3308 Angular Contact Ball Bearings
| 3308 Angular Contact Ball Bearings | |||
|---|---|---|---|
| Part Number | 3308 | Weight(Kg) | 0.930 |
| d | 40 | Dynamic Load Co(N) | 54800 |
| D1 | 90 | Static Load Cor(N) | 37800 |
| B | 36.5 | Grease Speed | 6000 |
| R | 1.5 | Oil Speed | 8000 |
3308 Angular Contact Ball Bearing | 3308C / 3308AC / 3308B
The 3308 angular contact ball bearing is a widened double-row heavy-duty precision bearing optimized for high combined radial and axial loads. It delivers high rigidity, superior load capacity, low friction and quiet stable operation, fitting a wide range of medium and heavy-duty transmission machinery. Available in 3308C, 3308AC and 3308B contact angle types with bearing steel and stainless steel options, it ensures stable operation in standard, humid and mildly corrosive industrial environments.
Difference Between 3308C, 3308AC and 3308B
3308C (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, ideal for high-speed precision spindles and automated precision machinery.
3308AC (25° Contact Angle): Adopts a 25° contact angle with balanced radial and axial load resistance. It provides reliable composite load performance and strong versatility, acting as the universal cost-effective choice for most precision machinery applications.
3308B (40° Contact Angle): Equipped with a 40° large contact angle for enhanced axial load capacity. It steadily withstands heavy axial thrust at low to medium speeds, perfect 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 3308 series bearings. Professional heat treatment offers high hardness, outstanding wear resistance and strong fatigue resistance, ensuring long-term stable precision and service life in conventional dry industrial conditions.
Stainless Steel: Stainless steel 3308 bearings feature excellent rust-proof, anti-oxidation and weak corrosion resistance. They effectively 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
Widened double-row structure boosts structural rigidity and load capacity compared with ordinary double-row bearings. Supports multi-directional combined radial and axial loads. Three contact angle specifications cover high-speed, universal and heavy axial load working conditions. Ensures high-precision, smooth and low-noise operation. Dual material grades balance cost performance and anti-corrosion ability for diverse industrial applications.
Application Scenarios
3308 series double-row angular contact ball bearings are widely applied in heavy-duty precision motors, industrial compressors, hydraulic pumps, machine tools and engineering machinery. Bearing steel models suit conventional industrial equipment; stainless steel versions adapt to damp, clean and lightly corrosive environments. 3308C for high-speed precision operation, 3308AC for general universal use, and 3308B for heavy axial load mechanical equipment.
