Double Row Angular Contact Ball Bearing – 3311 ATN9/C3

The 3311 ATN9/C3 Double Row Angular Contact Ball Bearing is designed to efficiently handle high radial and axial loads while occupying less axial space compared to two single-row angular contact bearings. With a back-to-back (O) arrangement and a 30° contact angle, this bearing offers enhanced rigidity and stability, making it ideal for applications requiring a stiff bearing setup.

Engineered with SKF Explorer-class precision, it delivers high-speed capability, reduced friction, and excellent performance under demanding conditions. The C3 axial internal clearance ensures smooth operation, while the non-metallic cage reduces weight and enhances efficiency. Suitable for industrial machinery, pumps, gearboxes, and automation systems, this bearing is a reliable and cost-effective solution for high-load applications.

Specification:

• Bore Diameter: 55 mm

• Outer Diameter: 120 mm

• Width: 49.2 mm

• Contact Angle: 30°

• Load Ratings: 112 kN (dynamic), 81.5 kN (static)

• Speed Rating: 6,000 r/min (reference), 5,300 r/min (limiting)

• Number of Rows: 2

• Cage Type: Non-metallic

• Arrangement: Back-to-back (O)

• Axial Internal Clearance: C3

• Material: Bearing Steel

• Sealing: None (open bearing)

• Lubrication: None (requires external lubrication)

• Net Weight: 2.19 kg