3307 Angular Contact Ball Bearings
| 3307 Angular Contact Ball Bearings | |||
|---|---|---|---|
| Part Number | 3307 | Weight(Kg) | 0.710 |
| d | 35 | Dynamic Load Co(N) | 45200 |
| D1 | 80 | Static Load Cor(N) | 30200 |
| B | 34.9 | Grease Speed | 6800 |
| R | 1.1 | Oil Speed | 9200 |
3307 Angular Contact Ball Bearing | 3307C / 3307AC / 3307B
The 3307 angular contact ball bearing is a widened double-row heavy-duty precision bearing, specially designed to handle high combined radial and axial loads. It features high rigidity, large load capacity, low friction and low-noise stable operation, widely used in medium and heavy-duty mechanical transmission systems. Available in 3307C, 3307AC and 3307B contact angle types and dual material options, this bearing delivers consistent and reliable performance in standard, humid and mildly corrosive industrial environments.
Difference Between 3307C, 3307AC and 3307B
3307C (15° Contact Angle): Features a 15° contact angle with ultra-low friction and excellent high-speed stability. It maintains high rotational precision with moderate axial load capacity, suitable for high-speed precision spindles and automated precision machinery.
3307AC (25° Contact Angle): Adopts a 25° contact angle with balanced radial and axial load resistance. It offers stable composite load performance and strong versatility, serving as the universal cost-effective solution for most precision machinery applications.
3307B (40° Contact Angle): Equipped with a 40° large contact angle for maximum axial load capacity. It reliably withstands heavy axial thrust at low to medium speeds, ideal for heavy-duty equipment with offset loads and large axial force.
Material Differences: Bearing Steel vs Stainless Steel
Bearing Steel (GCr15): GCr15 bearing steel is the standard material for 3307 series bearings. Professional heat treatment provides high hardness, excellent wear resistance and strong fatigue resistance, ensuring stable precision and long service life in conventional dry industrial conditions.
Stainless Steel: Stainless steel 3307 bearings provide outstanding rust-proof, anti-oxidation and weak corrosion resistance. They effectively resist moisture and minor contamination to prevent precision loss and corrosion damage, perfect for food machinery, medical equipment and high-humidity sanitary scenarios.
Product Features
Widened double-row structure improves structural rigidity and load capacity compared with ordinary bearings. Supports multi-directional combined radial and axial loads. Three contact angle types cover high-speed, universal and heavy axial load working conditions. Ensures smooth, high-precision and quiet operation. Dual material grades balance cost performance and anti-corrosion ability for diverse industrial scenarios.
Application Scenarios
3307 series double-row angular contact ball bearings are widely used in heavy-duty precision motors, industrial compressors, hydraulic pumps, machine tools and engineering machinery. Bearing steel models adapt to conventional industrial equipment; stainless steel versions fit damp, clean and lightly corrosive environments. 3307C for high-speed precision operation, 3307AC for general universal use, and 3307B for heavy axial load mechanical equipment.
