Tag Archives: gear production

China OEM Hot Sale Fully Automated Production ACMotor Speed reducer Worm Gear Motor Gear Box NRVVS075 Ratio7.5-100 Worm Gear Speed Reducer raw gear

Warranty: 1 year, 1 Year
Applicable Industries: Hotels, Garment Shops, Building Material Shops, Manufacturing Plant, Machinery Repair Shops, Food & Beverage Factory, Farms, Restaurant, Home Use, Retail, Food Shop, Printing Shops, Construction works , Energy & Mining, Food & Beverage Shops, Other, Advertising Company
Weight (KG): 10 KG
Customized support: OEM, ODM
Gearing Arrangement: Worm
Output Torque: 90-269N.m
Input Speed: 1450rpm
Output Speed: 23.3-186.7rpm
Product name: Worm Gear Reducer
Application: Industry
Color: Customer Request
Type: Worm Gearmotor
Keyword: Gearbox RV
Ratio: 7.5-100
Material: Aluminium Alloy
Mounting Position: Variable Mounted
Structures: Worm Gear Units
Packaging Details: CARTON

Product Overview youmule(UML) worm gearbox with independent intellectual property rights, is featured with low noise,low temperature rise,no oil leakage, short lead time, convenient installation and maintenance free.It includes NMRV worm gearbox and NRV worm gear box UML worm gearbox promotes lean production,builds intelligent factories, Hot Sale Fully Automated Production AC Motor Speed reducer Worm Gear Motor Gear Box NRV063 Ratio7.5-100 Worm Gear Speed Reducer and realizes the integration of research ,production, supply, marketing and service, so as to meet customers’ demand for rapid response through complete product plHangZhou and design such as “core product-extreme technology , peripheral product-extreme service, external product-extreme experience” and the implementation of the optimal plan of lean production in the whole value chain such as “product plHangZhou , design validation, processing test, assembly test, warehouse logistics, sales service, information system, HR, operation plan, strategy plHangZhou” UML provides great clients across the world! PRODUCT SPECIFICATIONS NRVVS075 Series i7.5-100 worm gear box

typeWorm Gear Speed Reducer/ Gearbox
Model No. NRVVS075
Ratio7.5,10,15,20, High power gear reduc box gearbox parallel f helical gear box 25,30,40,50,60,80,100
ColorBlue(Ral5571)/Silver Grey (RAL9006) Or On Customer Request
MaterialHousing: Size 25-110 Is Aluminum Alloy, Size 110-150 Is Cast-Iron
Worm Wheel: ZCuSn10Pb1
Worm:20Cr
Pinion:Tin Bronze
Output Shaft: Steel-45#
Usages:Industrial Machine: Food Stuff, Ceramics, Chemical, Packing, Dyeing,Wood working, Glass.
IEC Flange:/
NRVVS075 UML worm gearbox follows the concept of modular and optimized design, it includes worm gearbox,solid shaft input interface, IEC electric motor input interface, servo motor input interface, NEMA motor input interface, solid shaft output module, hollow shaft output module, flange output module, foot mounting, flange mounting, torque arm mounting and etc..This product supports the modular combination and integration of multi-stage gearbox with different types adapters.And available for customized base on customer requirement. FEATURES AT A GLANCE · High Performance Falk Gearbox with Lowest Price Aluminum Alloy Die-Casting Box·Nice Looking in Appearance·Compact in Structure Rust Proofing on Surface·Small Volume to Save Mounting Space·Good Radiating Characteristic·Strong Capacity of Loading and Overload·Stable Transmission ·Less Vibration and Noise ·Varies of Connecting Structure Right elevation Left elevation Front elevation PRODUCT CONFIGURATION CHANGCHAI high power engine Imported CZPT control valve Japan Shimadzu hydraulic motor SALES AND SERVICE NETWORK SIMILAR PRODUCTS FAQ Q1: Are you a trading company or a manufacturer ?A: We are a manufacturer in ZheJiang Province, China. Our company owns the ability of manufacturing, processing, designing and R&D.We welcome your visit.Q2: How we select models and specifications?A: According to the specific details of the demands from the part of inquiry, we will recommend the products’ models uponsynthesizing the factors of field of products usage, power, torque arm and ratio…Q3: How is your price? Can you offer any discount?A: Our prices are always competitive. If the customer can place a large order, we surely will allow discount.Q4: How long should I wait for the feedback after I send the inquiry?A4: We will reply as soon as possible, 12 hours at most.Q5: What is your product warranty period?A:About 12 monthsQ6:What kind of certifications do you have?A: We have the certifications of ISO9001,CEQ6: What industries are your gearboxes being used?A: Our gearboxes are widely applied to metallurgical equipment, mining equipment, automation equipment, food machinery, packagingequipment, tobacco equipment and so on contanct with us
/ 130571719
e-mail1746717139@qq.com
Title goes here.Semi-Automatic PET Bottle Blowing Machine Bottle Making Machine Bottle Moulding MachinePET Bottle Making Machine is suitable for producing PET plastic containers and bottles in all shapes. Title goes here.Semi-Automatic PET Bottle Blowing Machine Bottle Making Machine Bottle Moulding MachinePET Bottle Making Machine is suitable for producing PET plastic containers and bottles in all shapes. Title goes here.Semi-Automatic PET Bottle Blowing Machine Bottle Making Machine Bottle Moulding MachinePET Bottle Making Machine is suitable for producing PET plastic containers and bottles in all shapes.

