7300 Angular Contact Ball Bearings

7300 Angular Contact Ball Bearing | 7300C / 7300AC / 7300B

The 7300 angular contact ball bearing is a high-load single-row precision bearing designed to support combined radial and axial loads. It delivers low noise, low friction and stable high-speed operation, ideal for medium and heavy-duty precision transmission systems. Available in 7300C, 7300AC and 7300B contact angle types with bearing steel and stainless steel options, this bearing works reliably in dry, humid and mildly corrosive industrial environments.

Difference Between 7300C, 7300AC and 7300B

7300C (15° Contact Angle): Features a 15° contact angle with minimal friction loss and excellent high-speed performance. It maintains superior rotational precision with moderate axial load capacity, best for high-speed spindles and precision automation equipment.

7300AC (25° Contact Angle): Adopts a 25° contact angle with balanced radial and axial load resistance. It offers stable composite load performance and great versatility, serving as the universal cost-effective model for most precision machinery applications.

7300B (40° Contact Angle): Equipped with a 40° large contact angle for maximum axial load capacity. It stably bears heavy axial thrust under low and medium speeds, perfect for machinery 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 7300 series bearings. Professional heat treatment provides high hardness, excellent wear resistance and strong fatigue resistance, ensuring long-term stable precision and service life in conventional dry industrial conditions.

Stainless Steel: Stainless steel 7300 bearings provide outstanding rust-proof, oxidation and weak corrosion resistance. They resist moisture, humid air and minor contamination to avoid precision loss and corrosion failure, suitable for food machinery, medical devices and high-humidity sanitary scenarios.

Product Features

Supports combined radial and axial multi-directional loads. Three contact angle specifications adapt to high-speed, universal and heavy axial load working conditions. High precision, smooth rotation and low-noise operation. Dual material options balance cost performance and anti-corrosion ability. Standard structure enables easy installation and replacement.

Application Scenarios

7300 series angular contact ball bearings are widely used in precision motors, machine tool spindles, industrial pumps, compressors and automation precision machinery. Bearing steel models suit conventional indoor industrial equipment; stainless steel versions adapt to damp, sanitary and light corrosive environments. 7300C for high-speed precision operation, 7300AC for general universal use, and 7300B for heavy axial load equipment.