Product Description
Product Description
Deep groove ball bearings are suitable for high-speed or even extremely high speed operation, and are very durable without frequent maintenance. This type of bearing has a low coefficient of friction, high limit speed, diverse size range and forms, and is widely used in industries such as precision instruments, low-noise motors, automobiles, motorcycles, and general machinery. It is the most widely used type of bearing in the mechanical industry. It mainly bears radial loads and can also withstand a certain amount of axial loads.
Detailed Photos
Product Parameters
| Bearing Model | Dimension | Basic Load rating (kN) |
Weight (kg) |
|||||||||||
| Standard type |
shield | seal | With snap ring groove |
With snap ring |
d | D | B | rsmin | D2 (max) |
F max | Cr | Cor | ||
| 635 | ZZ | 2RZ | 2RS | N | NR | 5 | 19 | 6 | 0.3 | – | – | 2.34 | 0.95 | 0.0080 |
| 636 | ZZ | 2RZ | 2RS | N | NR | 6 | 22 | 7 | 0.3 | – | – | 0.0134 | ||
| 637 | ZZ | 2RZ | 2RS | N | NR | 7 | – | – | – | – | – | – | ||
| 638 | ZZ | 2RZ | 2RS | N | NR | 8 | 28 | 9 | 0.3 | – | – | 0.5710 | ||
| 639 | ZZ | 2RZ | 2RS | N | NR | 9 | – | – | – | – | – | – | ||
| 6301 | ZZ | 2RZ | 2RS | N | NR | 12 | 37 | 12 | 1 | 41.3 | 1.12 | 9.70 | 4.20 | 0.060 |
| 6302 | ZZ | 2RZ | 2RS | N | NR | 15 | 42 | 13 | 1 | 46.3 | 1.12 | 11.4 | 5.40 | 0.082 |
| 6303 | ZZ | 2RZ | 2RS | N | NR | 17 | 47 | 14 | 1 | 52.7 | 1.12 | 13.5 | 6.55 | 0.115 |
| 6304 | ZZ | 2RZ | 2RS | N | NR | 20 | 52 | 15 | 1.1 | 57.9 | 1.12 | 15.9 | 7.80 | 0.141 |
| 6305 | ZZ | 2RZ | 2RS | N | NR | 25 | 62 | 17 | 1.1 | 67.7 | 1.7 | 22.5 | 11.6 | 0.219 |
| 6306 | ZZ | 2RZ | 2RS | N | NR | 30 | 72 | 19 | 1.1 | 78.6 | 1.7 | 28.1 | 16.0 | 0.350 |
| 6307 | ZZ | 2RZ | 2RS | N | NR | 35 | 80 | 21 | 1.5 | 86.6 | 1.7 | 33.2 | 19.0 | 0.454 |
| 6308 | ZZ | 2RZ | 2RS | N | NR | 40 | 90 | 23 | 1.5 | 96.5 | 2.46 | 31.4 | 22.4 | 0.639 |
| 6309 | ZZ | 2RZ | 2RS | N | NR | 45 | 100 | 25 | 1.5 | 106.5 | 2.46 | 52.7 | 31.5 | 0.836 |
| 6310 | ZZ | 2RZ | 2RS | N | NR | 50 | 110 | 27 | 2 | 116.6 | 2.46 | 61.8 | 38.0 | 1.05 |
| 6311 | ZZ | 2RZ | 2RS | N | NR | 55 | 120 | 29 | 2 | 129.7 | 2.82 | 71.5 | 45.0 | 1.35 |
| 6312 | ZZ | 2RZ | 2RS | N | NR | 60 | 130 | 31 | 2.1 | 139.7 | 2.82 | 81.9 | 52.0 | 1.70 |
| 6313 | ZZ | 2RZ | 2RS | N | NR | 65 | 140 | 33 | 2.1 | 149.7 | 2.82 | 92.3 | 60.0 | 2.10 |
| 6314 | ZZ | 2RZ | 2RS | N | NR | 70 | 150 | 35 | 2.1 | 159.7 | 2.82 | 104 | 68.0 | 2.50 |
| 6315 | ZZ | 2RZ | 2RS | N | NR | 75 | 160 | 37 | 2.1 | 169.7 | 2.82 | 114 | 76.5 | 3.00 |
| 6316 | ZZ | 2RZ | 2RS | N | NR | 80 | 170 | 39 | 2.1 | 182.9 | 3.1 | 124 | 86.5 | 3.60 |
| 6317 | ZZ | 2RZ | 2RS | N | NR | 85 | 180 | 41 | 3 | 192.9 | 3.1 | 133 | 96.5 | 4.25 |
| 6318 | ZZ | 2RZ | 2RS | N | NR | 90 | 190 | 43 | 3 | 202.9 | 3.1 | 143 | 108 | 4.90 |
| 6319 | ZZ | 2RZ | 2RS | N | NR | 95 | 200 | 45 | 3 | 212.9 | 3.1 | 153 | 119 | 5.75 |
| 6320 | ZZ | 2RZ | 2RS | N | NR | 100 | 215 | 47 | 3 | 227.8 | 3.1 | 174 | 140 | 7.00 |
| 6321 | ZZ | 2RZ | 2RS | N | NR | 105 | 225 | 49 | 3 | 237 | 3.5 | 182 | 153 | 8.25 |
| 6322 | ZZ | 2RZ | 2RS | N | NR | 110 | 240 | 50 | 3 | 252 | 3.5 | 205 | 178 | 9.54 |
| 6324 | ZZ | 2RZ | 2RS | – | — | 120 | 260 | 55 | 3 | — | – | 228 | 207 | 12.2 |
| 6326 | ZZ | 2RZ | 2RS | – | — | 130 | 280 | 58 | 4 | — | – | 229 | 216 | 18.0 |
| 6328 | ZZ | 2RZ | 2RS | – | — | 140 | 300 | 62 | 4 | — | – | 251 | 245 | 22.0 |
| 6330 | ZZ | 2RZ | 2RS | – | — | 150 | 320 | 65 | 4 | — | – | 274 | 284 | 22.7 |
| 6332 | ZZ | 2RZ | 2RS | – | — | 160 | 340 | 68 | 4 | — | – | 278 | 287 | 26.2 |
| 6334 | ZZ | 2RZ | 2RS | – | — | 170 | 360 | 72 | 4 | — | – | 325 | 355 | 36.6 |
| 6336 | ZZ | 2RZ | 2RS | – | — | 180 | 380 | 75 | 4 | — | – | 355 | 405 | 43.1 |
| 6338 | ZZ | 2RZ | 2RS | – | — | 190 | 400 | 78 | 5 | — | – | 355 | 415 | 49.7 |
| 6340 | ZZ | 2RZ | 2RS | – | — | 200 | 420 | 80 | 5 | — | – | 380 | 445 | 55.3 |
| 6344 | ZZ | 2RZ | 2RS | – | — | 220 | 460 | 88 | 5 | — | – | 410 | 520 | 73.9 |
| 6348 | ZZ | 2RZ | 2RS | – | — | 240 | 500 | 95 | 5 | — | – | 470 | 625 | 94.4 |
| 6352 | ZZ | 2RZ | 2RS | – | — | 260 | 540 | 102 | 6 | — | – | 505 | 710 | 118 |
| 6356 | ZZ | 2RZ | 2RS | – | — | 280 | 580 | 108 | 6 | — | – | 570 | 840 | 144 |
Packaging & Shipping
Company Profile
ZheJiang Boy Bearing Manufacturing Co., Ltd., established in 2015, is a professional bearing company that integrates bearing research and development, manufacturing, and sales. The company’s main products include deep groove ball bearings, tapered roller bearings, outer ball surface seat bearings, cylindrical roller bearings, spherical roller bearings, thrust ball bearings, as well as various non-standard sizes and special materials of bearings. The company adheres to the business philosophy of quality first and service first, and its products are exported to dozens of countries such as Russia, Poland, India, Iran, South Africa, etc. The boy bearings will be of high-end quality and competitive prices. We sincerely hope to cooperate with you for a CZPT situation!
