Product Description

Product Description

Item No.:  SS698ZZ/SS698-2RS
Type: Deep Groove Ball Bearing
Material: Stainless Steel(AISI440C/9Cr18)
Bore diameter: 8mm Outer diameter : 19mm Width(Height/Thickness): 6mm
Size: 8*19*6mm
Dynamic load C0: 1.99 Static load C0r: 0.865 Grease: 33000 Oil: 39000
Cage(retainer): Ribbon Cage(SPCC/T8)
Closures: 2 Metal Shields(SPCC)/2 Rubber Seals(NBR)
Balls: Stainless Steel Balls
Lubrication: Grease


Item No. Bore diameter
Outer diameter
SS698ZZ 8 19 6 2 Metal Shields(SPCC)
SS698-2RS 8 19 6 2 Rubber Seals(NBR)


Detailed Photos



Our Advantages

 Compared with ordinary bearings, stainless steel bearings have distinct material advantage because stainless steel bearings
have more wide application than ordinary bearings. In rusty and corrosive environment, the cost performance of stainless steel
bearings is outstanding specially.

 Stainless Steel Bearing:
1. stronger anti-rust property and anti-corrosion property.
2. CZPT to serve under -60ºC~+300ºC.
3. resist humidity and corrosion caused by other media.
4. has a deep bearing raceway groove, and the fit between the bearing raceway and the ball is extremely high.
5. high mechanical strength and large loading capacity.

 Our company provides high-precision homemade bearing of ordinary material, including deep groove ball bearing and full complement cylindrical roller bearings.
 The material refers to high-quality bearing steel, thermal treatment technology is put under strict control, and it is CZPT to carry out cryogenic treatment. And full complement cylindrical roller bearings adopts advanced roller CZPT for thermal treatment. Other technologies are all processed by full-automatic and semiautomatic equipment, and the production technology and quality control are arranged as per P5 precision. It products widely support home and abroad manufacturers of electric tools, mechanical equipment, automobile components, etc.

Manufacture Equipment


Company Profile


 HangZhou WOLEE induststial Co., Ltd. was founded in 2015. It is a professional company which engages in import and export of industrial components and is a professional production base with joint stocks.

 The company mainly operates bearings and other industrial components such as chain, CZPT rail, gear and micro gearbox. Its products are widely used in the fields of metallurgy, mining, papermaking, petrochemical, power, railway, aviation, cement, textile, machinery, etc., it has lots of clients among these fields and has accumulated rich experience to meet different demands of all sectors. At present, its trade scale expands increasingly, its clients are all across the world, and it wins the trust of home and abroad clients by virtue of good reputation.

 The company adheres to the tenet of “people first, quality first, credit first and reputation first” and provides each client with top service.

 It heartily hopes to join hands with you to create a wonderful world.

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Aligning: Non-Aligning Bearing
Separated: Unseparated
Rows Number: Single
US$ 10/Piece
1 Piece(Min.Order)


Order Sample

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Currency: US$
Return&refunds: You can apply for a refund up to 30 days after receipt of the products.

steel ball bearing

How do steel ball bearings enhance the overall efficiency and functionality of machinery and equipment?

Steel ball bearings play a crucial role in enhancing the overall efficiency and functionality of machinery and equipment. They provide various benefits that improve performance, reduce friction, and enable smooth operation. Here are some ways in which steel ball bearings enhance the efficiency and functionality of machinery and equipment:

1. Friction Reduction:

Steel ball bearings are designed to minimize friction between moving parts. The rolling motion of the steel balls reduces the contact area and frictional resistance compared to sliding contact. This reduction in friction results in less energy loss and improved mechanical efficiency. By reducing friction, steel ball bearings help optimize the operation of machinery and equipment, leading to lower energy consumption and increased overall efficiency.

2. Load Distribution:

Steel ball bearings distribute loads evenly across their contact surfaces. This load distribution capability allows machinery and equipment to handle higher loads without excessive wear or premature failure. By evenly distributing the applied loads, steel ball bearings help prevent localized stress concentrations, prolonging the service life of the equipment and reducing the need for frequent maintenance or replacements.

