Contact Platform Support
Help CenterIndustrial Bearing 6308, 40mm Bore, Deep Groove, Standard Compliant for Mining Equipment
Product Spotlights
Related Products
-
Machinery Bearing 6000 Series, 25mm Bore, C3 Clearance for High-Speed Industrial ConveyorsNegotiableMOQ: 1 Piece -
Auto Bearing With 6205 2RS Dimensions, 440C Stainless Steel for Automotive Chassis SystemsNegotiableMOQ: 1 Piece
-
Machinery Bearing for Textile Spinning Machines, 6204-2RS, High Speed With 12000 RPMNegotiableMOQ: 1 Piece
-
Auto Bearing Used for Electric Vehicle Drive Motors, 12mm Width, Low Noise OperationNegotiableMOQ: 1 Piece
-
Machinery Bearing, 6205-2Z, 25mm Bore, Free Technical Support and Installation GuideNegotiableMOQ: 1 Piece
Industrial Bearing 6308 – 40mm Bore Deep Groove for Mining Equipment
Henan San Kuang Machinery Technology Co., Ltd., established in 2014 with a factory spanning 10,000–30,000 square meters and a team of 51–100 skilled employees, is proud to offer the Industrial Bearing 6308 with a 40mm bore. Designed specifically for demanding mining applications, this deep groove ball bearing combines robust construction, precise engineering, and standard compliance to deliver reliable performance under heavy loads and harsh environments. Our commitment to quality is backed by multiple certifications including ISO9001, ISO14000, and OHSAS18001, ensuring that every bearing meets rigorous international standards.
Key Features & Benefits
- Deep Groove Design: Accommodates radial and moderate axial loads in both directions, ideal for high-speed rotating equipment in mining.
- 40mm Bore Diameter: Standard size (6308) compatible with common shafts, simplifying replacement and maintenance.
- Premium Chrome Steel: Manufactured from GCr15 bearing steel with high hardness and wear resistance, extending service life.
- Optional Seals: Available in open, rubber seal (2RS), or metal shield (ZZ) variants to protect against dust, moisture, and debris.
- Precision & Clearance Options: Offered in P0 or P6 precision grades and C0 or C3 internal clearance to suit specific operating conditions.
- Standard Compliant: Conforms to ISO and DIN standards, ensuring interchangeability and global acceptance.
- Low Noise & Vibration: Optimized cage design and raceway finishing reduce operational noise, enhancing worker safety.
- Wide Temperature Range: Operates effectively from -30°C to +120°C, suitable for underground and surface mining environments.
Technical Specifications
| Parameter | Value |
| Bore Diameter (d) | 40 mm |
| Outer Diameter (D) | 90 mm |
| Width (B) | 23 mm |
| Dynamic Load Rating (Cr) | 40.5 kN |
| Static Load Rating (Cor) | 24.0 kN |
| Limiting Speed (Grease) | 8,500 rpm |
| Limiting Speed (Oil) | 10,000 rpm |
| Weight | 0.63 kg (approx.) |
| Material | Chrome Steel (GCr15) |
| Cage Material | Steel (standard) / Brass (optional) |
| Seal Type | Open, ZZ (metal shield), 2RS (rubber seal) – customizable |
| Standards | ISO 15, DIN 625, JIS B1513 |
Application in Mining Equipment
This bearing is extensively used in mining machinery such as conveyor belt rollers, vibrating screens, crushers, ball mills, and gearboxes. Its deep groove geometry ensures stable operation under continuous heavy loads and moderate shock loads. The optional seals keep lubricants in and contaminants out, critical for dusty and wet mine conditions. With multiple clearance and precision options, the 6308 bearing can be tailored to specific shaft fits and operating temperatures, reducing downtime and maintenance costs.
Why Choose Henan San Kuang?
With an annual export value between US$2.5 Million and US$5 Million, Henan San Kuang Machinery Technology Co., Ltd. serves clients across North America, South America, Europe, Southeast Asia, Africa, Oceania, the Middle East, and Asia. Our factory is equipped with advanced production lines and testing facilities, ensuring consistent quality. We hold certifications including ISO9001, ISO14000, OHSAS18001, TS16969, and many more (please refer to our certificate list). All bearings are shipped from major ports such as Shanghai, Lianyungang, Qingdao, and Tianjin, with reliable logistics support.
We are committed to providing standard compliant, durable, and cost-effective bearing solutions for the mining industry. Our technical team can assist in selecting the right variant for your application. Contact us today for a quote or sample inspection. Let Henan San Kuang be your trusted partner in powering mining operations worldwide.
Frequently Asked Questions (FAQ)
-
Q: What is the exact bore size of the 6308 bearing?
A: The bore diameter is 40 mm (1.5748 inches), matching standard 6308 series dimensions. -
Q: Can this bearing be used in high-temperature environments?
A: Yes, it operates effectively from -30°C to +120°C. For higher temperatures, special heat-stabilized materials are available upon request. -
Q: What seal options are available?
A: We offer open (no seal), ZZ (metal shield on both sides), and 2RS (rubber seal on both sides). Custom seals can be discussed. -
Q: Is the 6308 bearing interchangeable with other brands?
A: Yes, it conforms to ISO and DIN standards, ensuring direct interchangeability with major brands like SKF, FAG, NSK, etc. -
Q: Do you provide samples before bulk order?
A: Yes, sample orders are welcome. We can supply a few pieces for testing and evaluation. -
Q: What is the typical lead time for bulk orders?
A: For stock sizes, lead time is 7–15 days. For customized variants, it may be 20–30 days depending on quantity. -
Q: Which precision grades are available?
A: Standard is P0 (ABEC 1). P6 (ABEC 3) is optional. Higher grades like P5 or P4 are available upon request. -
Q: How do you ensure quality control?
A: We follow ISO9001:2015 quality management system, performing 100% dimensional inspection, noise testing, and fatigue life sampling.
Send Inquiry to This Supplier
You May Also Like
-
Machinery Bearing NJ2206, 30mm ID, Cylindrical Roller, 1.5mm Precision for GearboxesNegotiableMOQ: 1 Piece
-
Tapered Roller Bearing 30208, Single Row, Heavy‑duty Agricultural Machinery Roller BearingNegotiableMOQ: 1 Piece
-
Cylindrical Roller Bearing NU2208, Open Type, Chrome Steel, Gearbox Industrial Roller BearingNegotiableMOQ: 1 Piece
-
Thrust Ball Bearing 51208, Axial Load Bearing for Heavy‑duty Mechanical EquipmentNegotiableMOQ: 1 Piece
-
Stainless Steel Deep Groove Ball Bearing 6004 2RS, Corrosion Resistant Mini Industrial BearingNegotiableMOQ: 1 Piece
-
Angular Contact Ball Bearing 7206 AC, P6 Precision, High Speed Machine Tool BearingNegotiableMOQ: 1 Piece
-
Needle Roller Bearing NA4905, High Load Compact Size Mechanical Needle BearingNegotiableMOQ: 1 Piece
-
Spherical Roller Bearing 22310 CA/W33, Double Row, High Load Industrial Gearbox BearingNegotiableMOQ: 1 Piece
-
Self‑aligning Ball Bearing 1207, Double Row, Low Noise for Conveyor MachineryNegotiableMOQ: 1 Piece
-
Pillow Block Bearing UCP206, Cast Iron Housing, Insert Ball Bearing for Conveyor EquipmentNegotiableMOQ: 1 Piece
