China Best Sales Wg2210100148 Inner Ring Spur Gear for CZPTTruck Gearbox Parts Inner Gear Ring worm gear winch

Product Description

WGInner ring spur gear for CHINAMFG CHINAMFG truck gearbox parts Inner gear ring

Product Description

1,A complete set of processing and production processes:

From product blanking to delivery, we have production lines from mold manufacturing, processing and molding, electroplating, spraying, etc., so as to strictly control each link of the production process and ensure the delivery date and quality. Since the establishment of the factory, the company has accumulated a number of suppliers and established long-term partnership, laying a foundation for production.

2,Guarantee production:
Products pass strict quality inspection and have high stability: there are fixed raw material suppliers to reduce costs;
independent development: independent technology R&D team production and operation: flexible production and operation methods to meet customer needs

Packaging & Shipping


1. Our packing uses export wooden cases, plastic boxes, cartons or pallets. All the package are very strong, the wooden box is firmly bound, the package is covered with a waterproof film to prevent water or damage during transportation.Before packing, we can also stick corresponding labels and shipping marks according to your needs. All our goods are well packed.
2. According to the quantity, we can use express delivery, air transportation or CHINAMFG transportation, automobile transportation,railway transportation, etc. we have our own freight forwarders, and we can also use the designated freight forwarders of customers, which can meet various delivery requirements of customers, such as EXW, FOB, CIF, etc.It can also be exported from many ports in China.

Company Profile

HangZhou CHINAMFG International Trade Co., Ltd. was established in 2003. Its main business is the export of truck parts to the
Russian,Europe and Southeast Asia CHINAMFG ,sinoturk ,faw CHINAMFG CHINAMFG ZF ,cummins CHINAMFG LGMG CHINAMFG .DCEC,isuzu,caterpiller .CHINAMFG CHINAMFG spare parts .The company has its own warehouse in HangZhou with an area of 2000 square meters.and have a large stock .And Ability to quickly collect and deliver goods.Our main business is SINOTRUK, CHINAMFG , FAW, CHINAMFG and all kinds of construction machinery accessories. We always adhere to the quality of products as the core, to serve customers as the task.Hope to be able to better communicate with friends from all over the world, and through this communication, promote the development of cultural exchanges and economic exchanges between the 2 sides.


Our Advantages

inan CHINAMFG International Trade Co., Ltd. has been engaged in the business of auto parts for many years, has many company and product authorization certificates, and has won many honorary certificates trusted by consumers. Because of our honest management, high quality and low price products, warm and thoughtful service, we have won the unanimous praise of the majority of users.



1. who are we?
We are based in ZheJiang , China, start from 2013,sell to Mid East(50.00%),Eastern Europe(20.00%),Eastern Asia(10.00%),South America(7.00%),Southeast Asia(5.00%),Africa(4.00%),North America(3.00%),Domestic Market(00.00%). There are total about 11-50 people in our office.

2. how can we guarantee quality?
Always a pre-production sample before mass production;
Always final Inspection before shipment;

3.what can you buy from us?
Heavy Truck Parts and Construction Machinery Parts/Filter/Turbocharger/Clutch Disc/Clutch Cover/Water Pump/Truck Chassis Parts

4. why should you buy from us not from other suppliers?
HangZhou CHINAMFG International Trade Co., Ltd. is located in HangZhou city, the capital of ZheJiang Province. Main products are heavy truck accessories, light truck parts, engineering machinery parts and so on. We have perfect service system.


Shipping Cost:

Estimated freight per unit.

To be negotiated
After-sales Service: 6 Months
Warranty: 6 Months
Type: Cooling System


Customized Request

spur gear

How do you calculate the efficiency of a spur gear?

