China Hot selling HS-Wedm Ball Bearing 624z 625z for Roller Pulley 13X5X4mm 16X5X5mm manufacturer

Product Description

Product Description

 HS-WEDM Ball Bearing 624Z  625Z For Roller Pulley 13x5x4mm  16x5x5mm



Picture Model no. Material Size
Stainless steel  16*5*5mm 
Stainless steel 13*5*4mm
  Stainless steel 15*5*6mm
  Stainless steel 19*6*6mm



Product range :



– spare parts for EDM machines (Sodick, Agie Charmilles, Fanuc,  Chmer , CZPT , Makino so on ) –  alternative


– EDM Drilling Machine  :  EDM electrode tubes  and drilling parts  


– EDM consumables  like EDM fiters , EDM resin , EDM wire  , KC-12 ,K-200 so on . 


-Jig tools  : EDM Stainless vise , Jig Holder …


Company Profile

 HangZhou CZPT sihai Precision CZPT Co., Ltd was founded in 2571 and is located in Chang’an Town HangZhou City, ZheJiang Province which is the biggest and famous CZPT Town . The location is excellent and the transportation is convenient..The company is mainly engaged in the production and sales of E D M spare parts , Non-standard custom hardware and E D M Filters products .Meanwhile , we also provide E D M wires ,E D M Ion exchange resin, E D M Molybdenum wire so on . These products are used in all slow, medium and fast wire cutting E D M machines , and supply “one-stop” service.
Our company knows that the development of the company depends on the innovation and quality of the products. , so our products have strict quality control from the procurement of raw materials to the sale of finished products and management of the environment. Therefore, we have obtained  I S O 9 0 0 1 and I S O 1 4 0 0 1 certificates. 
Our company’s products have been sold in more than 69 countries at home and abroad. Adhering to the business principle of mutual benefits, we have had a reliable reputation among our customers because of our professional services, quality products, competitive prices and perfect after-sales service. And we also can accept O E M and O D M order .
 We sincerely welcome friends from all over the world to visit our company and cooperate with us on the basis of long-term mutual benefits.     We are looking forward to receiving your enquiry soon. 


Our Advantages



Logistics packaging


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Condition: New
Certification: ISO9001, ISO14001
Customized: Customized
Material: Stainless Steel
Application: EDM Wire Cutting Machine
Delivery Time: 3 Days
US$ 3.2/Piece
1 Piece(Min.Order)

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pulley bearing

Are there specific considerations for choosing pulley bearings in applications with variable or high-speed pulley rotations?

When selecting pulley bearings for applications with variable or high-speed pulley rotations, there are several specific considerations that should be taken into account. These considerations are essential to ensure optimal performance, reliability, and longevity of the pulley system. Here are the key factors to consider:

1. Load Capacity:

Applications with variable or high-speed pulley rotations often experience fluctuating loads. It is crucial to choose pulley bearings with adequate load capacity to withstand the varying forces exerted on the bearing. The load capacity should be determined based on both the static and dynamic loads expected during operation. Properly sized bearings that can handle the maximum anticipated loads will prevent premature failure and ensure the longevity of the pulley system.

2. Lubrication:

High-speed and variable-speed applications place greater demands on lubrication. Lubrication is crucial for reducing friction, dissipating heat, and preventing metal-to-metal contact. It is important to select pulley bearings that are compatible with the lubrication method and frequency required for the specific application. Consideration should be given to the type of lubricant, its viscosity, and the lubrication system used. Proper lubrication is essential to minimize wear, maintain the bearing’s performance, and extend its service life.

3. Heat Dissipation:

High-speed pulley rotations can generate significant heat due to friction and internal bearing losses. It is important to choose pulley bearings that are designed to dissipate heat effectively. Bearings with features such as optimized internal geometry, efficient cage design, and appropriate materials can help dissipate heat and prevent overheating. Adequate heat dissipation is crucial to maintaining the bearing’s operating temperature within acceptable limits and avoiding thermal damage.

