Overview
The Fafnir 5308K C3 is a double-row angular contact ball bearing manufactured by Timken’s Fafnir division for critical industrial applications. With a 40 mm bore, 90 mm outside diameter, and 36.5 mm width, this bearing is engineered to handle combination radial and axial loading. The Fafnir 5308K delivers precision and durability in machinery requiring high rigidity and load capacity across automotive, aerospace, and industrial manufacturing sectors.
Key Features
- Double-Row Design: Specific geometry of angular contact bearing raceways and shoulders creates ball contact angles that support higher axial loads
- High Load Capacity: 14700 lb dynamic and 10400 lb static load ratings
- 20-Degree Contact Angle: Optimized for mixed load conditions
- Open Closure (No Shields): No seal, standard steel cage design
- Steel Ball Construction: Precision steel balls for reduced friction and consistent performance
- C3 Clearance: Standard internal clearance for general industrial use
Technical Specifications
5300 series medium Conrad angular contact ball bearing with the following verified specs:
- Bore Diameter (d): 40 mm (1.5748 in)
- Outside Diameter (D): 90 mm (3.5433 in)
- Width (B): 36.5 mm (1.437 in)
- Dynamic Load Rating: 14,700 lbf
- Static Load Rating: 10,400 lbf
- Contact Angle: 20 degrees
- Maximum Speed: 4,620 rpm
- Operating Temperature Range: -50 to 120°C
- Closure Type: Open (no shields)
- Cage Type: Steel or standard cage
- Weight: 2.557 lbf (0.981 kg)
Typical Applications
- Automotive: Wheel hubs, transmissions, and drive systems requiring precision and high-speed capability
- Aerospace: Mission-critical equipment where stringent quality and performance standards are non-negotiable
- Industrial Machinery: Manufacturing equipment, printing presses, and processing systems requiring combined radial and axial load support
- Precision Spindles: Machine tool spindles, pumps, and compressors operating at moderate to high speeds
Compatibility & Replacements
Compatible With
- Timken/Fafnir 5300 series bearing housings and shafts
- Industrial equipment designed for double-row angular contact bearings
- Equipment requiring 40 mm bore, 90 mm OD configuration
- Duplex mounting arrangements for maximum axial load capacity
Replaces / Drop-In Replacement For
- Fafnir 5308 C0 (same dimensions; verify clearance class compatibility)
- Other 5300 series double-row angular contact bearings with identical bore/OD
Works With
- Standard bearing mounting blocks and pillow blocks rated for 40 mm shaft
- Grease and oil lubrication systems (bearing is not pre-lubricated)
- Timken/Fafnir technical support and re-lubrication services
- Industrial maintenance and predictive monitoring equipment