Calculating the efficiency of a spur gear involves considering the power losses that occur during gear operation. Here’s a detailed explanation:

In a gear system, power is transmitted from the driving gear (input) to the driven gear (output). However, due to various factors such as friction, misalignment, and deformation, some power is lost as heat and other forms of energy. The efficiency of a spur gear represents the ratio of the output power to the input power, taking into account these power losses.

Formula for Calculating Gear Efficiency:

The efficiency (η) of a spur gear can be calculated using the following formula:

η = (Output Power / Input Power) × 100%


η is the efficiency of the gear system expressed as a percentage.

Output Power is the power delivered by the driven gear (output) in the gear system.

Input Power is the power supplied to the driving gear (input) in the gear system.

Factors Affecting Gear Efficiency:

The efficiency of a spur gear is influenced by several factors, including:

  • Tooth Profile: The tooth profile of the gear affects the efficiency. Well-designed gear teeth with accurate involute profiles can minimize friction and power losses during meshing.
  • Lubrication: Proper lubrication between the gear teeth reduces friction, wear, and heat generation, improving gear efficiency. Insufficient or inadequate lubrication can result in increased power losses and reduced efficiency.
  • Gear Material: The selection of gear material affects efficiency. Materials with low friction coefficients and good wear resistance can help minimize power losses. Higher-quality materials and specialized gear coatings can improve efficiency.
  • Gear Alignment and Meshing: Proper alignment and precise meshing of the gear teeth are essential for optimal efficiency. Misalignment or incorrect gear meshing can lead to increased friction, noise, and power losses.
  • Bearing Friction: The efficiency of a gear system is influenced by the friction in the bearings supporting the gear shafts. High-quality bearings with low friction characteristics can contribute to improved gear efficiency.
  • Load Distribution: Uneven load distribution across the gear teeth can result in localized power losses and reduced efficiency. Proper design and gear system configuration should ensure even load distribution.

Interpreting Gear Efficiency:

The calculated gear efficiency indicates the percentage of input power that is effectively transmitted to the output. For example, if a gear system has an efficiency of 90%, it means that 90% of the input power is converted into useful output power, while the remaining 10% is lost as various forms of power dissipation.

It’s important to note that gear efficiency is not constant and can vary with operating conditions, lubrication quality, gear wear, and other factors. The calculated efficiency serves as an estimate and can be influenced by specific system characteristics and design choices.

By considering the factors affecting gear efficiency and implementing proper design, lubrication, and maintenance practices, gear efficiency can be optimized to enhance overall gear system performance and minimize power losses.

spur gear

What lubrication is required for spur gears?

The lubrication requirements for spur gears are essential to ensure smooth operation, minimize wear, reduce friction, and dissipate heat. Here’s a detailed explanation of the lubrication needed for spur gears:

Spur gears typically require lubricants that possess specific characteristics to provide effective lubrication. These lubricants should have the following properties:

  • Viscosity: The lubricant should have the appropriate viscosity to create a sufficient lubricating film between the gear teeth. The viscosity should be suitable for the operating conditions, including the load, speed, and temperature. Higher loads and speeds generally require higher viscosity lubricants to maintain an adequate lubricating film.
  • Extreme Pressure (EP) Properties: Spur gears may experience high contact pressures and sliding friction, especially during heavy load conditions. Lubricants with EP additives are necessary to provide enhanced protection against wear and prevent metal-to-metal contact between the gear teeth. EP additives form a protective film on the gear surfaces, reducing friction and extending gear life.
  • Anti-Wear (AW) Properties: Lubricants for spur gears should have anti-wear properties to protect the gear teeth from excessive wear and surface damage. AW additives form a protective layer on the gear surfaces, reducing friction and preventing metal-to-metal contact. This helps prolong the gear life and maintain gear system efficiency.
  • Oxidation and Corrosion Resistance: The lubricant should possess good oxidation resistance to withstand high operating temperatures without deteriorating. It should also provide corrosion protection to prevent rust and corrosion on the gear surfaces, especially in environments with moisture or aggressive contaminants.
  • Compatibility: The lubricant should be compatible with the materials used in the gear system, including the gear material, shafts, and bearings. It should not cause any adverse reactions or damage to the gear components. Consult the gear manufacturer’s recommendations for lubricant compatibility.