4. Cage Design:

The cage design plays a critical role in high-speed applications. It is important to select pulley bearings with cages that are designed to minimize friction, reduce centrifugal forces, and maintain the proper spacing and alignment of the rolling elements. Cages with low mass, high strength, and low friction materials are beneficial for high-speed pulley rotations. An optimized cage design ensures smooth operation, minimizes wear, and reduces the risk of cage failure or damage at high speeds.

5. Dynamic Stability:

High-speed or variable-speed pulley systems may experience dynamic instabilities such as vibrations or resonances. These instabilities can lead to increased wear, reduced bearing life, and potential damage to the pulley system. It is important to choose pulley bearings that have been designed and tested for dynamic stability under the anticipated operating conditions. Bearings with features such as precision manufacturing, balanced internal components, and effective damping mechanisms can help mitigate dynamic instabilities and ensure smooth and reliable operation.

6. Material Selection:

The choice of bearing materials is crucial for applications with variable or high-speed pulley rotations. Bearings should be made from high-quality materials that offer excellent strength, fatigue resistance, and dimensional stability. Materials with low friction coefficients and high wear resistance are desirable to reduce frictional losses and minimize wear at high speeds. Additionally, consideration should be given to the bearing’s ability to withstand temperature variations, corrosion, and other environmental factors that may affect its performance.

7. Sealing and Contamination Prevention:

Proper sealing and contamination prevention are critical in high-speed or variable-speed applications. The chosen pulley bearings should have effective seals or shields to protect against the ingress of contaminants such as dust, dirt, or moisture. Sealing systems should be designed to minimize friction, maintain proper lubrication, and prevent premature wear or damage caused by contamination. Choosing pulley bearings with advanced sealing technologies can help ensure reliable operation and extend the maintenance intervals in such applications.

8. Alignment and Mounting:

Accurate alignment and proper mounting are essential for the performance and reliability of pulley bearings in high-speed or variable-speed applications. Misalignment or incorrect mounting can lead to increased vibration, uneven load distribution, and premature failure. It is important to follow the manufacturer’s guidelines and recommendations for alignment and mounting procedures. The use of precision alignment tools and techniques can help achieve the necessary alignment accuracy, ensuring smooth operation and maximizing bearing life.

In summary, specific considerations need to be taken into account when choosing pulley bearings for applications with variable or high-speed pulley rotations. These considerations include load capacity, lubrication requirements, heat dissipation, cage design, dynamic stability, material selection, sealing and contamination prevention, as well as alignment and mounting procedures. By carefully considering these factors, one can select the appropriate pulley bearings that will deliver optimal performanceand durability in high-speed or variable-speed pulley systems.

pulley bearing

What are the potential challenges or limitations of using pulley bearings in specific industries?

Using pulley bearings in specific industries can present various challenges and limitations. While pulley bearings are widely used and highly versatile, certain factors can affect their performance and suitability for specific applications. Here’s a detailed explanation of the potential challenges and limitations of using pulley bearings in specific industries:

  • Load Capacity:

Pulley bearings have specific load capacity ratings that indicate the maximum load they can handle. In industries with heavy-duty applications or high loads, there is a risk of exceeding the load capacity of the bearings, leading to premature wear, reduced lifespan, or even catastrophic failure. It is important to carefully consider the load requirements and select pulley bearings that can handle the anticipated loads in a specific industry.

  • Environmental Factors:

The operating environment in different industries can pose challenges for pulley bearings. Factors such as extreme temperatures, moisture, dust, chemicals, or corrosive substances can impact the performance and lifespan of the bearings. For example, in industries with high temperatures, the lubricant may break down more quickly, leading to increased friction and wear. Similarly, exposure to corrosive environments can result in premature bearing failure. Proper sealing, lubrication, and selection of bearings with appropriate materials and coatings can help mitigate these challenges.

  • Speed and Vibration:

In industries where high speeds or vibration levels are present, pulley bearings may face limitations. High speeds can generate increased heat and centrifugal forces, which can affect the lubrication, stability, and overall performance of the bearings. Vibration can also impact the smooth operation of pulley bearings and lead to premature wear or failure. It is crucial to select bearings designed to handle the specific speed and vibration requirements of the industry.