Our Advantages
1. OEM or Non-Stand Bearings: Any requirement for Nonstandard bearings is Easily Fulfilled by us due to its vast knowledge.
2. Genuine products With Excellent Quality: The company has always proved the 100% quality products it provides with genuine intent.
3. After Sales Service and Technical Assistance: The company provides after-sales service and technical assistance as per the
customer’s requirements and needs.
4. Quick Delivery: The company provides just-in-time delivery with its streamlined supply chain.
We Will Give The Factory Wholesale Price
production process
FAQ
Q:What’s your after-sales service and warranty?
A: We promise to bear the following responsibilities when defective products were found:
1. Replacements would be sent with goods of your next order;
2. Refund for defective products if customers require.
Q:Do you accept ODM&OEM orders?
A: Yes, we provide ODM&OEM services to worldwide customers, we also customize OEM box and packing as your requirements.
Q:What’s the MOQ?
A: MOQ is 10pcs for standardized products; for customized products, MOQ should be negotiated in advance. There is no MOQ for sample orders.
Q:How long is the lead time?
A: The lead time for sample orders is 3-5 days, for bulk orders is 5-15 days.
Q:Do you offer free samples?
A: Yes we offer free samples to distributors and wholesalers, however customers should bear freight. We DO NOT offer free samples to end users.
Q:How to place order?
A: 1. Email us the model, brand and quantity,shipping way of bearings and we will quote our best price for you;
2. Proforma Invoice made and sent to you as the price agreed by both parts;
3. Deposit Payment after confirming the PI and we arrange production;
4. Balance paid before shipment or after copy of Bill of Loading.
/* 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(/(.*?):(.*)$/))&&1
| Price: | Factory Wholesale Price |
|---|---|
| Material Quality: | Bearing Steel |
| Number of Rows: | Single-Row |
| Service: | OEM ODM |
| Box: | We Will Provide Corresponding Packing According to |
| Model No.: | Main Product Deep Groove Ball Bearing |
| Samples: |
US$ 10/Set
1 Set(Min.Order) | |
|---|
| Customization: |
Available
| Customized Request |
|---|

Are there Specific Maintenance Practices to Ensure the Longevity of Ball Bearings?
Maintaining ball bearings is essential to ensure their longevity, reliable performance, and prevent premature failure. Proper maintenance practices can extend the lifespan of ball bearings and the equipment they are used in. Here are specific maintenance practices to consider:
- Regular Lubrication:
Implement a regular lubrication schedule using the appropriate lubricant for the application. Lubrication reduces friction, prevents wear, and helps dissipate heat. Follow manufacturer guidelines for lubricant type, quantity, and frequency.
- Clean Environment:
Keep the operating environment clean and free from contaminants. Dust, dirt, and debris can infiltrate bearings and cause damage. Use seals or shields to protect bearings from contaminants, especially in harsh environments.
- Proper Installation:
Ensure correct installation of bearings using proper tools and techniques. Improper installation can lead to misalignment, uneven load distribution, and premature wear. Follow manufacturer recommendations for installation procedures.
- Regular Inspections:
Perform routine visual inspections to check for signs of wear, damage, or contamination. Regular inspections can help identify issues early and prevent further damage. Pay attention to noise, vibration, and temperature changes.
- Temperature Monitoring:
Monitor bearing temperatures during operation using infrared thermometers or sensors. Abnormal temperature increases can indicate inadequate lubrication, misalignment, or other problems.
- Correct Handling:
Handle bearings with care to prevent damage during storage, transportation, and installation. Avoid dropping or subjecting them to impacts that can affect their internal components.
- Bearing Removal and Replacement:
Follow proper procedures when removing and replacing bearings. Use appropriate tools and techniques to avoid damage to the bearing or the surrounding components.
- Alignment Maintenance:
Maintain proper shaft and housing alignment to prevent excessive loads and wear on the bearing. Misalignment can lead to increased stress and premature failure.
- Training and Education:
Provide training to operators and maintenance personnel on proper bearing maintenance and handling practices. Educated personnel are more likely to identify issues and perform maintenance correctly.
- Documented Records:
Keep records of maintenance activities, inspections, lubrication schedules, and any issues encountered. This documentation helps track the bearing’s performance over time and informs future maintenance decisions.
By implementing these maintenance practices, you can ensure the longevity of ball bearings, minimize downtime, reduce operational costs, and maintain the reliability of the equipment they are a part of.

How do Temperature and Environmental Conditions Affect the Performance of Ball Bearings?
