Product Description


Company Profile

          ZheJiang Kangshi Precision Bearing Manufacturing Co., Ltd., located in Yandian Town Industrial Park, HangZhou City, ZheJiang Province, mainly produces zero deep groove ball bearings, 2 types of cylindrical roller bearings, 3 types of aligning roller bearings, 6 types of angular contact ball bearings, 7 types of tapered roller bearings, 8 types of thrust ball bearings, thrust bearings, 9 types of thrust aligning roller bearings, outer spherical bearings, auto parts, Motorcycle parts and other rolling bearings. Our factory has strong professional technology, good production equipment and perfect testing means, can fully meet the various types, specifications, high precision and special use requirements of bearing products customized processing, the production process of the product according to the strict national standards of enterprise internal control standards for the implementation of full inspection and multi-project comprehensive inspection of factory products, Can ensure the quality of each set of factory bearing products to meet national standards. Kangshi bearing has always implemented national standards, market prices, and implemented the “three guarantees” principle for customers: To ensure high-quality quality, preferential prices, superior after-sales service! Welcome customers at home and abroad to consult and negotiate business, the company will continue to win the trust of more customers with good product quality and reputation.

Product Description


Product Name Ball bearing Xihu (West Lake) Dis.r bearing Piliow bilock bearing Needle roller bearing Thrust ball bearing
Brand Name  KSA
Material Gcr15
Precision Grade P0,P6,P5
Certification ISO 9001
Packeage Box /Carton/Wooden Box/Plastic Tube or Per buyers requirement
MOQ Depending On Moedl
Serice OEM

Sample Available
Payment TT or L/C or Western Union
Port HangZhou  ZheJiang   HangZhou


Bearing Profile

Bearing Profile:

Type:Flat thrust ball bearing

Effect: The main role of thrust ball bearings is to withstand axial and radial loads, and can also withstand torque and tilt forces. Its ability to withstand axial load is relatively strong suitable for high speed operation and high precision requirements of mechanical equipment.

Exceptional Load Capacity: Our bearings are designed to handle heavy axial loads with ease, ensuring the reliable operation of your equipment even in the most demanding environments.

Precision Engineering: Crafted with precision and attention to detail, these bearings offer outstanding accuracy and minimal friction, contributing to the efficiency and longevity of your machines.

Reduced Downtime: With our Eight-Class Thrust Ball Bearings, you can count on reduced downtime and maintenance costs, allowing your business to stay productive and profitable.

Versatile Applications: Whether you’re in the automotive, aerospace, manufacturing, or any other

