7310 Series High-capacity Angular Contact Ball Bearing | 10°–40° Contact Angle

• Tractor PTO Gearboxes
• Combine Harvester Drives

• Wind Turbine Gearbox (Mid-Speed Stage)
• Industrial Diesel Engine Accessories

• Shipboard Pump and Compressor Drives
• Winch and Crane Drives

• Mixer and Agitator Drive Shafts
• Crusher and Screen Machine Bearings

01. High Combined Load Capacity

With defined contact angles (15°, 25°, or 40°), the 7310 Series provides superior axial and radial load support compared to standard deep groove bearings, offering excellent shaft rigidity and stability in demanding applications.

02. Durable and Stable Performance

Manufactured from high-grade chrome steel and precision-ground to tight tolerances (available up to P5 precision grade), these bearings ensure smooth operation, low vibration, and long service life under continuous heavy-duty conditions.

03. Versatile Installation and Protection

Designed for single or paired mounting (back-to-back, face-to-face, or tandem) to optimize load handling and system stiffness. Available with open design, non-contact steel shields (ZZ), or contact rubber seals (2RS) to suit a wide range of environmental and lubrication conditions.

Interchange Part Numbers

Direct replacement for:

• SKF: 7310 C, 7310 AC, 7310 B
• NSK: 7310C, 7310AC
• FAG: 7310 C, 7310 AC
• NTN: 7310C, 7310AC

Design & Configuration

The 7310 Series is commonly supplied with an open design to facilitate specific lubrication regimes. Non-contact pressed steel shields (ZZ suffix) provide effective protection against coarse contaminants while maintaining low friction. For applications requiring a sealed, maintenance-free solution, contact rubber seals (2RS suffix) are available. The choice of contact angle, C (15°), AC (25°), or B (40°), allows engineers to tailor the bearing’s performance, prioritizing higher speed capability, balanced load/speed ratio, or maximum axial rigidity, respectively.

“For the input shafts of heavy-duty industrial gearboxes or the drive ends of large centrifugal pumps, the 7310 AC bearing provides an ideal combination of high load capacity, rigidity, and reliable long-term performance.”