, the ratio of the gear will increase. The ratio range of planetary gears ranges from 3:1 to ten to one. Eventually, however, the sun gear becomes too small, and the torque will fall significantly. The higher the ratio, the less torque the gears can transmit. So, planetary gears are often referred to as “planetary” gears.
planetarygearbox

Their design

The basic design of a Planetary Gearbox is quite simple. It consists of three interconnecting links, each of which has its own torque. The ring gear is fixed to the frame 0 at O, and the other two are fixed to each other at A and B. The ring gear, meanwhile, is attached to the planet arm 3 at O. All three parts are connected by joints. A free-body diagram is shown in Figure 9.
During the development process, the design team will divide the power to each individual planet into its respective power paths. This distribution will be based on the meshing condition of all gears in the system. Then, the design team will proceed to determine the loads on individual gear meshes. Using this method, it is possible to determine the loads on individual gear meshes and the shape of ring gear housing.
Planetary Gearboxes are made of three gear types. The sun gear is the center, which is connected to the other two gears by an internal tooth ring gear. The planet pinions are arranged in a carrier assembly that sets their spacing. The carrier also incorporates an output shaft. The three components in a Planetary Gearbox mesh with each other, and they rotate together as one. Depending on the application, they may rotate at different speeds or at different times.
The planetary gearbox’s design is unique. In a planetary gearbox, the input gear rotates around the central gear, while the outer gears are arranged around the sun gear. In addition, the ring gear holds the structure together. A carrier connects the outer gears to the output shaft. Ultimately, this gear system transmits high torque. This type of gearbox is ideal for high-speed operations.
The basic design of a Planetary Gearbox consists of multiple contacts that must mesh with each other. A single planet has an integer number of teeth, while the ring has a non-integer number. The teeth of the planets must mesh with each other, as well as the sun. The tooth counts, as well as the planet spacing, play a role in the design. A planetary gearbox must have an integer number of teeth to function properly.

Applications

In addition to the above-mentioned applications, planetary gearing is also used in machine tools, plastic machinery, derrick and dock cranes, and material handling equipments. Further, its application is found in dredging equipment, road-making machinery, sugar crystallizers, and mill drives. While its versatility and efficiency makes it a desirable choice for many industries, its complicated structure and construction make it a complex component.
Among the many benefits of using a planetary gearbox, the ability to transmit greater torque into a controlled space makes it a popular choice for many industries. Moreover, adding additional planet gears increases the torque density. This makes planetary gears suitable for applications requiring high torque. They are also used in electric screwdrivers and turbine engines. However, they are not used in everything. Some of the more common applications are discussed below:
One of the most important features of planetary gearboxes is their compact footprint. They are able to transmit torque while at the same time reducing noise and vibration. In addition to this, they are able to achieve a high speed without sacrificing high-quality performance. The compact footprint of these gears also allows them to be used in high-speed applications. In some cases, a planetary gearbox has sliding sections. Some of these sections are lubricated with oil, while others may require a synthetic gel. Despite these unique features, planetary gears have become common in many industries.
Planetary gears are composed of three components. The sun gear is the input gear, whereas the planet gears are the output gears. They are connected by a carrier. The carrier connects the input shaft with the output shaft. A planetary gearbox can be designed for various requirements, and the type you use will depend on the needs of your application. Its design and performance must meet your application’s needs.
The ratios of planetary gears vary depending on the number of planets. The smaller the sun gear, the greater the ratio. When planetary stages are used alone, the ratio range is 3:1 to 10:1. Higher ratios can be obtained by connecting several planetary stages together in the same ring gear. This method is known as a multi-stage gearbox. However, it can only be used in large gearboxes.
planetarygearbox