Helical, Straight-Cut, and Spiral-Bevel Gears

If you are planning to use bevel gears in your machine, you need to understand the differences between Helical, Straight-cut, and Spiral bevel gears. This article will introduce you to these gears, as well as their applications. The article will also discuss the benefits and disadvantages of each type of bevel gear. Once you know the differences, you can choose the right gear for your machine. It is easy to learn about spiral bevel gears.
gear

Spiral bevel gear

Spiral bevel gears play a critical role in the aeronautical transmission system. Their failure can cause devastating accidents. Therefore, accurate detection and fault analysis are necessary for maximizing gear system efficiency. This article will discuss the role of computer aided tooth contact analysis in fault detection and meshing pinion position errors. You can use this method to detect problems in spiral bevel gears. Further, you will learn about its application in other transmission systems.
Spiral bevel gears are designed to mesh the gear teeth more slowly and appropriately. Compared to straight bevel gears, spiral bevel gears are less expensive to manufacture with CNC machining. Spiral bevel gears have a wide range of applications and can even be used to reduce the size of drive shafts and bearings. There are many advantages to spiral bevel gears, but most of them are low-cost.
This type of bevel gear has three basic elements: the pinion-gear pair, the load machine, and the output shaft. Each of these is in torsion. Torsional stiffness accounts for the elasticity of the system. Spiral bevel gears are ideal for applications requiring tight backlash monitoring and high-speed operations. CZPT precision machining and adjustable locknuts reduce backlash and allow for precise adjustments. This reduces maintenance and maximizes drive lifespan.
Spiral bevel gears are useful for both high-speed and low-speed applications. High-speed applications require spiral bevel gears for maximum efficiency and speed. They are also ideal for high-speed and high torque, as they can reduce rpm without affecting the vehicle’s speed. They are also great for transferring power between two shafts. Spiral bevel gears are widely used in automotive gears, construction equipment, and a variety of industrial applications.

Hypoid bevel gear

The Hypoid bevel gear is similar to the spiral bevel gear but differs in the shape of the teeth and pinion. The smallest ratio would result in the lowest gear reduction. A Hypoid bevel gear is very durable and efficient. It can be used in confined spaces and weighs less than an equivalent cylindrical gear. It is also a popular choice for high-torque applications. The Hypoid bevel gear is a good choice for applications requiring a high level of speed and torque.
The Hypoid bevel gear has multiple teeth that mesh with each other at the same time. Because of this, the gear transmits torque with very little noise. This allows it to transfer a higher torque with less noise. However, it must be noted that a Hypoid bevel gear is usually more expensive than a spiral bevel gear. The cost of a Hypoid bevel gear is higher, but its benefits make it a popular choice for some applications.
A Hypoid bevel gear can be made of several types. They may differ in the number of teeth and their spiral angles. In general, the smaller hypoid gear has a larger pinion than its counterpart. This means that the hypoid gear is more efficient and stronger than its bevel cousin. It can even be nearly silent if it is well lubricated. Once you’ve made the decision to get a Hypoid bevel gear, be sure to read up on its benefits.
Another common application for a Hypoid bevel gear is in automobiles. These gears are commonly used in the differential in automobiles and trucks. The torque transfer characteristics of the Hypoid gear system make it an excellent choice for many applications. In addition to maximizing efficiency, Hypoid gears also provide smoothness and efficiency. While some people may argue that a spiral bevel gear set is better, this is not an ideal solution for most automobile assemblies.
gear