Temperature and environmental conditions have a significant impact on the performance and longevity of ball bearings. The operating environment can influence factors such as lubrication effectiveness, material properties, and overall bearing behavior. Here’s how temperature and environmental conditions affect ball bearing performance:
- Lubrication:
Temperature variations can affect the viscosity and flow characteristics of lubricants. Extreme temperatures can cause lubricants to become too thin or too thick, leading to inadequate lubrication and increased friction. In high-temperature environments, lubricants can degrade, reducing their effectiveness.
- Material Properties:
Temperature changes can alter the material properties of the bearing components. High temperatures can lead to thermal expansion, affecting bearing clearances and potentially causing interference between components. Extreme cold temperatures can make materials more brittle and prone to fracture.
- Clearance Changes:
Temperature fluctuations can cause changes in the internal clearance of ball bearings. For instance, at high temperatures, materials expand, leading to increased clearance. This can affect bearing performance, load distribution, and overall stability.
- Corrosion and Contamination:
Harsh environmental conditions, such as exposure to moisture, chemicals, or abrasive particles, can lead to corrosion and contamination of bearing components. Corrosion weakens the material, while contamination accelerates wear and reduces bearing life.
- Thermal Stress:
Rapid temperature changes can result in thermal stress within the bearing components. Differential expansion and contraction between the inner and outer rings can lead to stress and distortion, affecting precision and bearing integrity.
- Noise and Vibration:
Temperature-related changes in material properties and internal clearances can influence noise and vibration levels. Extreme temperatures can lead to increased noise generation and vibration, affecting the overall operation of machinery.
- Lubricant Degradation:
Environmental factors like humidity, dust, and contaminants can lead to premature lubricant degradation. Oxidation, moisture absorption, and the presence of foreign particles can compromise the lubricant’s performance and contribute to increased friction and wear.
- Seal Effectiveness:
Seals and shields that protect bearings from contaminants can be affected by temperature fluctuations. Extreme temperatures can lead to seal hardening, cracking, or deformation, compromising their effectiveness in preventing contamination.
- Choosing Appropriate Bearings:
When selecting ball bearings for specific applications, engineers must consider the expected temperature and environmental conditions. High-temperature bearings, bearings with specialized coatings, and those with enhanced sealing mechanisms may be necessary to ensure reliable performance.
Overall, understanding the impact of temperature and environmental conditions on ball bearing performance is crucial for proper bearing selection, maintenance, and ensuring optimal operation in diverse industries and applications.

Can you Explain the Various Types of Ball Bearings and their Specific Use Cases?
Ball bearings come in various types, each designed to meet specific application requirements. Here’s an overview of the different types of ball bearings and their specific use cases:
- Deep Groove Ball Bearings:
Deep groove ball bearings are the most common and versatile type. They have a deep raceway that allows them to handle both radial and axial loads. They are used in a wide range of applications, including electric motors, household appliances, automotive components, and industrial machinery.
- Angular Contact Ball Bearings:
Angular contact ball bearings have a contact angle that enables them to handle both radial and axial loads at specific angles. They are suitable for applications where combined loads or thrust loads need to be supported, such as in machine tool spindles, pumps, and agricultural equipment.
- Self-Aligning Ball Bearings:
Self-aligning ball bearings have two rows of balls and are designed to accommodate misalignment between the shaft and the housing. They are used in applications where shaft deflection or misalignment is common, such as conveyor systems, textile machinery, and paper mills.
- Thrust Ball Bearings:
Thrust ball bearings are designed to support axial loads in one direction. They are commonly used in applications where axial loads need to be supported, such as in automotive transmissions, steering systems, and crane hooks.
- Single-Row vs. Double-Row Bearings:
Single-row ball bearings have a single set of balls and are suitable for moderate load and speed applications. Double-row ball bearings have two sets of balls and offer higher load-carrying capacity. Double-row designs are used in applications such as machine tool spindles and printing presses.
- Miniature and Instrument Ball Bearings:
Miniature ball bearings are smaller in size and are used in applications with limited space and lower load requirements. They are commonly used in small electric motors, medical devices, and precision instruments.
- Max-Type and Conrad Bearings:
Max-type ball bearings have a larger number of balls to increase load-carrying capacity. Conrad bearings have fewer balls and are used in applications with moderate loads and speeds.
- High-Precision Ball Bearings:
High-precision ball bearings are designed for applications where accuracy and precision are critical, such as machine tool spindles, aerospace components, and optical instruments.
- High-Speed Ball Bearings:
High-speed ball bearings are engineered to minimize friction and accommodate rapid rotation. They are used in applications such as dental handpieces, turbochargers, and centrifuges.
In summary, the various types of ball bearings are tailored to different application requirements, including load type, direction, speed, and environmental conditions. Selecting the appropriate type of ball bearing ensures optimal performance and longevity in specific applications.


editor by CX 2024-03-06
China factory Best Selling Ball Bearings 6204 6206 6300 6301 6304 for Motorcycle Engine Parts Motorcycle Parts bearing bronze
Product Description
Best selling Ball bearings 6304 for motorcycle engine parts motorcycle parts
Introduction of HangZhou HangZhoung:
HangZhou HangZhoung Auto Parts Trading Co., Ltd. was established in 2009, located in Xihu (West Lake) Dis. District, HangZhou City, construction area of 3000 square meters, the existing domestic and foreign staff more than 200. The company mainly engaged in motorcycle parts, involving the sales of nearly 5000 parts of more than 30 models; It also owns 6 independent brands such as HangZhoung, Evocs, UFC, Maersk, CZPT and Hanchi. The company has set up offices in CZPT d’ivoire, Ghana and Burikina faso, and its products are sold to 7 countries in South America, Middle East, Africa and other regions.
HangZhou HangZhoung Overseas Company Profile:
HangZhoung Overseas Company was established in 2008. As the business platform of HangZhou HangZhoung motorcycle parts overseas sales, overseas companies undertake the responsibility of expanding the international market with their own brands. There are more than 160 Chinese and foreign employees. Accompanied by and with the pace of internationalization, overseas branch business has covered 16 markets such as west Africa, South America, the Middle East. At present, the company has set up overseas branches in Burkina Faso, CZPT d ‘Ivoireand Ghana, set up a motorcycle parts factory in Ouagadougou, purchased factory reserve land in West Africa, built a warehouse and purchased commercial land and industrial land in Burkina Faso.Since its establishment, the oversea company has always adhered to the concept of “charity has no boundaries, great love has no boundaries”, and has been committed to the local social welfare activities such as helping to build schools, assisting victims in disaster areas, etc. Therefore, the company has established a deep friendship with foreign customers and the local government, which has also laid a solid foundation for the company’s sustainable development.
