3207 Angular Contact Ball Bearings

3207 Angular Contact Ball Bearing | 3207C / 3207AC / 3207B

The 3207 angular contact ball bearing is a double-row high-rigidity precision bearing built for combined radial and axial loads. Featuring compact size, high load capacity and low-friction quiet operation, it outperforms single-row bearings in rigidity and stability, suited for space-constrained medium and heavy-duty precision transmission. Available in 3207C, 3207AC and 3207B contact angle types, as well as bearing steel and stainless steel materials, it delivers consistent performance in standard, humid and mildly corrosive industrial environments.

Difference Between 3207C, 3207AC and 3207B

3207C (15° Contact Angle): Adopts a 15° contact angle with ultra-low friction and excellent high-speed performance. It maintains precise rotation with moderate axial load capacity, ideal for compact high-speed spindles and high-precision automation equipment.

3207AC (25° Contact Angle): Equipped with a 25° contact angle for balanced radial and axial load resistance. With stable composite load performance and strong versatility, it serves as the universal cost-effective choice for most precision machinery applications.

3207B (40° Contact Angle): Features a 40° large contact angle for enhanced axial load capacity. It reliably withstands heavy axial thrust at low to medium speeds, perfect for compact equipment with offset loads and heavy axial force.

Material Differences: Bearing Steel vs Stainless Steel

Bearing Steel (GCr15): GCr15 bearing steel is the standard material for 3207 series bearings. Professional heat treatment offers high hardness, outstanding wear resistance and strong fatigue resistance, ensuring stable precision and long service life in conventional dry industrial conditions.

Stainless Steel: Stainless steel 3207 bearings provide excellent rust-proof, anti-oxidation and weak corrosion resistance. They resist moisture and minor contamination to avoid precision loss and corrosion failure, suitable for food machinery, medical equipment and high-humidity sanitary scenarios.

Product Features

Double-row structure improves structural rigidity and load capacity compared with single-row bearings. Supports multi-directional combined radial and axial loads. Three contact angle options adapt to high-speed, universal and heavy axial load working conditions. Delivers high-precision, smooth and low-noise operation. Dual material grades balance cost performance and anti-corrosion capability for diverse industrial scenarios.

Application Scenarios

3207 series double-row angular contact ball bearings are widely used in compact precision motors, machine tool spindles, industrial pumps, compressors and precision automation machinery. Bearing steel models fit conventional indoor industrial equipment; stainless steel versions adapt to damp, sanitary and lightly corrosive environments. 3207C for high-speed precision operation, 3207AC for general universal use, and 3207B for heavy axial load equipment.