Old model(New model) Inside * outside * high Old model(New model) Inside * outside * high Old model(New model) Inside * outside * high
8100(51100) 10*24*9 8200(51200) 10*26*11 8304(51304) 20*47*18
8101(51101) 12*26*9 8201(51201) 12*28*11 8305(51305) 25*52*18
8102(51102) 15*28*9 8202(51202) 15*32*12 8306(51306) 30*60*21
8103(51103) 17*30*9 8203(51203) 17*35*12 8307(51307) 35*68*24
8104(51104) 20*35*10 8204(51204) 20*40*14 8308(51308) 40*78*26
8105(51105) 25*42*11 8205(51205) 25*47*15 8309(51309) 45*85*28
8106(51106) 30*47*11 8206(51206) 30*52*16 8310(51310) 50*95*31
8107(51107) 35*52*12 8207(51207) 35*62*18 8311(51311) 55*105*35
8108(51108) 40*60*13 8208(51208) 40*68*19 8312(51312) 60*110*35
8109(51109) 45*65*14 8209(51209) 45*73*20 8313(51313) 65*115*36
8110(51110) 50*70*14 8210(51210) 50*78*22 8314(51314) 70*125*40
8111(51111) 55*78*16 8211(51211) 55*90*25 8315(51315) 75*135*44
8112(51112) 60*85*17 8212(51212) 60*95*25 8316(51316) 80*140*44
8113(51113) 65*90*17 8213(51213) 65*100*27 8317(51317) 85*150*49
8114(51114) 70*95*18 8214(51214) 70*105*27 8318(51318) 90*155*50
8115(51115) 75*100*19 8215(51215) 75*110*27 8320(51320) 100*170*55
8116(51116) 80*105*19 8216(51216) 80*115*28 8322(51322) 110*190*63
8117(51117) 85*110*19 8217(51217) 85*125*31 8324(51324) 120*210*70
8118(51118) 90*120*22 8218(51218) 90*135*35 8326(51326) 130*225*75
8120(51120) 100*130*25 8220(51220) 100*150*38 8328(51328) 140*240*80
8122(51122) 110*145*25 8222(51222) 110*160*38 8330(51330) 150*250*80
8124(51124) 120*155*25 8224(51224) 120*170*39 8332(51332) 160*270*87
8126(51126) 130*170*30 8226(51226) 130*190*45 8334(51334) 170*280*87
8128(51128) 140*180*31 8228(51228) 140*200*46 8336(51336) 180*300*95
8130(51130) 150*190*31 8230(51230) 150*215*50 8338(51338) 190*320*105
8132(51132) 160*200*31 8232(51232) 160*225*51 8340(51340) 200*340*110
8134(51134) 170*215*34 8234(51234) 170*240*55 8344(51344) 220*360*112
8136(51136) 180*225*34 8236(51236) 180*250*56 8348(51348) 240*380*112
8138(51138) 190*240*37 8238(51238) 190*270*62    
8140(51140) 200*250*37 8240(51240) 200*280*62 8405(51405) 25*60*24
8144(51144) 220*270*37 8244(51244) 220*300*63 8406(51406) 30*70*28
8148(51148) 240*300*45 8248(51248) 240*340*78 8407(51407) 35*80*32
8152(51152) 260*320*45 8252(51252) 260*360*79 8408(51408) 40*90*36
8156(51156) 280*350*53 8256(51256) 280*380*90 8409(51409) 45*100*39
8160(51160) 300*380*62 8260(51260) 300*420*95 8410(51410) 50*110*43
8164(51164) 320*400*63 8264(51264) 320*440*95 8411(51411) 55*120*48
8168(51168) 340*420*64 8268(51268) 340*460*96 8412(51412) 60*130*51
8172(51172) 360*440*65 8272(51272) 360*500*110 8413(51413) 65*140*56
8180(51180) 400*480*65 8276(51276) 380*520*112 8414(51414) 70*150*60
8184(51184) 420*500*65 8280(51280) 400*540*112 8415(51415) 75*160*65
8188(51188) 440*540*80     8416(51416) 80*170*68
8192(51192) 460*560*80     8417(51417) 85*180*72
8196(51196) 480*580*80     8418(51418) 90*190*77
        8420(51420) 100*210*85
        8422(51422) 110*230*95
        8424(51424) 120*250*102
        8426(51426) 130*270*110
        8428(51428) 140*280*112
        8430(51430) 150*300*120
        8436(51436) 180*360*140

Company strength

Company strength:

Stock supply Complete model Timely delivery

1.The main production thrust ball bearing thrust roller bearing needle bearing tapered roller bearing deep groove ball bearing outer spherical bearings and other products

2.implemented the “three guarantees” principle for customers: To ensure high-quality quality, preferential prices, superior after-sales service!

3.The company has bearing production plant, complete inventory supply, complete models, timely delivery, thoughtful after-sales service, reasonable price, welcome to negotiate


Our Advantages

Our Advantage:
1.Our products: with high quality, long life, high speed, low noise, low friction quality products

2. We have: sufficient storage space, sufficient inventory, high production efficiency, we provide customers with the most favorable prices

3. Chinese bearing: in China’s production line, products are exported to all over the world, product specifications are complete, certificates are complete, professional R & D team

4. After-sales service and technical guidance: The company provides after-sales service and technical guidance according to customer requirements and needs



Q: What is the MOQ?
A: It depends on the bearing type. You can send inquiry or send e-mail for more information.
Q: How about the package?
A: Industrial packing in general condition (Plastic drums/boxes/industrial packaging + cartons + pallets). Accept design package when OEM.
Q: How long is the delivery time?
A: It will take about 10 to 40 days, depends on the model and quantity.
Q:What are the advantages of your company’s services compared to other companies?
A: Factory direct supply, price advantage, 24 hours online timely reply, Provide customers with customs clearance 
and quality of various documents, 100% after-sales service
A:We can printing your brand (logo,artwork)on the bearings or laser engraving your brand on the bearings.
    We can custom your packaging according to your design All copyright own by clients and we  promised  don’t 
    disclose any info.
Q:How to contact us quickly?
A:Please send us an inquiry or message and leave your other contact information, such as phone number,
     account or account, we will contact you as soon as possible and provide the detailed information
 you need.