Company Advantages
1,OEM service & owns 6 independent brands such as HangZhoung, Evocs, UFC, Maersk, CZPT and Hanchi.
2,Reliable& competitive price.
3,On time delivery & Reliable after-sales service.
4,Wide range of parts for more models available.
5,We have profession knowledge about Motorcycle parts ,more than 12 years experience in motorcycle parts.
| MODEL NO. | OUR MOTORCYCLE PRODUCTS | |||||||
| AX100 | Cylinder Head | Valve | Crankshaft | Piston Ring | Brake Shoes | Handle Switch | Spark Plug | Front Shock Absorber Pipe |
| BAJAJ100 | Cylinder Kit | Clutch | Camshaft | Wheel Hub | Brake Pad | Sprocket Kit | Ignition Coil | Rear Shock Absorber |
| CGL | Piston Kit | Motor | Clutch Plate | Side Mirror | Brake Cylinder | Speedometer | Lighting series | Front Shock Absorber |
| JY110 | Carburetor | Tyre | Timing Chain | Wheel Rim | Lock System | Chain | Fuel Tank | Transmission Shaft Assy |
FAQ
1. How to get the best price?
Re: The bulk order price can be negotiated.
We will quote the latest best price according to the customer final purchase list.
2.Can I get a sample to check your quality?
Re: Sure! For most product sample for free, but all other cost need to pay by customer.
Freight will be returned in first order.
3.What is your delivery time?
Re: Normally 30 working days
Generally speaking, we suggest that you start inquiry 1 months before the date you would like to get the products at your country.
4.What is your terms of packing?
Re:Generally, we pack our products in Our Brand Paper Carton Box. If you have legally registered patent,we can pack the products in your branded boxes after getting your authorization letters.
Thx for reading ours introduction. /* 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(/(.*?):(.*)$/))&&1
| Type: | Motorcycle Ball |
|---|---|
| Material: | Bearing Steel |
| Certification: | ISO9001:2001 |
| Samples: |
US$ 2.5/Piece
1 Piece(Min.Order) | Order Sample |
|---|
| Customization: |
Available
| 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. |
|---|

What are the Challenges Associated with Noise Reduction in Ball Bearings?
Noise reduction in ball bearings is a crucial consideration, especially in applications where noise levels must be minimized for operational efficiency and user comfort. While ball bearings are designed to operate smoothly, there are several challenges associated with reducing noise in their operation:
- Vibration:
Vibration generated by the movement of rolling elements and raceways can lead to noise. Even minor irregularities in bearing components or the mounting system can cause vibration that translates into audible noise.
- Bearing Type and Design:
The type and design of the ball bearing can impact noise generation. For example, deep groove ball bearings are known for their quiet operation, while angular contact bearings can generate more noise due to their higher contact angles.
- Lubrication:
Improper or inadequate lubrication can result in increased friction and wear, leading to noise. Choosing the right lubricant and maintaining proper lubrication levels are essential for reducing noise in ball bearings.
- Bearing Clearance and Preload:
Incorrect clearance or preload settings can lead to noise issues. Excessive clearance or inadequate preload can cause the rolling elements to impact the raceways, resulting in noise during rotation.
- Material and Manufacturing Quality:
The quality of materials and manufacturing processes can affect noise levels. Inconsistent or low-quality materials, improper heat treatment, or manufacturing defects can lead to noise generation during operation.
- Surface Finish:
The surface finish of the rolling elements and raceways can impact noise. Rough surfaces can generate more noise due to increased friction and potential irregularities.
- Sealing and Shielding:
Seals and shields that protect bearings can influence noise levels. While they are necessary for contamination prevention, they can also cause additional friction and generate noise.
- Operating Conditions:
External factors such as temperature, speed, and load can influence noise levels. High speeds or heavy loads can amplify noise due to increased stress on the bearing components.
- Wear and Deterioration:
As ball bearings wear over time, noise levels can increase. Worn components or inadequate lubrication can lead to more significant noise issues as the bearing operates.
To address these challenges and reduce noise in ball bearings, manufacturers and engineers employ various techniques, such as optimizing design, selecting suitable bearing types, using proper lubrication, maintaining accurate preload settings, and ensuring high-quality materials and manufacturing processes. Noise reduction efforts are essential to improve overall product quality, meet noise regulations, and enhance user experience in various applications.

What Precautions should be taken to Prevent Contamination of Ball Bearings in Industrial Settings?
Preventing contamination of ball bearings is essential to ensure their proper function, longevity, and overall performance in industrial settings. Contaminants such as dust, dirt, debris, and particles can significantly impact bearing operation. Here are important precautions to take to prevent contamination of ball bearings:
- Effective Sealing:
Choose ball bearings with appropriate seals or shields to prevent the ingress of contaminants. Seals provide a physical barrier against dust, moisture, and particles, ensuring the bearing’s interior remains clean.
- Clean Environment:
Maintain a clean working environment around the machinery and equipment. Regularly clean the surrounding areas to prevent the accumulation of dirt and debris that could enter the bearings.
- Proper Handling:
Handle bearings with clean hands and use gloves if necessary. Avoid touching the bearing surfaces with bare hands, as natural skin oils can transfer contaminants onto the bearing.
- Clean Tools and Equipment:
Use clean tools and equipment during installation and maintenance to prevent introducing contaminants. Ensure that tools are properly cleaned before coming into contact with the bearing components.
- Contamination-Controlled Workstations:
Establish contamination-controlled workstations for bearing handling, installation, and maintenance. These areas should have proper ventilation, filtered air, and minimal exposure to external contaminants.
- Proper Lubrication:
Use the correct lubricant in appropriate quantities. Lubricants help create a barrier against contaminants and reduce friction. Regularly inspect and replenish lubrication to maintain its effectiveness.
- Regular Inspections:
Implement a routine inspection schedule to monitor the condition of the bearings. Look for signs of contamination, wear, and damage. Address any issues promptly to prevent further damage.