Helical bevel gear

Compared to helical worm gears, helical bevel gears have a small, compact housing and are structurally optimized. They can be mounted in various ways and feature double chamber shaft seals. In addition, the diameter of the shaft and flange of a helical bevel gear is comparable to that of a worm gear. The gear box of a helical bevel gear unit can be as small as 1.6 inches, or as large as eight cubic feet.
The main characteristic of helical bevel gears is that the teeth on the driver gear are twisted to the left and the helical arc gears have a similar design. In addition to the backlash, the teeth of bevel gears are twisted in a clockwise and counterclockwise direction, depending on the number of helical bevels in the bevel. It is important to note that the tooth contact of a helical bevel gear will be reduced by about ten to twenty percent if there is no offset between the two gears.
In order to create a helical bevel gear, you need to first define the gear and shaft geometry. Once the geometry has been defined, you can proceed to add bosses and perforations. Then, specify the X-Y plane for both the gear and the shaft. Then, the cross section of the gear will be the basis for the solid created after revolution around the X-axis. This way, you can make sure that your gear will be compatible with the pinion.
The development of CNC machines and additive manufacturing processes has greatly simplified the manufacturing process for helical bevel gears. Today, it is possible to design an unlimited number of bevel gear geometry using high-tech machinery. By utilizing the kinematics of a CNC machine center, you can create an unlimited number of gears with the perfect geometry. In the process, you can make both helical bevel gears and spiral bevel gears.

Straight-cut bevel gear

A straight-cut bevel gear is the easiest to manufacture. The first method of manufacturing a straight bevel gear was to use a planer with an indexing head. Later, more efficient methods of manufacturing straight bevel gears were introduced, such as the Revacycle system and the Coniflex system. The latter method is used by CZPT. Here are some of the main benefits of using a straight-cut bevel gear.
A straight-cut bevel gear is defined by its teeth that intersect at the axis of the gear when extended. Straight-cut bevel gears are usually tapered in thickness, with the outer part being larger than the inner portion. Straight-cut bevel gears exhibit instantaneous lines of contact, and are best suited for low-speed, static-load applications. A common application for straight-cut bevel gears is in the differential systems of automobiles.
After being machined, straight-cut bevel gears undergo heat treatment. Case carburizing produces gears with surfaces of 60-63 Rc. Using this method, the pinion is 3 Rc harder than the gear to equalize wear. Flare hardening, flame hardening, and induction hardening methods are rarely used. Finish machining includes turning the outer and inner diameters and special machining processes.
The teeth of a straight-cut bevel gear experience impact and shock loading. Because the teeth of both gears come into contact abruptly, this leads to excessive noise and vibration. The latter limits the speed and power transmission capacity of the gear. On the other hand, a spiral-cut bevel gear experiences gradual but less-destructive loading. It can be used for high-speed applications, but it should be noted that a spiral-cut bevel gear is more complicated to manufacture.
gear

Spur-cut bevel gear

CZPT stocks bevel gears in spiral and straight tooth configurations, in a range of ratios from 1.5 to five. They are also highly remachinable except for the teeth. Spiral bevel gears have a low helix angle and excellent precision properties. CZPT stock bevel gears are manufactured using state-of-the-art technologies and know-how. Compared with spur-cut gears, these have a longer life span.
To determine the strength and durability of a spur-cut bevel gear, you can calculate its MA (mechanical advantage), surface durability (SD), and tooth number (Nb). These values will vary depending on the design and application environment. You can consult the corresponding guides, white papers, and technical specifications to find the best gear for your needs. In addition, CZPT offers a Supplier Discovery Platform that allows you to discover more than 500,000 suppliers.
Another type of spur gear is the double helical gear. It has both left-hand and right-hand helical teeth. This design balances thrust forces and provides extra gear shear area. Helical gears, on the other hand, feature spiral-cut teeth. While both types of gears may generate significant noise and vibration, helical gears are more efficient for high-speed applications. Spur-cut bevel gears may also cause similar effects.
In addition to diametral pitch, the addendum and dedendum have other important properties. The dedendum is the depth of the teeth below the pitch circle. This diameter is the key to determining the center distance between two spur gears. The radius of each pitch circle is equal to the entire depth of the spur gear. Spur gears often use the addendum and dedendum angles to describe the teeth.

