7307 Angular Contact Ball Bearings

7307 Angular Contact Ball Bearing | 7307C / 7307AC / 7307B

The 7307 angular contact ball bearing is a single-row heavy-duty precision rolling bearing designed to support combined radial and axial loads. It features low friction, low noise and reliable high-speed stability, widely utilized in medium and heavy-duty industrial transmission and precision mechanical systems. Offered in 7307C, 7307AC and 7307B contact angle types, plus bearing steel and stainless steel material options, this bearing delivers consistent performance in standard, humid and mildly corrosive industrial environments.

Difference Between 7307C, 7307AC and 7307B

7307C (15° Contact Angle): Adopts a 15° contact angle with ultra-low friction and excellent high-speed performance. It maintains superior rotational precision with moderate axial load capacity, ideal for high-speed spindles and high-precision automation equipment.

7307AC (25° Contact Angle): Equipped with a 25° contact angle for balanced radial and axial load resistance. With stable composite load performance and great versatility, it acts as the universal cost-effective solution for most precision machinery applications.

7307B (40° Contact Angle): Features a 40° large contact angle to maximize axial load capacity. It steadily bears heavy axial thrust at low to medium speeds, perfectly suited for mechanical 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 7307 series bearings. Strict heat treatment provides high hardness, excellent wear resistance and strong anti-fatigue performance, ensuring long-term stable precision and extended service life in conventional dry industrial conditions.

Stainless Steel: Stainless steel 7307 bearings deliver excellent rust-proof, anti-oxidation and weak corrosion resistance. They effectively resist moisture and minor contamination to prevent precision loss and corrosion failure, suitable for food machinery, medical equipment and high-humidity sanitary working scenarios.

Product Features

Supports multi-directional combined radial and axial loads. Three contact angle specifications cover high-speed, universal and heavy axial load working scenarios. Ensures high precision, smooth rotation and low-noise operation. Dual material grades balance cost performance and anti-corrosion capability. Standard compact structure enables easy installation and replacement.

Application Scenarios

7307 series angular contact ball bearings are widely applied in precision motors, machine tool spindles, industrial pumps, compressors and heavy-duty automation machinery. Bearing steel models fit conventional indoor industrial equipment; stainless steel versions adapt to damp, sanitary and lightly corrosive environments. 7307C is optimized for high-speed precision operation, 7307AC for general universal use, and 7307B for heavy axial load mechanical equipment.