- Training and Education:
Train personnel on proper handling, installation, and maintenance practices to minimize the risk of contamination. Educated employees are more likely to take precautions and prevent accidental contamination.
- Environmental Controls:
In sensitive environments, such as clean rooms or medical facilities, implement strict environmental controls to minimize the presence of contaminants that could affect bearing performance.
- Regular Cleaning and Maintenance:
Perform regular cleaning and maintenance of machinery and equipment to prevent the buildup of contaminants. Keep bearings protected during maintenance to prevent debris from entering during the process.
- Selection of Suitable Bearings:
Choose bearings that are specifically designed for the application’s environmental conditions. Some bearings have advanced sealing options or specialized coatings that enhance contamination resistance.
By implementing these precautions, industries can significantly reduce the risk of contamination in ball bearings, ensuring smooth operation, extended bearing life, and enhanced equipment reliability.

What are the Primary Benefits of Using Ball Bearings in Machinery and Equipment?
Ball bearings offer several primary benefits when used in machinery and equipment. Their design and functionality provide advantages that contribute to the efficient and reliable operation of various applications. Here are the key benefits:
- Reduced Friction:
One of the primary benefits of ball bearings is their ability to minimize friction between moving parts. The rolling motion of the balls reduces the contact area and sliding friction, leading to smoother operation and less energy loss due to frictional heating.
- Efficient Load Support:
Ball bearings are engineered to support both radial and axial loads, making them versatile for applications with multidirectional forces. This load-bearing capability allows machinery to handle different types of loads while maintaining performance and stability.
- Smooth Rotation:
Ball bearings enable smooth and precise rotational movement. The rolling motion of the balls provides consistent motion with minimal resistance, ensuring that machinery operates smoothly and without jerks.
- High-Speed Capability:
Due to their low friction and efficient rolling action, ball bearings are suitable for high-speed applications. They allow machinery and equipment to achieve and maintain high rotational speeds without excessive wear or heat buildup.
- Reduced Wear and Maintenance:
The reduced friction in ball bearings leads to lower wear on components. This results in longer service intervals and reduced maintenance requirements, saving both time and maintenance costs.
- Energy Efficiency:
By minimizing friction and reducing energy losses, ball bearings contribute to the overall energy efficiency of machinery. This is particularly important in applications where energy consumption is a concern.
- Versatility:
Ball bearings come in various types, sizes, and configurations, allowing them to be used in a wide range of machinery and equipment. They can be customized to suit specific application requirements.
- Reliability and Longevity:
Ball bearings are designed to withstand heavy loads and harsh operating conditions. Their durability and resistance to wear ensure reliable performance and an extended operational life.
- Quiet Operation:
Ball bearings contribute to quiet machinery operation due to the smooth rolling motion of the balls. This is particularly important in applications where noise reduction is a consideration.
In summary, the primary benefits of using ball bearings in machinery and equipment include reduced friction, efficient load support, smooth rotation, high-speed capability, reduced wear and maintenance, energy efficiency, versatility, reliability, and quiet operation. These benefits collectively enhance the performance and longevity of machinery across various industries.


editor by CX 2024-03-03
China Custom Motorcycle Spare Parts 6000 6200 6300 Ball bearings bearing block
Product Description
Ball bearings Series Motorcycle Spare Parts
Product Description
Deep groove bearing Specification
1.Bearing Factory more than 20 years
2.Own brand :F&D bearing ,CBB brand look for distributor and agents.
3.OEM Accepted.
4.ISO9001:2000. TS16949.
The type of high temperature bearings 6301 C2 Motorcycle Spare Parts Bearings component materials used will determine the life span, reliability and performance of the bearings. However, there are many factors affecting the performance of the bearings which include the selection of the load carrying capacity, the rolling contact conditions, and the cleanliness of the operating environment and the dimensional stability of the bearing components.
Detailed Photos
Product Parameters
Fuda bearing company has adopted the carbon-chromium steel material(Gcr15) in our productionof the bearing.
| Bearing No. | I.D | O.D | W | Loading Rating(KN) | Steel Ball Parameter | Max Speed | ||||||
| d | D | B | Dynamic | Static | No. | Size | Grease | Oil | ||||
| mm | inch | mm | inch | mm | inch | Cr | Cor | mm | r/min | r/min | ||
| 6000 | 10 | 0.3937 | 26 | 1.5716 | 8 | 0.3150 | 4.55 | 1.95 | 7 | 4.763 | 29000 | 34000 |
