• Machine Tool Drives
• Agricultural Equipment & Tractors
• Conveyor Systems & Material Handling
• Textile Machinery & Spindles

• Centrifugal Pumps & Compressors
• Gearboxes & Power Transmission Units
• AC & DC Electric Motors (up to 5.5kW typical)
• Industrial Fans & Blowers

• Two & Three Wheeler Wheel Hubs
• Light Commercial Vehicle Components 
• Alternators & Starters
• Water Pumps

• Printing & Packaging Machines
• Industrial Pumps & Valves
• Construction Equipment
• Food Processing Machinery

01. Robust Construction & High Load Capacity

The 63 series medium-duty design features optimized internal geometry that delivers exceptional radial load capacity while accommodating moderate axial loads. With dynamic load ratings up to 45.5 kN and static load ratings up to 25.0 kN, the 6308 ensures long-term reliability under demanding operating conditions . Manufactured from high-quality chrome steel (GCr15 / SAE 52100), it provides superior wear resistance and fatigue life .

02. High-Speed & Smooth Operation

Manufactured to precision tolerances (PN/ABEC-1 standard, with P5/P6 grades available upon request) . The refined raceway finish, precision balls, and optimized internal clearances (CN/C3 available) deliver exceptionally smooth, quiet, and stable rotation with minimal vibration—perfect for continuous‑duty machinery and sensitive equipment .

03. Versatile Open Design for Flexible Lubrication

The open configuration allows users to select the optimal lubrication method for their specific application—whether grease or oil lubrication. This flexibility makes the 6308 suitable for a wide temperature range (-30°C to +120°C) and various operating environments . For applications requiring contamination protection, sealed or shielded variants (6308-2RS, 6308-ZZ) are also available.

Interchange Part Numbers

Direct replacement for:

• SKF: 6308
• NSK: 6308
• FAG: 6308
• NTN: 6308
• KOYO: 6308
• Timken: 6308

Design & Configuration

The 6308 open bearing is supplied without seals or shields as standard, allowing maximum flexibility for lubrication and cooling in high-speed applications . For environments requiring protection against contamination, the following variants are available:

• 6308-ZZ: Double metal shields for dust protection while maintaining low friction 

• 6308-2RS: Double rubber contact seals for enhanced protection against moisture and fine contaminants 

• 6308-C3: Increased radial internal clearance for applications with interference fits or temperature variations 

• 6308-ZNR: Shielded bearing with snap ring groove for simplified housing retention 

"For general purpose electric motors, pumps, and industrial gearboxes operating in clean environments, the 6308 open bearing provides optimal performance with customized lubrication."