3. High-Speed Capability:

Steel ball bearings are well-suited for high-speed applications. The rolling element design and low friction characteristics allow steel ball bearings to operate efficiently at high rotational speeds. They can withstand the centrifugal forces generated at high speeds while maintaining stability and precision. The ability of steel ball bearings to handle high speeds enables machinery and equipment to operate at optimal performance levels, resulting in improved productivity and throughput.

4. Precision and Accuracy:

Steel ball bearings contribute to the precision and accuracy of machinery and equipment. The uniform size and shape of the steel balls, combined with precise manufacturing tolerances, result in consistent and predictable bearing performance. This precision allows for accurate positioning, smooth motion control, and reliable operation of machinery and equipment. Whether it’s in machine tools, robotics, or other precision applications, steel ball bearings help maintain the required levels of precision and accuracy.

5. Vibration and Noise Reduction:

Steel ball bearings help reduce vibration and noise levels in machinery and equipment. The rolling motion of the steel balls dampens vibrations generated during operation, leading to smoother and quieter performance. Reduced vibration and noise levels not only improve user comfort but also minimize the risk of damage to sensitive components and increase the overall reliability of the equipment.

6. Versatility and Adaptability:

Steel ball bearings are available in various configurations, sizes, and designs, making them versatile and adaptable to different applications. Manufacturers offer a wide range of bearing types, such as deep groove ball bearings, angular contact ball bearings, and thrust ball bearings, to suit specific requirements. This versatility allows machinery and equipment designers to select the most appropriate steel ball bearings based on factors such as load capacity, speed, space limitations, and operating conditions. The ability to choose from a diverse range of steel ball bearing options ensures optimal performance and functionality in different industrial sectors.

7. Maintenance and Serviceability:

Steel ball bearings simplify maintenance and serviceability of machinery and equipment. Their durability and resistance to wear minimize the need for frequent maintenance or replacement. Additionally, steel ball bearings can be easily accessed, inspected, and replaced when necessary, reducing downtime and maximizing operational efficiency. Proper lubrication and periodic maintenance of the bearings help ensure their long-term performance and extend the service life of the machinery and equipment.

By enhancing efficiency, reducing friction, enabling high-speed operation, providing precision and accuracy, reducing vibration and noise, offering versatility and adaptability, and simplifying maintenance, steel ball bearings contribute significantly to the overall efficiency and functionality of machinery and equipment in various industries.

steel ball bearing

Can you explain the installation and alignment considerations for steel ball bearings?

Proper installation and alignment are critical for the optimal performance and longevity of steel ball bearings. Let’s explore the key considerations for installing and aligning these bearings:

1. Cleanliness:

Prior to installation, it is essential to ensure that the bearing housing, shaft, and surrounding components are clean and free from dirt, debris, and contaminants. Any particles or impurities can affect the bearing’s performance and cause premature wear or damage. Cleaning the surfaces thoroughly and using appropriate cleaning agents or solvents is recommended.

2. Shaft and Housing Tolerances:

Steel ball bearings require precise shaft and housing tolerances for proper fit and alignment. It is crucial to follow the manufacturer’s specifications and guidelines for the recommended tolerance range. Excessive clearance or interference can lead to improper load distribution, increased friction, and premature failure of the bearing.

3. Bearing Handling:

When handling steel ball bearings, care should be taken to avoid dropping or impacting the bearing. Rough handling can cause damage to the balls, raceways, or cage, compromising the bearing’s performance. It is advisable to use clean gloves and suitable tools to prevent contamination or accidental damage during the installation process.

4. Mounting Methods:

There are various methods for mounting steel ball bearings, including press fitting, thermal expansion, and using mounting tools. The chosen method should be appropriate for the bearing size, type, and application. Applying force evenly and gradually while avoiding excessive pressure is crucial to prevent bearing distortions or misalignment during mounting.

5. Lubrication:

Prior to installation, the bearing should be properly lubricated with the recommended lubricant. Lubrication ensures smooth operation, reduces friction, and protects against premature wear. The appropriate quantity and type of lubricant should be applied according to the manufacturer’s instructions, taking into account factors such as speed, load, and operating conditions.

6. Bearing Alignment:

Proper alignment of steel ball bearings is essential for even load distribution and minimizing stress on the bearing components. Misalignment can lead to increased friction, vibration, and premature failure. Aligning the bearing with the shaft and housing using appropriate alignment tools or techniques, such as dial indicators or laser alignment systems, helps ensure optimal performance and longevity.