| 6001 | 12 | 0.4724 | 28 | 1.1571 | 8 | 0.3150 | 5.10 | 2.39 | 8 | 4.763 | 26000 | 30000 |
| 6002 | 15 | 0.5906 | 32 | 1.2598 | 9 | 0.3543 | 5.60 | 2.84 | 9 | 4.763 | 22000 | 26000 |
| 6003 | 17 | 0.6693 | 35 | 1.3780 | 10 | 0.3937 | 6.80 | 3.35 | 10 | 4.763 | 20000 | 24000 |
| 6004 | 20 | 0.7874 | 42 | 1.6535 | 12 | 0.4724 | 9.40 | 5.05 | 9 | 6.350 | 18000 | 21000 |
| 6005 | 25 | 0.9843 | 47 | 1.8504 | 12 | 0.4724 | 10.10 | 5.85 | 10 | 6.350 | 15000 | 18000 |
| 6006 | 30 | 1.1811 | 55 | 2.1654 | 13 | 0.5118 | 13.20 | 8.30 | 11 | 7.144 | 13000 | 15000 |
| 6007 | 35 | 1.3780 | 62 | 2.4409 | 14 | 0.5512 | 16.00 | 10.30 | 11 | 7.938 | 12000 | 14000 |
| 6008 | 40 | 1.5748 | 68 | 2.6772 | 15 | 0.5906 | 16.80 | 11.50 | 12 | 7.938 | 10000 | 12000 |
| 6009 | 45 | 1.7717 | 75 | 2.9528 | 16 | 0.6299 | 21.00 | 15.10 | 12 | 8.731 | 9200 | 11000 |
| 6571 | 50 | 1.9685 | 80 | 3.1496 | 16 | 0.6299 | 21.80 | 16.60 | 13 | 8.731 | 8400 | 9800 |
| 6011 | 55 | 2.1654 | 90 | 3.5433 | 18 | 0.7087 | 28.30 | 21.20 | 12 | 11.000 | 7700 | 9000 |
| 6012 | 60 | 2.3622 | 95 | 3.7402 | 18 | 0.7087 | 29.50 | 23.20 | 13 | 11.000 | 7000 | 8300 |
| 6013 | 65 | 2.5591 | 100 | 3.9370 | 18 | 0.7087 | 30.50 | 25.20 | 13 | 11.112 | 6500 | 7700 |
| 6014 | 70 | 2.7559 | 110 | 4.3307 | 20 | 0.7874 | 38.00 | 31.00 | 13 | 12.303 | 6100 | 7100 |
| 6015 | 75 | 2.9528 | 115 | 4.5276 | 20 | 0.7874 | 39.50 | 33.50 | 14 | 12.303 | 5700 | 6700 |
| 6016 | 80 | 3.1496 | 125 | 4.9213 | 22 | 0.8661 | 47.50 | 40.00 | 14 | 13.494 | 5300 | 6200 |
| Bearing No. | I.D | O.D | W | Loading Rating(KN) | Steel Ball Parameter | Max Speed | ||||||
| d | D | B | Dynamic | Static | No. | Size | Grease | Oil | ||||
| mm | inch | mm | inch | mm | inch | Cr | Cor | mm | r/min | r/min | ||
| 6200 | 10 | 0.3937 | 30 | 1.1811 | 9 | 0.3543 | 5.10 | 2.39 | 8 | 4.763 | 25000 | 30000 |
| 6201 | 12 | 0.4724 | 32 | 1.2598 | 10 | 0.3937 | 6.10 | 2.75 | 7 | 5.953 | 22000 | 26000 |
| 6202 | 15 | 0.5906 | 35 | 1.3780 | 11 | 0.4331 | 7.75 | 3.60 | 8 | 5.953 | 19000 | 23000 |
| 6203 | 17 | 0.6693 | 40 | 1.5748 | 12 | 0.4724 | 9.60 | 4.60 | 8 | 6.747 | 18000 | 21000 |
| 6204 | 20 | 0.7874 | 47 | 1.8504 | 14 | 0.5512 | 12.80 | 6.65 | 8 | 7.938 | 16000 | 18000 |
| 6205 | 25 | 0.9843 | 52 | 2.571 | 15 | 0.5906 | 14.00 | 7.85 | 9 | 7.938 | 13000 | 15000 |
| 6206 | 30 | 1.1811 | 62 | 2.4409 | 16 | 0.6299 | 19.50 | 11.30 | 9 | 9.525 | 11000 | 13000 |
| 6207 | 35 | 1.3780 | 72 | 2.8346 | 17 | 0.6693 | 25.70 | 15.30 | 9 | 11.112 | 9800 | 11000 |
| 6208 | 40 | 1.5748 | 80 | 3.1496 | 18 | 0.7087 | 29.10 | 17.80 | 9 | 12.000 | 8700 | 10000 |
| 6209 | 45 | 1.7717 | 85 | 3.3465 | 19 | 0.7480 | 32.50 | 20.40 | 10 | 12.000 | 7800 | 9200 |
| 6210 | 50 | 1.9685 | 90 | 3.5433 | 20 | 0.7874 | 35.00 | 23.20 | 10 | 12.700 | 7100 | 8300 |
| 6211 | 55 | 2.1654 | 100 | 3.9370 | 21 | 0.8268 | 43.50 | 29.20 | 10 | 14.288 | 6400 | 7600 |
| 6212 | 60 | 2.3622 | 110 | 4.3307 | 22 | 0.8661 | 52.50 | 36.00 | 10 | 15.081 | 6000 | 7000 |
| 6213 | 65 | 2.5591 | 120 | 4.7244 | 23 | 0.9055 | 57.50 | 40.00 | 10 | 16.669 | 5500 | 6500 |
| 6214 | 70 | 2.7559 | 125 | 4.9213 | 24 | 0.9449 | 62.00 | 44.00 | 11 | 16.462 | 5100 | 6000 |
| 6215 | 75 | 2.9528 | 130 | 5.1181 | 25 | 0.9843 | 66.00 | 49.50 | 11 | 17.462 | 4800 | 5600 |
| 6216 | 80 | 3.1496 | 140 | 5.5118 | 26 | 1.5716 | 72.50 | 53.00 | 11 | 18.256 | 4500 | 5300 |
| 6217 | 85 | 3.3465 | 150 | 5.9055 | 28 | 1.1571 | 83.50 | 64.00 | 11 | 19.844 | 4200 | 5000 |
| 6218 | 90 | 3.5433 | 160 | 6.2992 | 30 | 1.1811 | 96.00 | 71.50 | 10 | 22.225 | 4000 | 4700 |
| Bearing No. | I.D | O.D | W | Loading Rating(KN) | Steel Ball Parameter | Max Speed | ||||||
| d | D | B | Dynamic | Static | No. | Size | Grease | Oil | ||||
| mm | inch | mm | inch | mm | inch | Cr | Cor | mm | r/min | r/min | ||
| 6300 | 10 | 0.3937 | 35 | 1.3780 | 11 | 0.4331 | 8.20 | 3.50 | 6 | 7.144 | 23000 | 27000 |
| 6301 | 12 | 0.4724 | 37 | 1.4567 | 12 | 0.4724 | 9.70 | 4.20 | 6 | 7.938 | 20000 | 24000 |
| 6302 | 15 | 0.5906 | 42 | 1.6535 | 13 | 0.5118 | 11.40 | 5.45 | 7 | 7.938 | 17000 | 21000 |
| 6303 | 17 | 0.6693 | 47 | 1.8504 | 14 | 0.5512 | 13.50 | 6.55 | 7 | 8.731 | 16000 | 19000 |
| 6304 | 20 | 0.7874 | 52 | 2.571 | 15 | 0.5906 | 15.90 | 7.90 | 7 | 9.525 | 14000 | 27000 |
| 6305 | 25 | 0.9843 | 62 | 2.4409 | 17 | 0.6693 | 21.20 | 10.90 | 7 | 11.500 | 12000 | 14000 |
| 6306 | 30 | 1.1811 | 72 | 2.8346 | 19 | 0.7480 | 26.70 | 15.00 | 8 | 12.000 | 10000 | 12000 |
| 6307 | 35 | 1.3780 | 80 | 3.1496 | 21 | 0.8268 | 33.50 | 19.10 | 8 | 13.494 | 8800 | 10000 |
| 6308 | 40 | 1.5748 | 90 | 3.5433 | 23 | 0.9055 | 40.50 | 24.00 | 8 | 15.081 | 7800 | 9200 |
| 6309 | 45 | 1.7717 | 100 | 3.9370 | 25 | 0.9843 | 53.00 | 32.00 | 8 | 17.462 | 7000 | 8200 |
| 6310 | 50 | 1.9685 | 110 | 4.3307 | 27 | 1.0630 | 62.00 | 38.50 | 8 | 19.050 | 6400 | 7500 |
| 6311 | 55 | 2.1654 | 120 | 4.7244 | 29 | 1.1417 | 71.50 | 45.00 | 8 | 20.638 | 5800 | 6800 |
| 6312 | 60 | 2.3622 | 130 | 5.1181 | 31 | 1.2205 | 82.00 | 52.00 | 8 | 22.225 | 5400 | 6300 |
| 6313 | 65 | 2.5591 | 140 | 5.5118 | 33 | 1.2992 | 92.50 | 60.00 | 8 | 24.000 | 4900 | 5800 |
| 6314 | 70 | 2.7559 | 150 | 5.9055 | 35 | 1.3780 | 104.00 | 68.00 | 8 | 25.400 | 4600 | 5400 |
| 6315 | 75 | 2.9528 | 160 | 6.2992 | 37 | 1.4567 | 113.00 | 77.00 | 8 | 26.988 | 4300 | 5000 |