China OEM Hot Sale Fully Automated Production ACMotor Speed reducer Worm Gear Motor Gear Box NRVVS075 Ratio7.5-100 Worm Gear Speed Reducer     raw gearChina OEM Hot Sale Fully Automated Production ACMotor Speed reducer Worm Gear Motor Gear Box NRVVS075 Ratio7.5-100 Worm Gear Speed Reducer     raw gear

China manufacturer Hot Sale Fully Automated Production AC Motor Speed reducer Worm Gear Motor Gear Box NRVF040 Ratio7.5-100 Worm Gear Speed Reducer with Hot selling

Warranty: 1 YEAR, 1 Year
Applicable Industries: Hotels, Garment Shops, Building Material Shops, Manufacturing Plant, Machinery Repair Shops, Food & Beverage Factory, Farms, Restaurant, Home Use, Retail, Food Shop, Printing Shops, Construction works , Energy & Mining, Food & Beverage Shops, Other, Advertising Company
Weight (KG): 2.5 KG
Customized support: OEM, ODM
Gearing Arrangement: Worm
Output Torque: 11-53Nm
Input Speed: 1450rpm
Output Speed: 14-186,7rpm
Product name: Worm Gear Reducer
Application: Industry
Color: Customer Request
Type: NMRV
Keyword: Gearbox RV
Ratio: 7.5-100
Material: Aluminium Alloy
Mounting Position: Variable Mounted
Structures: Worm Gear Units
Packaging Details: CARTON

Product Overview youmule(UML) worm gearbox with independent intellectual property rights, is featured with low noise,low temperature rise,no oil leakage, short lead time, convenient installation and maintenance free.It includes NMRV worm gearbox and NRV worm gear box UML worm gearbox promotes lean production,builds intelligent factories,and realizes the integration of research ,production, supply, marketing and service, so as to meet customers’ demand for rapid response through complete product plHangZhou and design such as “core product-extreme technology , High Torque AC Motor Marine Diesel Engine With Gearbox Planetary Gear Units peripheral product-extreme service, external product-extreme experience” and the implementation of the optimal plan of lean production in the whole value chain such as “product plHangZhou , design validation, processing test, assembly test, warehouse logistics, sales service, information system, HR, operation plan, strategy plHangZhou” UML provides great clients across the world! PRODUCT SPECIFICATIONS NRVF040 Series i7.5-100 worm gear box