  • Maintenance and Downtime:

Pulley bearings, like any mechanical component, require regular maintenance to ensure optimal performance and longevity. However, in certain industries where continuous operation is critical, scheduled maintenance or bearing replacements may result in downtime and production interruptions. Balancing the need for maintenance with minimizing downtime can be a challenge in industries that rely heavily on pulley systems. Implementing proactive maintenance practices, such as condition monitoring and predictive maintenance, can help mitigate these challenges.

  • Space and Design Constraints:

Some industries may have space constraints or specific design requirements that limit the size or configuration of pulley bearings. In compact or complex systems, it may be challenging to accommodate larger bearings or ensure proper alignment and fit. Design considerations, such as shaft size, clearance, and pulley geometry, need to be taken into account to ensure the optimal functioning of the pulley system within the given space constraints.

By understanding and addressing these potential challenges and limitations, industries can make informed decisions regarding the selection, installation, and maintenance of pulley bearings. Proper planning, regular monitoring, and adherence to manufacturer guidelines can help optimize the performance and reliability of pulley bearings in specific industries.

pulley bearing

What are pulley bearings, and where are they commonly used in pulley systems?

Pulley bearings are a type of bearing specifically designed for use in pulley systems. Pulleys are mechanical devices with a grooved wheel that rotates around an axle, and they are used to transmit power, change direction, or provide mechanical advantage in various applications. Pulley bearings are responsible for supporting the rotational motion of the pulley, reducing friction, and ensuring smooth and efficient operation. Here’s a detailed explanation of pulley bearings and their common applications in pulley systems:

Pulley bearings are typically designed as deep groove ball bearings or cylindrical roller bearings, depending on the specific requirements of the pulley system. These bearings are selected for their ability to handle both radial and axial loads generated by the tension and motion of the pulley system. The choice of bearing type depends on factors such as load capacity, speed, and operating conditions.

In pulley systems, pulley bearings are commonly used in the following applications:

  • Conveyor Systems: Pulley bearings are widely used in conveyor systems, where they support the rotation of pulleys that move and transport materials. Conveyor systems are found in industries such as manufacturing, mining, logistics, and agriculture, and pulley bearings play a critical role in ensuring smooth and reliable material handling operations.
  • Power Transmission Systems: Pulley bearings are utilized in power transmission systems, where pulleys are used to transfer rotational power from one component to another. These systems can be found in machinery, vehicles, and other mechanical applications. Pulley bearings help reduce friction and support the efficient transfer of power, enabling the smooth operation of the system.
  • Automotive Applications: Pulley bearings are commonly used in automotive applications, particularly in the engine, accessory, and timing belt systems. They support the rotation of pulleys that drive components such as alternators, air conditioning compressors, power steering pumps, and water pumps. Pulley bearings in automotive applications are subjected to high loads, varying speeds, and challenging operating conditions.
  • Gym Equipment: Pulley bearings are employed in various types of gym equipment, such as weight machines, cable machines, and exercise bikes. They enable the smooth movement of cables and pulleys, providing resistance and facilitating different exercises. Pulley bearings in gym equipment need to withstand constant use and repetitive motion while ensuring a comfortable and safe workout experience.
  • Window Shades and Blinds: Pulley systems are used in window shade and blind mechanisms to control the raising and lowering of the window coverings. Pulley bearings support the smooth operation of the pulleys, ensuring easy adjustment and reliable functionality of the window shades and blinds.

These are just a few examples of the many applications where pulley bearings are commonly used. In general, pulley bearings are essential components in pulley systems across various industries and everyday mechanical devices. They provide reliable support, reduce friction, and enable the efficient transfer of power and motion, contributing to the overall performance and longevity of pulley systems.

China Hot selling HS-Wedm Ball Bearing 624z 625z for Roller Pulley 13X5X4mm 16X5X5mm   manufacturerChina Hot selling HS-Wedm Ball Bearing 624z 625z for Roller Pulley 13X5X4mm 16X5X5mm   manufacturer
editor by CX 2024-05-14