China supplier Auto Parts Belt Tensioner Pulley Engine Deep Groove Ball Bearing wholesaler

Product Description

Auto parts belt tensioner pulley Engine Deep Groove Ball bearing 

Product Parameters

Product Name: Tensioner Bearing
Model Number: F81749-3
Outer Diameter(mm) 47
Height(mm) 17
Material Chrome steel
Sealed type OPEN,RZ,2RS,4RS
Tolerance P0,P6,P5,P4,P2
Clearance C2,C0,C3,C4,C5
Noize level Z,Z1,Z2,Z3
Application Automotive Car
OEM Service Accept

Product Description

Tensioner Bearing:

-The bearings are adopted optimized structure designing so that can attain the traits of high temperature resistant, high speed resistant, long life, high speed rotation,impact resistant,high radial load,etc.

-Sealing structure and seals have the traits of high sealing ability, heat-resistant, abrasiveness and also can prevent the leakage of the grease, as they are helpful for lengthening the bearings’ using life.

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Company Profile

ZHangZhouG SHENG YA BEARING TECHNOLOGY CO,LTD.was founded in 1996, covering an area of more than 10,000 square meters, with as sets of more than 50 million yuan, and more than 80 employees, including more than 10 professional and technical personnel with intermediate and senior professional titles. lt specializes in the production of automotive bearings motorcycle bearings, general machine bearings, precision machine tool bearings and home appliance bearings, with an annual production capacity of 10 million sets of small and medium-sized bearings.

Our company undertakes various types of non-standard special-shaped bearings, with a wide variety and fine workmanship. lt is located in Wen.ling, HangZhou City, an important industrial, commercial and tourist city in ZHangZhoug Province, with superior geographical location and convenient transportation.


Q1:ls your company factory or Trade Company?
A:We have our own factory, our type is factory +trade.

Q2: Could you accept OEM and customize?
A:Yes, we can customize it for you according to the sample or drawing.

Q3: What is the MOQ of your company?
A:Our MOQ is normally 10pcs, anyway lower MOQ is also acceptable with a little higher cost, as the more you purchase the cheaper cost you could get.


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After-sales Service: One Year Warranty
Warranty: One Year Warranty
Type: Tensioner Bearing
Material: Chrome Steel
Tolerance: P6
Certification: ISO9001
US$ 2/Piece
1 Piece(Min.Order)

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pulley bearing

Can you provide guidance on the selection and sizing of pulley bearings for specific pulley applications?

When selecting and sizing pulley bearings for specific pulley applications, several factors need to be considered. Here is a detailed explanation:

1. Load Requirements:

First, determine the load requirements of the pulley system. Calculate the radial and axial loads that the bearing will experience during operation. Consider both the static and dynamic loads, as well as any shock or impact loads that may occur. The load requirements will help determine the bearing type, size, and load capacity needed to support the pulley system effectively.

2. Speed and Operating Conditions:

Consider the rotational speed of the pulley and the operating conditions in which the bearing will operate. High-speed applications may require bearings with lower friction and better heat dissipation properties. Operating conditions, such as temperature, humidity, and exposure to contaminants or corrosive substances, should also be taken into account. Choose bearings that can withstand the specific operating conditions of the pulley application.

3. Bearing Type and Design:

Select the appropriate bearing type and design based on the application requirements. Common types of bearings used in pulley applications include deep groove ball bearings, cylindrical roller bearings, and tapered roller bearings. Consider factors such as load capacity, rotational speed, misalignment tolerance, and axial and radial stiffness when choosing the bearing type and design.

4. Bearing Size and Load Capacity:

Determine the appropriate bearing size and load capacity. This involves calculating the required bearing dimensions based on the load requirements and operating conditions. Consider factors such as the bearing’s dynamic load rating, static load rating, and fatigue life. The bearing should have sufficient load capacity to handle the expected loads and provide a reasonable lifespan under the given operating conditions.

5. Lubrication and Maintenance:

Consider the lubrication requirements and maintenance considerations for the pulley bearing. Determine whether the application requires lubricated bearings or self-lubricating bearings. Take into account factors such as the frequency of re-lubrication, the type of lubricant to be used, and any specific maintenance requirements. Proper lubrication and maintenance are crucial for ensuring the longevity and optimal performance of the pulley bearing.