typeWorm Gear Speed Reducer/ Gearbox
Model No. NRVF040
Ratio7.5,10,15,20,25,30,40,50,60,80,100
ColorBlue(Ral5571)/Silver Grey (RAL9006) Or On Customer Request
MaterialHousing: Size 25-110 Is Aluminum Alloy, Size 110-150 Is Cast-Iron
Worm Wheel: ZCuSn10Pb1
Worm:20Cr
Pinion:Tin Bronze
Output Shaft: Steel-45#
Usages:Industrial Machine: Food Stuff, Ceramics, Chemical, Packing, Dyeing,Wood working, Glass.
IEC Flange:/
NRV040 UML worm gearbox follows the concept of modular and optimized design, it includes worm gearbox, Hot Sale Fully Automated Production AC Motor Speed reducer Worm Gear Motor Gear Box NMRV050 Ratio7.5-100 Worm Gear Speed Reducer solid shaft input interface, IEC electric motor input interface, servo motor input interface, NEMA motor input interface, solid shaft output module, hollow shaft output module, flange output module, foot mounting, flange mounting, torque arm mounting and etc..This product supports the modular combination and integration of multi-stage gearbox with different types adapters.And available for customized base on customer requirement. FEATURES AT A GLANCE ·Aluminum Alloy Die-Casting Box·Nice Looking in Appearance·Compact in Structure Rust Proofing on Surface·Small Volume to Save Mounting Space·Good Radiating Characteristic·Strong Capacity of Loading and Overload·Stable Transmission ·Less Vibration and Noise ·Varies of Connecting Structure Right elevation Left elevation Front elevation PRODUCT CONFIGURATION CHANGCHAI high power engine Imported CZPT control valve Japan Shimadzu hydraulic motor SALES AND SERVICE NETWORK SIMILAR PRODUCTS FAQ Q1: Are you a trading company or a manufacturer ?A: We are a manufacturer in ZheJiang Province, China. Our company owns the ability of manufacturing, processing, designing and R&D.We welcome your visit.Q2: How we select models and specifications?A: According to the specific details of the demands from the part of inquiry, we will recommend the products’ models uponsynthesizing the factors of field of products usage, power, torque arm and ratio…Q3: How is your price? Can you offer any discount?A: Our prices are always competitive. If the customer can place a large order, we surely will allow discount.Q4: How long should I wait for the feedback after I send the inquiry?A4: We will reply as soon as possible, 12 hours at most.Q5: What is your product warranty period?A:About 12 monthsQ6:What kind of certifications do you have?A: We have the certifications of ISO9001,CEQ6: What industries are your gearboxes being used?A: Our gearboxes are widely applied to metallurgical equipment, mining equipment, automation equipment, food machinery, High Quality AT065-FL T Type 90 Degree Spiral Bevel Double Output Precision Steering Gearbox For Gear Reducer Reductor 11 Ratio packagingequipment, tobacco equipment and so on contanct with us
/ 130571719
e-mail1746717139@qq.com
Title goes here.Semi-Automatic PET Bottle Blowing Machine Bottle Making Machine Bottle Moulding MachinePET Bottle Making Machine is suitable for producing PET plastic containers and bottles in all shapes. Title goes here.Semi-Automatic PET Bottle Blowing Machine Bottle Making Machine Bottle Moulding MachinePET Bottle Making Machine is suitable for producing PET plastic containers and bottles in all shapes. Title goes here.Semi-Automatic PET Bottle Blowing Machine Bottle Making Machine Bottle Moulding MachinePET Bottle Making Machine is suitable for producing PET plastic containers and bottles in all shapes.

How to Design a Forging Spur Gear

Before you start designing your own spur gear, you need to understand its main components. Among them are Forging, Keyway, Spline, Set screw and other types. Understanding the differences between these types of spur gears is essential for making an informed decision. To learn more, keep reading. Also, don’t hesitate to contact me for assistance! Listed below are some helpful tips and tricks to design a spur gear. Hopefully, they will help you design the spur gear of your dreams.
Gear

Forging spur gears

Forging spur gears is one of the most important processes of automotive transmission components. The manufacturing process is complex and involves several steps, such as blank spheroidizing, hot forging, annealing, phosphating, and saponification. The material used for spur gears is typically 20CrMnTi. The process is completed by applying a continuous through extrusion forming method with dies designed for the sizing band length L and Splitting angle thickness T.
The process of forging spur gears can also use polyacetal (POM), a strong plastic commonly used for the manufacture of gears. This material is easy to mold and shape, and after hardening, it is extremely stiff and abrasion resistant. A number of metals and alloys are used for spur gears, including forged steel, stainless steel, and aluminum. Listed below are the different types of materials used in gear manufacturing and their advantages and disadvantages.
A spur gear’s tooth size is measured in modules, or m. Each number represents the number of teeth in the gear. As the number of teeth increases, so does its size. In general, the higher the number of teeth, the larger the module is. A high module gear has a large pressure angle. It’s also important to remember that spur gears must have the same module as the gears they are used to drive.

Set screw spur gears

A modern industry cannot function without set screw spur gears. These gears are highly efficient and are widely used in a variety of applications. Their design involves the calculation of speed and torque, which are both critical factors. The MEP model, for instance, considers the changing rigidity of a tooth pair along its path. The results are used to determine the type of spur gear required. Listed below are some tips for choosing a spur gear:
Type A. This type of gear does not have a hub. The gear itself is flat with a small hole in the middle. Set screw gears are most commonly used for lightweight applications without loads. The metal thickness can range from 0.25 mm to 3 mm. Set screw gears are also used for large machines that need to be strong and durable. This article provides an introduction to the different types of spur gears and how they differ from one another.
Pin Hub. Pin hub spur gears use a set screw to secure the pin. These gears are often connected to a shaft by dowel, spring, or roll pins. The pin is drilled to the precise diameter to fit inside the gear, so that it does not come loose. Pin hub spur gears have high tolerances, as the hole is not large enough to completely grip the shaft. This type of gear is generally the most expensive of the three.
Gear