The specific type and grade of lubricant needed for spur gears depend on the application, operating conditions, and gear material. Common lubricants used for spur gears include mineral oils, synthetic oils, and grease. Synthetic lubricants are often preferred for their superior performance in terms of viscosity stability, oxidation resistance, and temperature extremes.

When applying lubrication to spur gears, ensure that the lubricant is evenly distributed across the gear teeth. Proper lubrication can be achieved through methods such as oil bath lubrication, oil mist lubrication, or oil application directly onto the gear teeth. The lubrication interval and quantity should be based on the gear system’s operating conditions and the lubricant manufacturer’s recommendations.

Regular inspection and maintenance of the gear system are necessary to monitor the lubricant condition, replenish as needed, and ensure the gears remain properly lubricated throughout their service life.

It is important to consult the gear manufacturer’s guidelines and recommendations, as they may provide specific lubrication requirements and considerations for their gear products.

spur gear

Can you explain the concept of straight-cut teeth in spur gears?

The concept of straight-cut teeth is fundamental to understanding the design and operation of spur gears. Straight-cut teeth, also known as straight teeth or parallel teeth, refer to the shape and arrangement of the teeth on a spur gear. Here’s a detailed explanation of the concept of straight-cut teeth in spur gears:

Spur gears have teeth that are cut straight and parallel to the gear axis. Each tooth has a uniform width and thickness, and the tooth profile is a straight line. The teeth are evenly spaced around the circumference of the gear, allowing them to mesh with other spur gears.

The key characteristics and concepts related to straight-cut teeth in spur gears include:

  • Tooth Profile: The tooth profile of a spur gear with straight-cut teeth is a straight line that extends radially from the gear’s pitch circle. The profile is perpendicular to the gear axis and remains constant throughout the tooth’s height.
  • Pitch Circle: The pitch circle is an imaginary circle that represents the theoretical point of contact between two meshing gears. For a spur gear, the pitch circle is located midway between the gear’s base circle (the bottom of the tooth profile) and the gear’s addendum circle (the top of the tooth profile).
  • Pressure Angle: The pressure angle is the angle between the line tangent to the tooth profile at the pitch point and a line perpendicular to the gear axis. It determines the force distribution between the meshing teeth and affects the gear’s load-bearing capacity and efficiency. Common pressure angles for spur gears are 20 degrees and 14.5 degrees.
  • Meshing: Straight-cut teeth in spur gears mesh directly with each other. The teeth engage and disengage along a line contact, creating a point or line contact between the contacting surfaces. This direct meshing arrangement allows for efficient power transmission and motion transfer.
  • Advantages and Limitations: Straight-cut teeth offer several advantages in spur gears. They are relatively simple to manufacture, resulting in cost-effective production. Moreover, they provide efficient power transmission and are suitable for moderate to high-speed applications. However, straight-cut teeth can generate more noise and vibration compared to certain other tooth profiles, and they may experience higher stress concentrations under heavy loads.

In summary, straight-cut teeth in spur gears refer to the straight and parallel arrangement of the gear’s teeth. The teeth have a uniform profile with a constant width and thickness. Understanding the concept of straight-cut teeth is essential for designing and analyzing spur gears, considering factors such as tooth profile, pitch circle, pressure angle, meshing characteristics, and the trade-offs between simplicity, efficiency, and noise considerations.

China Best Sales Wg2210100148 Inner Ring Spur Gear for CZPTTruck Gearbox Parts Inner Gear Ring worm gear winchChina Best Sales Wg2210100148 Inner Ring Spur Gear for CZPTTruck Gearbox Parts Inner Gear Ring worm gear winch
editor by CX 2023-09-28


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