6. Environmental Factors:

Take into account any environmental factors that may affect the performance and lifespan of the pulley bearing. For example, if the application operates in a dusty environment, consider using bearings with enhanced sealing mechanisms to prevent contamination. In corrosive environments, choose bearings with appropriate corrosion resistance properties. Environmental factors can significantly impact the selection and sizing of pulley bearings.

7. Consult Manufacturer’s Guidelines:

Consult the manufacturer’s guidelines, technical specifications, and application engineering support for the specific pulley bearing. Manufacturers often provide detailed information on bearing selection, sizing, and application considerations. They can offer valuable guidance and recommendations based on their expertise and knowledge of the product.

By considering these factors and consulting with bearing manufacturers or application engineers, you can make informed decisions regarding the selection and sizing of pulley bearings for specific pulley applications. Properly chosen and sized bearings will ensure reliable and efficient operation of the pulley system, leading to improved performance and extended service life.

pulley bearing

How do pulley bearings perform in high-speed or high-load pulley applications?

Pulley bearings are designed to perform reliably in various operating conditions, including high-speed or high-load pulley applications. These bearings are engineered to withstand the specific demands of such applications and provide efficient power transmission. Here’s a detailed explanation of how pulley bearings perform in high-speed or high-load pulley applications:

  • High-Speed Pulley Applications:

In high-speed pulley applications, such as high-speed machinery or power transmission systems, pulley bearings must be capable of operating at elevated rotational speeds without compromising performance or reliability. To meet these requirements, pulley bearings designed for high-speed applications typically feature several characteristics:

  • High-quality materials: Pulley bearings for high-speed applications are often made from high-performance materials that exhibit excellent dimensional stability, fatigue resistance, and low friction characteristics. These materials, such as high-grade steels or ceramics, help minimize heat generation and maintain stable operation at high speeds.
  • Precision manufacturing: High-speed pulley bearings undergo precise manufacturing processes to ensure tight tolerances and accurate dimensions. This precision manufacturing minimizes any imbalances or unevenness that could cause vibrations or instability at high speeds.
  • Cage design: The cage, which holds the rolling elements in place, is optimized for high-speed operation. It is typically designed to minimize friction, ensure efficient lubricant distribution, and reduce the centrifugal forces acting on the rolling elements.
  • Lubrication: Proper lubrication is critical in high-speed applications. Special lubricants with high thermal stability and low viscosity at high speeds are used to reduce friction, dissipate heat, and provide adequate film thickness between the rolling elements and raceways.
  • Sealing: High-speed pulley bearings often incorporate advanced sealing mechanisms to minimize the ingress of contaminants and retain lubrication. These seals help maintain a clean and lubricated environment within the bearing, enhancing its performance and longevity.
  • High-Load Pulley Applications:

In high-load pulley applications where heavy loads are transmitted through the pulley system, pulley bearings must be capable of withstanding substantial forces and maintaining reliable operation. Bearings used in high-load pulley applications typically exhibit the following features:

  • Robust construction: Pulley bearings for high-load applications are built with a sturdy and durable design to handle the applied loads. They often have larger rolling elements and increased contact areas to distribute the load more effectively and minimize the risk of premature bearing failure.
  • High load capacity: These bearings are specifically engineered to handle high radial and axial loads. They are designed to have a higher load rating and improved load distribution characteristics, ensuring optimal performance and longevity even under demanding load conditions.
  • Enhanced lubrication: Proper lubrication is crucial in high-load applications to reduce friction, dissipate heat, and provide adequate film thickness for load-bearing surfaces. Lubricants with high viscosity and excellent load-carrying properties are used to ensure reliable lubrication and prevent premature wear or damage.
  • Heat dissipation: High-load pulley bearings are designed to effectively dissipate heat generated by the friction between the rolling elements and raceways. This is achieved through optimized internal geometries, heat-resistant materials, and efficient lubrication, allowing the bearing to operate within acceptable temperature ranges.
  • Reliability features: Bearings for high-load pulley applications may incorporate additional features to enhance reliability, such as improved sealing mechanisms to protect against contamination, advanced cage designs to minimize wear, and specialized surface coatings or treatments to enhance resistance to wear, corrosion, or fatigue.