| 6316 | 80 | 3.1496 | 170 | 6.6929 | 39 | 1.5354 | 123.00 | 86.50 | 8 | 28.575 | 4000 | 4700 |
Packaging & Shipping for high temperature bearings 6301 C2 Motorcycle Spare Parts Bearings
| Packaging Detail | 1.Industrial Exporting Package with anti-tarnish paper/Carton/Pallet 2. Individual plastic/Carton/pallet 3. As the customers’ requirements |
| Delivery Detail | 30-45 days for normal order |
Installation Instructions
One of the leading bearing manufacturers and exporters in China
China CZPT Bearing Corporation was established in 1996 and is 1 of the leading bearing manufacturers and exporters in China. CZPT specializes in the design and production of high quality, high precision deep groove ball bearings and pillow block bearings. At present, the Corporation has more than 1,000 employees, a fixed assets of 1.05 billion yuan, and produces 250 million sets of bearings annually. In 2571, the Corporation achieved bearing sales of 650 million yuan. The Corporation’s products are widely used in more than 50 countries and regions under 2 independent brands, namely “F&D” and “FLATE”. Now CZPT created new brand “CBB”.
Research and Development
Since 2008, the Corporation has set up a Research & Development Center equipped with multiple laboratories used for precision measurement, mechanical testing, lifespan testing, and physicochemical testing, to continuously upgrade its skills and raise its manufacturing standard and product’s precision. Our workshops are installed with a series of advanced numerically-controlled, grinding and assembly equipment that utilize centralized filtration and cooling systems. Together with the production equipment suppliers, we developed these grinding, ultra-precision, fully automated integrated production lines, and own the intellectual property rights. The precision level of the products are at P5 level and above, with noise level CZPT Z4, V4 and above. Some of our projects have exceeded the 30% precision reserves. Our products are widely used in electric motors, automobiles, motorcycles, household appliances, textile, electric tools and water pump equipment industries, both locally and globally.
Why Choose US
About US
Fuda Bearing Corporation Co., Ltd. was founded in 1996, and became 1 of Chinese largest bearing manufacturers and exporters. which specializes in designing and producing deep groove ball bearings, pillow block bearings with high quality & precision. After more than 10 years’hard work, CZPT has developed into a high-tech company that is capable of bearing research & development, manufacturing, and marketing. The Corporation consists of 5 subsidiaries including ZHangZhoug CZPT Bearing Co., Ltd, Flate Precision Tech. Co.,Ltd, HangZhou Unit Machinery Co., Ltd, HangZhou Oyat Bearing Co.,Ltd, CZPT Bearing Corporation Imp.& Exp.Co.Ltd. Now CZPT has employees more than 1000 with the fixed assets of RMB 1.05 billion. And the annual production capacity can reach 25 million sets. In 2571, the bearing sales volume was RMB 650 millions.Besides it creates 2 self-owned brands called F&D and FLATE. The products are well received in more than 50 countries and regions.
Quality Assurance
Product quality is the lifeline of an enterprise. In order to possessing the leading technology, our company implements the quality control system and establishes a technical and strict inspection team. As per the regulation of three-dimensional management and multiple checks, each product was inspected by the producer, inspector, inspection department and quality department elaborately, especially to the important inspection items and precision inspection item.
Our Service
High quality, good credit and excellent service are the tenet of our company. Customers’satisfaction is our lifeline, as well as our highest honor. We will do our best to meet your requirements, and will do better in the future.
Our Trade Partner
CONTACT US
|
PENGQIAO INDUSTRIAL PARK HENGHE |
|
| Web: | fudabearing |
Thanks for reviewing Motorcycle Spare Parts Ball bearings !!!
|
Shipping Cost:
Estimated freight per unit. |
To be negotiated |
|---|
| After-sales Service: | 2 years |
|---|---|
| Warranty: | 2 years |
| Type: | Deep groove ball bearing |
| Samples: |
US$ 50/Piece
1 Piece(Min.Order) | Order Sample |
|---|
| Customization: |
Available
| Customized Request |
|---|

What is a Ball Bearing and How does it Function in Various Applications?
A ball bearing is a type of rolling-element bearing that uses balls to reduce friction between moving parts and support radial and axial loads. It consists of an outer ring, an inner ring, a set of balls, and a cage that separates and maintains a consistent spacing between the balls. Here’s how ball bearings function in various applications:
- Reduction of Friction:
Ball bearings function by replacing sliding friction with rolling friction. The smooth, spherical balls minimize the contact area between the inner and outer rings, resulting in lower friction and reduced heat generation.
- Radial and Axial Load Support:
Ball bearings are designed to support both radial loads (forces perpendicular to the shaft’s axis) and axial loads (forces parallel to the shaft’s axis). The distribution of balls within the bearing ensures load-carryi
What are the Materials Typically Used in Manufacturing Ball Bearings and Their Advantages?