Maintenance

The main component of a planetary gearbox is the planetary gear. It requires regular maintenance and cleaning to remain in top shape. Demand for a longer life span protects all other components of the gearbox. This article will discuss the maintenance and cleaning procedures for planetary gears. After reading this article, you should know how to maintain your planetary gearbox properly. Hopefully, you can enjoy a longer life with your gearbox.
Firstly, it is important to know how to properly lubricate a planetary gearbox. The lubricant is essential as gears that operate at high speeds are subject to high levels of heat and friction. The housing of the planetary gearbox should be constructed to allow the heat to dissipate. The recommended oil is synthetic, and it should be filled between 30 and 50 percent. The lubricant should be changed at least every six months or as needed.
While it may seem unnecessary to replace a planetary gearbox, regular servicing will help it last a long time. A regular inspection will identify a problem and the appropriate repairs are needed. Once the planetary gearbox is full, it will plug with gear oil. To avoid this problem, consider getting the unit repaired instead of replacing the gearbox. This can save you a lot of money over a new planetary gearbox.
Proper lubrication is essential for a long life of your planetary gearbox. Oil change frequency should be based on oil temperature and operating speed. Oil at higher temperatures should be changed more frequently because it loses its molecular structure and cannot form a protective film. After this, oil filter maintenance should be performed every few months. Lastly, the gearbox oil needs to be checked regularly and replaced when necessary.

China Standard Hydraulic Planetary Drive Motor Reducer Reduction Gearbox   disadvantages of planetary gearboxChina Standard Hydraulic Planetary Drive Motor Reducer Reduction Gearbox   disadvantages of planetary gearbox
editor by CX 2023-05-31

China Best Sales Worm Reduction Gear Box Speed Reducer Jack Worm Agricultural Planetary Helical Bevel Worm Steering Gear Drive Motor High Speed Nmrv Gearbox Reducer Manufacture with Great quality

Product Description

  Worm Reduction Gear Box Velocity Reducer Jack Worm Agricultural Planetary Helical Bevel Worm Steering Equipment Generate Motor Large Velocity Nmrv Gearbox Reducer Manufacture

How does a worm equipment perform?
How Worm Gears Perform. An electric motor or motor applies rotational energy by means of to the worm. The worm rotates towards the wheel, and the screw face pushes on the teeth of the wheel. The wheel is pushed towards the load.

Can a worm gear go both instructions?
Worm drives can go possibly path, but they want to be created for it. As you can think about, turning the worm shaft underneath load will produce a thrust alongside the axis of the screw. Nevertheless, if you reverse the direction the course of thrust will reverse as effectively.

The fundamental structure of the worm gear reducer is largely composed of the worm gear, the shaft, the bearing, the box entire body and its components. Can be divided into 3 simple structural parts: box, worm equipment, bearing and shaft blend. The box is the foundation of all the accessories in the worm gear reducer. It is an crucial element that supports the set shaft components, guarantees the right relative position of the transmission parts and supports the load acting on the reducer. The principal perform of the worm gear is to transmit the motion and electrical power amongst the 2 staggered shafts.
 

 

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

This post will supply a transient overview of the Spur gear and the helical planetary gearbox. To find out a lot more about the rewards of these gearboxes, read through on. Listed here are a handful of typical uses for planetary gears. A planetary gearbox is utilised in numerous automobiles. Its efficiency makes it a well-liked selection for little engines. Below are three illustrations. Each and every has its advantages and negatives. Let’s investigate each and every one.
planetarygearbox