In summary, pulley bearings perform well in high-speed or high-load pulley applications when they are specifically designed and selected to meet the demands of these conditions. Bearings for high-speed applications prioritize factors such as material quality, precision manufacturing, cage design, lubrication, and sealing, while bearings for high-load applications focus on robust construction, load capacity, lubrication, heat dissipation, and reliability features. By considering these factors, pulley bearings can deliver reliable performance, extended lifespan, and efficient power transmission in high-speed or high-load pulley applications.

pulley bearing

How do pulley bearings contribute to reduced friction and smooth rotation in pulleys?

Pulley bearings play a crucial role in reducing friction and ensuring smooth rotation in pulley systems. These bearings are specifically designed to minimize the resistance between the pulley wheel and the axle, allowing for efficient power transmission and optimal performance. Here’s a detailed explanation of how pulley bearings contribute to reduced friction and smooth rotation in pulleys:

  • Low Friction Materials:

Pulley bearings are typically constructed using materials with low friction coefficients, such as high-quality steel or ceramic. These materials help to minimize the frictional forces between the bearing components, reducing energy losses and heat generation during rotation. By utilizing low friction materials, pulley bearings enable smoother and more efficient operation of the pulley system.

  • Precision Manufacturing:

Pulley bearings are manufactured with high precision to ensure proper alignment and smooth interaction between the bearing components. The inner and outer races, balls or rollers, and cage are carefully machined to tight tolerances, minimizing any irregularities or imperfections that could contribute to increased friction or uneven rotation. This precision manufacturing allows the pulley bearings to operate with minimal resistance and ensure smooth rotation.

  • Lubrication:

Proper lubrication is essential for reducing friction and ensuring smooth rotation in pulley bearings. Lubricants such as grease or oil are applied to the bearing surfaces to create a thin film that separates the rolling elements and raceways. This lubrication film reduces direct metal-to-metal contact, minimizing friction and wear. The lubricant also helps to dissipate heat generated during operation, further contributing to smooth rotation and extended bearing life.

  • Bearing Design and Configuration:

The design and configuration of pulley bearings are optimized to minimize friction and promote smooth rotation. Deep groove ball bearings or cylindrical roller bearings are commonly used in pulley applications due to their rolling contact design, which reduces friction compared to sliding contact bearings. Additionally, the bearings may incorporate features such as ball separators or roller-guiding cages that help maintain proper spacing and alignment, ensuring smooth and consistent rotation.

  • Sealing and Contamination Protection:

Pulley bearings often feature sealing mechanisms or protective shields to prevent the ingress of contaminants such as dirt, dust, and moisture. These seals and shields provide an additional barrier that keeps the bearing surfaces clean and free from debris. By reducing the presence of contaminants, pulley bearings can maintain their smooth operation, minimize friction, and prevent premature wear or damage to the bearing components.

  • Proper Installation and Maintenance:

Ensuring proper installation and regular maintenance of pulley bearings is essential for reducing friction and promoting smooth rotation. Proper alignment, appropriate preload or clearance adjustment, and correct lubrication replenishment are crucial factors that contribute to the optimal performance of pulley bearings. Regular inspection, cleaning, and lubrication maintenance help to identify and address any issues that could lead to increased friction or compromised rotation.

In summary, pulley bearings contribute to reduced friction and smooth rotation in pulleys through the use of low friction materials, precision manufacturing, proper lubrication, optimized bearing design, sealing and contamination protection, and proper installation and maintenance practices. By minimizing friction, these bearings ensure efficient power transmission, extend the life of the pulley system, and enhance overall performance in a wide range of applications.

China supplier Auto Parts Belt Tensioner Pulley Engine Deep Groove Ball Bearing   wholesalerChina supplier Auto Parts Belt Tensioner Pulley Engine Deep Groove Ball Bearing   wholesaler
editor by CX 2024-05-14