Keyway spur gears

In today’s modern industry, spur gear transmissions are widely used to transfer power. These types of transmissions provide excellent efficiency but can be susceptible to power losses. These losses must be estimated during the design process. A key component of this analysis is the calculation of the contact area (2b) of the gear pair. However, this value is not necessarily applicable to every spur gear. Here are some examples of how to calculate this area. (See Figure 2)
Spur gears are characterized by having teeth parallel to the shafts and axis, and a pitch line velocity of up to 25 m/s is considered high. In addition, they are more efficient than helical gears of the same size. Unlike helical gears, spur gears are generally considered positive gears. They are often used for applications in which noise control is not an issue. The symmetry of the spur gear makes them especially suitable for applications where a constant speed is required.
Besides using a helical spur gear for the transmission, the gear can also have a standard tooth shape. Unlike helical gears, spur gears with an involute tooth form have thick roots, which prevents wear from the teeth. These gears are easily made with conventional production tools. The involute shape is an ideal choice for small-scale production and is one of the most popular types of spur gears.

Spline spur gears

When considering the types of spur gears that are used, it’s important to note the differences between the two. A spur gear, also called an involute gear, generates torque and regulates speed. It’s most common in car engines, but is also used in everyday appliances. However, one of the most significant drawbacks of spur gears is their noise. Because spur gears mesh only one tooth at a time, they create a high amount of stress and noise, making them unsuitable for everyday use.
The contact stress distribution chart represents the flank area of each gear tooth and the distance in both the axial and profile direction. A high contact area is located toward the center of the gear, which is caused by the micro-geometry of the gear. A positive l value indicates that there is no misalignment of the spline teeth on the interface with the helix hand. The opposite is true for negative l values.
Using an upper bound technique, Abdul and Dean studied the forging of spur gear forms. They assumed that the tooth profile would be a straight line. They also examined the non-dimensional forging pressure of a spline. Spline spur gears are commonly used in motors, gearboxes, and drills. The strength of spur gears and splines is primarily dependent on their radii and tooth diameter.
SUS303 and SUS304 stainless steel spur gears

Stainless steel spur gears are manufactured using different techniques, which depend on the material and the application. The most common process used in manufacturing them is cutting. Other processes involve rolling, casting, and forging. In addition, plastic spur gears are produced by injection molding, depending on the quantity of production required. SUS303 and SUS304 stainless steel spur gears can be made using a variety of materials, including structural carbon steel S45C, gray cast iron FC200, nonferrous metal C3604, engineering plastic MC901, and stainless steel.
The differences between 304 and 303 stainless steel spur gears lie in their composition. The two types of stainless steel share a common design, but have varying chemical compositions. China and Japan use the letters SUS304 and SUS303, which refer to their varying degrees of composition. As with most types of stainless steel, the two different grades are made to be used in industrial applications, such as planetary gears and spur gears.
Gear

Stainless steel spur gears

There are several things to look for in a stainless steel spur gear, including the diametral pitch, the number of teeth per unit diameter, and the angular velocity of the teeth. All of these aspects are critical to the performance of a spur gear, and the proper dimensional measurements are essential to the design and functionality of a spur gear. Those in the industry should be familiar with the terms used to describe spur gear parts, both to ensure clarity in production and in purchase orders.
A spur gear is a type of precision cylindrical gear with parallel teeth arranged in a rim. It is used in various applications, such as outboard motors, winches, construction equipment, lawn and garden equipment, turbine drives, pumps, centrifuges, and a variety of other machines. A spur gear is typically made from stainless steel and has a high level of durability. It is the most commonly used type of gear.
Stainless steel spur gears can come in many different shapes and sizes. Stainless steel spur gears are generally made of SUS304 or SUS303 stainless steel, which are used for their higher machinability. These gears are then heat-treated with nitriding or tooth surface induction. Unlike conventional gears, which need tooth grinding after heat-treating, stainless steel spur gears have a low wear rate and high machinability.

China manufacturer Hot Sale Fully Automated Production AC Motor Speed reducer Worm Gear Motor Gear Box NRVF040 Ratio7.5-100 Worm Gear Speed Reducer     with Hot sellingChina manufacturer Hot Sale Fully Automated Production AC Motor Speed reducer Worm Gear Motor Gear Box NRVF040 Ratio7.5-100 Worm Gear Speed Reducer     with Hot selling