3300 Angular Contact Ball Bearings

3300 Angular Contact Ball Bearing | 3300C / 3300AC / 3300B

The 3300 angular contact ball bearing is a double-row heavy-duty precision bearing with widened structure, designed for high combined radial and axial loads. It features high rigidity, large load capacity, low friction and stable low-noise operation. Widely used for medium and heavy-duty mechanical transmission, this bearing is available in 3300C, 3300AC and 3300B contact angle types, as well as bearing steel and stainless steel materials to adapt to standard, humid and lightly corrosive working environments.

Difference Between 3300C, 3300AC and 3300B

3300C (15° Contact Angle): Built with a 15° contact angle, delivering ultra-low friction and outstanding high-speed stability. It maintains excellent rotational precision with moderate axial load capacity, ideal for high-speed precision spindles and automated machinery.

3300AC (25° Contact Angle): Adopts a 25° contact angle with balanced radial and axial load performance. It provides stable composite load resistance and strong versatility, serving as the universal cost-effective option for most precision machinery applications.

3300B (40° Contact Angle): Equipped with a 40° large contact angle for maximum axial load capacity. It steadily withstands heavy axial thrust at low to medium speeds, perfect for heavy-duty equipment with large axial force and offset loads.

Material Differences: Bearing Steel vs Stainless Steel

Bearing Steel (GCr15): GCr15 bearing steel is the standard material for 3300 series bearings. Strict heat treatment ensures high hardness, superior wear resistance and strong fatigue resistance, supporting long-term stable operation and consistent precision in conventional dry industrial conditions.

Stainless Steel: Stainless steel 3300 bearings feature excellent rust-proof, anti-oxidation and weak corrosion resistance. They effectively resist moisture, humidity and minor contamination, avoiding precision loss and corrosion damage, suitable for food processing, medical equipment and high-humidity sanitary scenarios.

Product Features

Widened double-row structure provides higher load capacity and rigidity than standard double-row bearings. Supports multi-directional combined radial and axial loads. Three contact angle options cover high-speed, general-purpose and heavy axial load working conditions. Ensures smooth, low-noise and high-precision operation. Dual material designs balance cost performance and corrosion resistance for diverse industrial applications.

Application Scenarios

3300 series double-row angular contact ball bearings are widely used in heavy-duty precision motors, industrial compressors, hydraulic pumps, machine tool equipment and engineering machinery. Bearing steel models apply to conventional industrial equipment; stainless steel versions fit damp, clean and lightly corrosive environments. 3300C suits high-speed precision operation, 3300AC for universal use, and 3300B for heavy axial load mechanical equipment.