Ball bearings are manufactured using a variety of materials, each chosen for its specific properties and advantages in various applications. Here are some commonly used materials in ball bearing manufacturing and their respective benefits:
- High-Carbon Chrome Steel (AISI 52100):
This is the most common material used for ball bearing manufacturing. It offers excellent hardness, wear resistance, and fatigue strength. High-carbon chrome steel bearings are suitable for a wide range of applications, from industrial machinery to automotive components.
- Stainless Steel (AISI 440C, AISI 304, AISI 316):
Stainless steel bearings are corrosion-resistant and suitable for applications where moisture, chemicals, or exposure to harsh environments are concerns. AISI 440C offers high hardness and corrosion resistance, while AISI 304 and AISI 316 provide good corrosion resistance and are often used in food and medical industries.
- Ceramic:
Ceramic bearings use silicon nitride (Si3N4) or zirconia (ZrO2) balls. Ceramic materials offer high stiffness, low density, and excellent resistance to corrosion and heat. Ceramic bearings are commonly used in high-speed and high-temperature applications, such as in aerospace and racing industries.
- Plastic (Polyamide, PEEK):
Plastic bearings are lightweight and offer good corrosion resistance. Polyamide bearings are commonly used due to their low friction and wear properties. Polyether ether ketone (PEEK) bearings provide high-temperature resistance and are suitable for demanding environments.
- Bronze:
Bronze bearings are often used in applications where self-lubrication is required. Bronze has good thermal conductivity and wear resistance. Bearings made from bronze are commonly used in machinery requiring frequent starts and stops.
- Hybrid Bearings:
Hybrid bearings combine steel rings with ceramic balls. These bearings offer a balance between the advantages of both materials, such as improved stiffness and reduced weight. Hybrid bearings are used in applications where high speeds and low friction are essential.
- Specialty Alloys:
For specific applications, specialty alloys may be used to meet unique requirements. For example, bearings used in extreme temperatures or corrosive environments may be made from materials like titanium or hastelloy.
- Coated Bearings:
Bearings may also be coated with thin layers of materials like diamond-like carbon (DLC) or other coatings to enhance performance, reduce friction, and improve wear resistance.
The choice of material depends on factors such as application requirements, operating conditions, load, speed, and environmental factors. Selecting the right material is essential for ensuring optimal bearing performance, longevity, and reliability in diverse industries and applications.
ng capacity in multiple directions.
- Smooth Rotational Movement:
Ball bearings facilitate smooth and precise rotational movement. The rolling motion of the balls allows for controlled and continuous rotation with minimal resistance.
- Applications in Machinery:
Ball bearings are used in a wide range of machinery and equipment, including motors, generators, gearboxes, conveyors, and fans. They enable the efficient transfer of motion while reducing wear and energy losses.
- Automotive Industry:
Ball bearings are extensively used in automobiles for various applications, including wheel hubs, transmission systems, steering mechanisms, and engine components. They provide reliability and durability in challenging automotive environments.
- Industrial Machinery:
In industr
What Role do Seals and Shields Play in Protecting Ball Bearings from Dirt and Debris?
Seals and shields are critical components of ball bearings that play a crucial role in protecting them from dirt, debris, moisture, and contaminants in various applications. These protective features help maintain the integrity of the bearing’s internal components and ensure reliable operation. Here’s how seals and shields contribute to bearing protection:
- Contaminant Exclusion:
Seals and shields create a physical barrier between the external environment and the bearing’s interior. They prevent dust, dirt, water, and other contaminants from entering the bearing and coming into contact with the rolling elements and raceways.
- Lubrication Retention:
Seals and shields help retain lubrication within the bearing. They prevent the lubricant from escaping and contaminants from entering, ensuring that the bearing remains properly lubricated for smooth operation and reduced friction.
- Corrosion Prevention:
Seals and shields protect bearing components from exposure to moisture and corrosive substances. By preventing moisture ingress, they help extend the bearing’s lifespan by minimizing the risk of corrosion-related damage.
- Extended Bearing Life:
Seals and shields contribute to the overall longevity of the bearing by reducing wear and damage caused by contaminants. They help maintain a clean internal environment, which promotes proper rolling contact and minimizes the risk of premature failure.
- Enhanced Performance in Harsh Environments:
In applications exposed to harsh conditions, such as outdoor machinery or industrial settings, seals and shields are vital. They protect bearings from abrasive particles, chemicals, and extreme temperatures, ensuring reliable performance despite challenging conditions.
- Noise and Vibration Reduction:
Seals and shields can help reduce noise and vibration generated by the bearing. They provide additional damping and stability, contributing to smoother operation and enhanced user comfort in noise-sensitive applications.
- Customized Protection:
Manufacturers offer a variety of seal and shield designs to suit different application requirements. Some seals provide higher levels of protection against contamination, while others are designed for high-speed or high-temperature environments.
- Trade-Offs:
While seals and shields offer significant benefits, they can also introduce some friction due to contact with the bearing’s inner or outer ring. Engineers must balance the level of protection with the desired operating characteristics, considering factors like friction, speed, and environmental conditions.
Overall, seals and shields play a vital role in maintaining the integrity and performance of ball bearings. By effectively preventing contaminants from entering and preserving lubrication, they ensure the smooth and reliable operation of machinery and equipment in a wide range of applications.
ial settings, ball bearings support rotating shafts and ensure the smooth operation of equipment such as pumps, compressors, and machine tools.
- High-Speed Applications:
Ball bearings are suitable for high-speed applications due to their low friction and ability to accommodate rapid rotation. They are used in applications like electric motors and aerospace components.
- Precision Instruments:
For precision instruments, such as watches, cameras, and medical devices, ball bearings provide accurate rotational movement and contribute to the overall performance of the instrument.
- Variety of Sizes and Types:
Ball bearings come in various sizes, configurations, and materials to suit different applications. Different types include deep groove ball bearings, angular contact ball bearings, thrust ball bearings, and more.
In summary, ball bearings are essential components in a wide range of applications where smooth rotation, load support, and reduced friction are critical. Their versatility, reliability, and efficiency make them indispensable in industries spanning from automotive to industrial machinery to precision instruments.


editor by CX 2023-08-29