             Please feel free to contact us, if you have any other question

/* January 22, 2571 19:08:37 */!function(){function s(e,r){var a,o={};try{e&&e.split(“,”).forEach(function(e,t){e&&(a=e.match(/(.*?):(.*)$/))&&1

Quality: High Precision
Noise: No
Service Life: Long
US$ 4.18/Piece
1 Piece(Min.Order)


Order Sample



Customized Request

.shipping-cost-tm .tm-status-off{background: none;padding:0;color: #1470cc}

Shipping Cost:

Estimated freight per unit.

about shipping cost and estimated delivery time.
Payment Method:


Initial Payment

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

steel ball bearing

Can you describe the various types of seals and shields used with steel ball bearings for contamination prevention?

Steel ball bearings are often equipped with seals and shields to prevent contamination from entering the bearing and affecting its performance. These protective components act as barriers, keeping out solid particles, liquids, and other contaminants that could lead to premature wear, corrosion, or damage. Here are some of the common types of seals and shields used with steel ball bearings for contamination prevention:

1. Rubber Seals:

Rubber seals, also known as contact seals or lip seals, are widely used to provide effective contamination protection for steel ball bearings. These seals are typically made of synthetic rubber materials, such as nitrile rubber (NBR) or fluoroelastomer (FKM). Rubber seals are designed to have direct contact with the bearing inner and outer rings, creating a physical barrier against contaminants. They form a tight seal around the rotating inner ring, preventing the ingress of dust, dirt, moisture, and other particles. Rubber seals offer good sealing performance and are effective in most operating conditions.

2. Metal Shields:

Metal shields, also known as non-contact shields or metal covers, are metallic components that provide contamination protection for steel ball bearings. These shields are typically made of steel or stainless steel and feature a circular shape that covers the bearing opening. Metal shields do not come into direct contact with the bearing rings but provide a physical barrier against larger particles and debris. They are designed with a small gap between the shield and the inner ring, allowing for minimal friction and unrestricted rotation. Metal shields are commonly used in applications where low torque and high-speed operation are required.

3. Felt Seals:

Felt seals are simple and cost-effective sealing components used with steel ball bearings. These seals are made from compressed or impregnated felt material. Felt seals can be installed in the outer ring of the bearing to create a barrier against dust and small particles. While they provide limited protection against liquid contaminants, felt seals are effective in preventing the ingress of solid particles. Felt seals are commonly used in applications where moderate contamination protection is required, and the operating conditions are not excessively demanding.

4. Labyrinth Seals:

Labyrinth seals are non-contact seals that use a complex, tortuous path to prevent contaminants from entering the bearing. They consist of multiple interlocking grooves or ridges on the bearing housing and the seal itself. The labyrinth design creates a series of barriers that impede the entry of particles and fluids. Labyrinth seals are effective in providing contamination protection in applications where high-speed rotation, heavy contamination, or exposure to liquids is a concern. They offer low friction and can withstand challenging operating conditions.

5. Combination Seals and Shields:

In some cases, steel ball bearings may be equipped with combination seals and shields to provide enhanced contamination protection. These hybrid sealing arrangements combine the benefits of both seals and shields to provide a higher level of defense against contaminants. For example, a bearing may feature a rubber seal on one side to provide excellent sealing performance, while having a metal shield on the other side to allow for lower friction and higher speed operation. Combination seals and shields offer versatility and can be tailored to specific application requirements.

6. Customized Sealing Solutions:

Depending on the specific application and operating conditions, customized sealing solutions may be developed for steel ball bearings. These solutions can involve the use of specialized materials, unique designs, or additional protective features. Customized seals and shields are typically designed to address specific challenges, such as extreme temperatures, aggressive chemicals, high-pressure environments, or stringent cleanliness requirements. Manufacturers and bearing suppliers can work with customers to develop tailored sealing solutions that provide optimal contamination prevention for their specific applications.