helical planetary gearbox

In phrases of price tag, the CZPT is an entry-stage, very reliable helical planetary gearbox. It is ideal for applications the place room, fat, and torque reduction are of substantial concern. On the other hand, the X-Treme sequence is ideal for programs requiring higher-acceleration, substantial-axial and radial masses, and high-velocity efficiency. This post will go over the positive aspects of each and every sort of planetary gearbox.
A planetary gearbox’s traction-dependent design and style is a variation of the stepped-world design. This variation depends on the compression of the components of the stepped-world layout. The resulting style avoids restrictive assembly situations and timing marks. Compared to conventional gearboxes, compound planetary gears have a higher transmission ratio, and they do so with an equivalent or scaled-down volume. For instance, a 2:1 ratio compound earth would be utilized with a 50-ton ring gear, and the consequence would be the very same as a one hundred-ton ring equipment, but the planetary disks would be half the diameter.
The Helical planetary gearbox utilizes 3 parts: an enter, an output, and a stationary situation. The basic design is highly efficient and transmits ninety seven% of the enter power. There are 3 principal sorts of planetary gearboxes, every focusing on a different overall performance attribute. The CZPT simple line is an excellent place to start off your research into planetary gearboxes. In addition to its efficiency and flexibility, this gearbox has a host of modular attributes.
The Helical planetary gearbox has multiple advantages. It is versatile, lightweight, and straightforward to preserve. Its framework brings together a sunlight equipment and a earth equipment. Its teeth are organized in a way that they mesh with every other and the sunlight equipment. It can also be employed for stationary applications. The sunshine equipment retains the provider stationary and rotates at the price of -24/sixteen and -3/2, relying on the variety of tooth on each equipment.
A helical planetary gearbox can minimize sounds. Its condition is also scaled-down, reducing the dimension of the technique. The helical gears are normally quieter and operate much more efficiently. The zero helix-angle gears, in distinction, have smaller sizes and increased torque density. This is a reward, but the latter also raises the life of the system and is considerably less expensive. So, whilst the helical planetary gearbox has several positive aspects, the latter is advised when area is minimal.
The helical gearbox is far more successful than the spur gear, which is minimal by its deficiency of axial load element. The helical gears, on the other hand, generate considerable axial forces in the gear mesh. They also exhibit a lot more sliding at the factors of tooth get in touch with, adding friction forces. As this sort of, the Helical planetary gearbox is the favored choice in servo applications. If you’re searching for a gearbox to decrease sounds and increase efficiency, Helical planetary gearboxes are the appropriate selection.
The major variations in between the two sorts of planetary gears can be located in the style of the two outer rings. The outer ring is also referred to as the solar gear. The two gears mesh collectively in accordance to their very own axes. The outer ring is the planetary gear’s provider. Its fat is proportional to the portion of the ring that is stationary. The provider sets the gaps between the two gears.
Helical gears have angled tooth and are best for programs with large masses. They are also incredibly tough and can transfer a high load. A common Helical gearbox has two pairs of teeth, and this guarantees sleek transmission. In addition, the enhanced make contact with ratio qualified prospects to reduced fluctuations in mesh stiffness, which indicates a lot more load ability. In terms of price, Helical planetary gears are the most cost-effective gearbox variety.
The outer ring gear drives the internal ring equipment and surrounding planetary areas. A wheel push planetary gearbox may possibly have as considerably as 332,000 N.m. torque. An additional widespread sort of planetary gearbox is wheel travel. It is comparable to a hub, but the outer ring equipment drives the wheels and the sunshine gear. They are typically mixed above a housing to optimize dimensions. One particular-phase Helical gears can be utilised in bicycles, while a two-phase planetary equipment system can handle up to 113,000 N.m. torque.
The style of a helical planetary geartrain is complicated. It have to comply with a number of constraints. These constraints relate to the geometrical romantic relationship of the planetary geartrains. This examine of the feasible layout place of a Helical geartrain uses geometric layouts. The ring gear, solar, and ring equipment have no impact on the ratio of the planetary transmission. However, helical geartrains are a good selection for a lot of apps.
planetarygearbox