7. Preload and Clearance:

Depending on the application, preload or clearance adjustments may be necessary to achieve the desired performance. Preload refers to applying a slight internal axial load to eliminate internal clearance, while clearance allows for a certain level of axial or radial play. The appropriate preload or clearance should be determined based on the manufacturer’s recommendations and the specific operating conditions.

8. Post-Installation Checks:

After the bearing is installed, it is important to perform post-installation checks to verify proper alignment, smooth rotation, and absence of abnormal noise or vibration. These checks can involve verifying the bearing’s axial and radial runout, conducting visual inspections, and monitoring the bearing’s performance during the initial operation.

By considering these installation and alignment considerations for steel ball bearings, it is possible to ensure the correct fit, alignment, and performance of the bearings. Proper installation and alignment contribute to reduced friction, extended bearing life, and reliable operation in various industrial applications.

steel ball bearing

How do steel ball bearings contribute to reduced friction and smooth operation in machinery?

Steel ball bearings play a critical role in reducing friction and ensuring smooth operation in various machinery and mechanical systems. Let’s explore how steel ball bearings achieve these benefits:

1. Rolling Motion: Steel ball bearings operate on the principle of rolling motion. The small spherical balls within the bearing roll between the inner and outer raceways, rather than sliding against each other. This rolling motion significantly reduces friction compared to sliding friction that occurs in plain bearings or bushings. As a result, steel ball bearings minimize energy losses due to friction and enable more efficient operation of machinery.

2. Point Contact: Steel ball bearings feature point contact between the balls and the raceways. This means that only a small area of the ball is in contact with the raceway at any given time. Point contact reduces the contact surface area and, consequently, the frictional resistance. The reduced friction allows the bearing to rotate more freely and with minimal energy loss.

3. Lubrication: Proper lubrication is crucial for the smooth operation of steel ball bearings. Lubricants such as grease or oil are used to reduce friction and wear between the balls and the raceways. Lubrication forms a thin film between the contacting surfaces, providing a barrier that prevents direct metal-to-metal contact. This lubricating film further reduces friction and dissipates heat, improving the overall performance and longevity of the bearing.

4. Precision Manufacturing: Steel ball bearings are manufactured with high precision and tight tolerances. The dimensions, roundness, and surface finish of the balls and raceways are carefully controlled during the manufacturing process. This precision ensures that the balls roll smoothly and with minimal resistance within the bearing. The precise fit between the balls and the raceways contributes to reduced friction and promotes smooth operation.

5. Material Properties: Steel ball bearings are typically made from high-quality steel alloys that exhibit excellent mechanical properties. The steel used in ball bearings is hardened and heat-treated to enhance its strength, durability, and resistance to wear. These material properties allow the bearings to withstand high loads and provide reliable performance over extended periods. The smooth and hard surface of the steel balls also reduces friction and wear between the balls and the raceways.

6. Cage or Retainer: In many steel ball bearings, a cage or retainer is used to separate and maintain proper spacing between the balls. The cage prevents the balls from touching or rubbing against each other, ensuring smooth rolling motion. It also helps to distribute the load evenly among the balls, reducing stress concentrations and minimizing frictional resistance.

7. Noise and Vibration Reduction: Steel ball bearings contribute to the reduction of noise and vibration in machinery. The rolling motion of the balls and the precise fit between the balls and raceways minimize the occurrence of undesirable vibrations and noise generated by friction. This is particularly important in applications where quiet operation is essential, such as in precision machinery or automotive components.

In summary, steel ball bearings reduce friction and enable smooth operation in machinery through rolling motion, point contact, proper lubrication, precision manufacturing, high-quality materials, the use of cages or retainers, and noise/vibration reduction. These factors combined make steel ball bearings essential components in a wide range of applications, contributing to improved efficiency, durability, and performance of machinery and mechanical systems.

China best Spare Parts Stainless Steel Bearings 698 Zz 2RS Deep Groove Ball Bearing Radial Spherical Plain Bearing Slewing Bearing 1688   with Hot sellingChina best Spare Parts Stainless Steel Bearings 698 Zz 2RS Deep Groove Ball Bearing Radial Spherical Plain Bearing Slewing Bearing 1688   with Hot selling
editor by CX 2024-02-21

Steel Ball Bearings

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