Seals and shields play a critical role in preventing contamination and maintaining the performance and service life of steel ball bearings. The choice of the appropriate seal or shield depends on factors such as the operating environment, speed, load, and level of contamination risk. By effectively preventing the ingress of contaminants, these protective components help ensure the reliable and efficient operation of machinery and equipment.

steel ball bearing

Can steel ball bearings be customized or modified for unique industrial needs?

Yes, steel ball bearings can be customized or modified to meet unique industrial needs. Manufacturers offer various options for customization and modification to ensure that the bearings align with specific requirements. Let’s explore some of the ways steel ball bearings can be customized:

1. Bearing Size and Configuration:

Steel ball bearings can be customized in terms of size, including the outer diameter, inner diameter, and width. Manufacturers can produce bearings in a wide range of sizes to accommodate different shaft and housing dimensions. Additionally, the configuration of the bearing, such as the number and arrangement of balls, can be modified to optimize load capacity, speed, or specific operating conditions.

2. Material Selection:

While steel is the most common material used for ball bearings, there are different types of steel with varying properties. Manufacturers can offer customized steel ball bearings made from specific grades of steel to enhance performance characteristics such as corrosion resistance, high-temperature resistance, or hardness. In some cases, alternative materials such as stainless steel or specialty alloys may be used to meet unique industrial requirements.

3. Seal or Shield Options:

Bearings can be customized with different seal or shield options to provide enhanced protection against contamination, moisture, or chemicals. Manufacturers can offer various sealing configurations, such as rubber seals, metal shields, or labyrinth seals, to suit specific environmental conditions and prevent the ingress of particles or fluids into the bearing. Customized sealing solutions can help prolong bearing life and improve reliability in challenging industrial environments.

4. Lubrication:

The lubrication of steel ball bearings can be customized based on the specific application requirements. Manufacturers can offer a range of lubrication options, including different types of lubricants and greases with varying viscosities, additives, or properties. Customized lubrication solutions ensure optimal performance, reduce friction, and enhance the bearing’s ability to withstand high temperatures, extreme loads, or harsh operating conditions.

5. Cage Design:

The cage, or retainer, holds the balls in position within the bearing and ensures proper ball guidance and spacing. Steel ball bearings can be customized with different cage designs, materials, or configurations. For example, cages can be made from steel, brass, or engineered polymers, each offering specific advantages such as improved heat dissipation, reduced friction, or enhanced durability. Customized cage designs can optimize the bearing’s performance in terms of speed, noise, or resistance to specific operating conditions.

6. Special Coatings or Surface Treatments:

In certain industries or applications, steel ball bearings may benefit from specialized coatings or surface treatments. These coatings can provide additional protection against corrosion, reduce friction, or enhance the bearing’s ability to withstand extreme temperatures or harsh chemicals. Customized coatings or surface treatments can be applied to the bearing’s outer surface, inner raceway, or balls to improve performance and extend the bearing’s lifespan.

7. Specialized Testing and Certification:

For industries with stringent quality or performance requirements, manufacturers can provide customized testing and certification services. This ensures that the steel ball bearings meet specific industry standards, regulations, or performance criteria. Customized testing may involve precision measurement, noise analysis, vibration testing, or endurance testing to verify the bearing’s performance and reliability in unique industrial applications.

By offering customization and modification options, manufacturers can tailor steel ball bearings to meet the unique needs of various industries, applications, and operating conditions. Customized bearings can deliver improved performance, durability, and reliability, ultimately enhancing the overall efficiency and productivity of industrial systems.

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 supplier 51200 Series Thrust Ball/China Wholesale/Engine/Motorcycle/Tractor/Wheel//Linear Guide/China Wholesale/Steel Ball/Diesel Generator Sets/Auto/Gear/1688 Bearing   bearing engineeringChina supplier 51200 Series Thrust Ball/China Wholesale/Engine/Motorcycle/Tractor/Wheel//Linear Guide/China Wholesale/Steel Ball/Diesel Generator Sets/Auto/Gear/1688 Bearing   bearing engineering
editor by CX 2024-03-27

Steel Ball Bearings

As one of the leading steel ball bearings manufacturers, suppliers, and exporters of mechanical products, We offer steel ball bearings and many other products.

Please get in touch with us for details.

Manufacturer supplier exporter of steel ball bearings.

Recent Posts