Spur equipment planetary gearbox

The combination of planetary gears and spur gears in a transmission method is known as a planetary or spur gearbox. The two the planetary equipment and spur gear have their very own traits and are employed in different kinds of automobiles. They work in a related way, but are constructed differently. Right here are some critical distinctions among the two sorts of gears. Detailed below are some of the most crucial differences in between them:
Helical gears: As opposed to spur gears, helical gears create important axial forces in the gear mesh. They also function higher sliding make contact with at the point of tooth speak to. The helix angle of a gearbox is generally in the assortment of 15 to thirty degrees. The higher the helix angle, the a lot more axial forces will be transmitted. The axial power in a helical gearbox is increased than that of a spur gear, which is the explanation why helical gears are more productive.
As you can see, the planetary gearhead has numerous variants and purposes. However, you need to consider care in selecting the number of teeth for your planetary equipment system. A 5:1 spur equipment push ratio, for case in point, implies that the sunshine equipment requirements to complete 5 revolutions for each and every output carrier revolution. To achieve this, you’ll want to pick a sunlight equipment with 24 teeth, or five mm for each and every revolution. You will need to know the metric models of the planetary gearhead for it to be suitable with various kinds of devices.
One more important function of a planetary gearbox is that it will not call for all of the spur gears to rotate around the axis of the push shaft. Alternatively, the spur gears’ inside teeth are set and the drive shaft is in the very same path as the output shaft. If you pick a planetary gearbox with mounted internal teeth, you may need to make positive that it has adequate lubrication.
The other important big difference among a spur equipment and a planetary gearbox is the pitch. A planetary gearbox has a high pitch diameter, whilst a spur gear has minimal pitch. A spur gear is able to take care of greater torques, but isn’t as efficient. In addition, its greater torque ability is a large drawback. Its efficiency is comparable to that of a spur equipment, but it is considerably significantly less noisy.
Yet another big difference in between planetary and spur equipment motors is their value. Planetary equipment motors have a tendency to be more high-priced than spur equipment motors. But spur gears are less costly to generate, as the gears themselves are smaller and less difficult. Nevertheless, planetary gear motors are far more efficient and effective. They can take care of lower torque programs. But each equipment carries a mounted load, restricting their torque. A spur equipment motor also has fewer inside frictions, so it is usually suited for reduce torque purposes.
An additional variation in between spur gears and planetary gears is their orientation. Solitary spur gears are not coaxial gearboxes, so they’re not coaxial. On the other hand, a planetary gearbox is coaxial, indicating its enter shaft is also coaxial. In addition to this, a planetary gearbox is manufactured of two sets of gear wheels with the exact same orientation. This offers it the potential to attain concentricity.
Another big difference between spur gears and planetary gears is that a planetary gear has an integer amount of teeth. This is critical because every equipment need to mesh with a sun equipment or a ring equipment. Additionally, each and every earth have to have a corresponding number of teeth. For each planet to mesh with the solar, the teeth must have a particular distance apart from the other. The spacing in between planets also matters.
In addition to the size, the planetary equipment technique is also acknowledged as epicyclic gearing. A planetary equipment program has a sunshine equipment in the heart, which serves as the input equipment. This equipment has at minimum 3 driven gears. These gears engage with each and every other from the inside and kind an inner spur gear design and style. These gear sets are highly sturdy and ready to alter ratios. If wanted, a planetary equipment teach can be converted to yet another ratio, thereby boosting its performance.
One more important difference in between a spur gear and a planetary gearbox is the kind of enamel. A spur equipment has teeth that are parallel to the shaft, although a planetary equipment has enamel that are angled. This type of gear is most suitable for lower-velocity apps, the place torque is needed to go the actuation object. Spur gears also create sound and can harm gear tooth due to recurring collisions. A spur gear can also slip, avoiding torque from reaching the actuation object.

China Best Sales Worm Reduction Gear Box Speed Reducer Jack Worm Agricultural Planetary Helical Bevel Worm Steering Gear Drive Motor High Speed Nmrv Gearbox Reducer Manufacture     with Great qualityChina Best Sales Worm Reduction Gear Box Speed Reducer Jack Worm Agricultural Planetary Helical Bevel Worm Steering Gear Drive Motor High Speed Nmrv Gearbox Reducer Manufacture     with Great quality