3306 Angular Contact Ball Bearings
| 3306 Angular Contact Ball Bearings | |||
|---|---|---|---|
| Part Number | 3306 | Weight(Kg) | 0.530 |
| d | 30 | Dynamic Load Co(N) | 36800 |
| D1 | 72 | Static Load Cor(N) | 23800 |
| B | 30.2 | Grease Speed | 7800 |
| R | 1.1 | Oil Speed | 10500 |
3306 Angular Contact Ball Bearing | 3306C / 3306AC / 3306B
The 3306 angular contact ball bearing is a widened double-row heavy-duty precision bearing designed for high combined radial and axial loads. Featuring high structural rigidity, ultra-large load capacity, low friction and quiet stable operation, it is widely adopted in medium and heavy-duty mechanical transmission systems. Available in 3306C, 3306AC and 3306B contact angle types, as well as bearing steel and stainless steel materials, this bearing delivers stable and reliable performance for standard, humid and mildly corrosive industrial working environments.
Difference Between 3306C, 3306AC and 3306B
3306C (15° Contact Angle): Built with a 15° contact angle with ultra-low friction and outstanding high-speed stability. It maintains high rotational precision with moderate axial load capacity, ideal for high-speed precision spindles and automated precision machinery.
3306AC (25° Contact Angle): Adopts a 25° contact angle with balanced radial and axial load resistance. It provides stable composite load performance and strong versatility, serving as the universal cost-effective option for most precision machinery applications.
3306B (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, perfectly suited 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 3306 series bearings. Professional heat treatment ensures high hardness, excellent wear resistance and strong fatigue resistance, maintaining stable operational precision and long service life in conventional dry industrial conditions.
Stainless Steel: Stainless steel 3306 bearings feature superior 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 greatly improves rigidity and load capacity compared with ordinary double-row bearings. Supports multi-directional combined radial and axial loads. Three contact angle specifications adapt to high-speed, universal and heavy axial load working demands. Ensures high-precision, smooth and low-noise operation. Dual material grades balance cost performance and anti-corrosion ability for diverse industrial applications.
Application Scenarios
3306 series double-row angular contact ball bearings are widely applied in heavy-duty precision motors, industrial compressors, hydraulic pumps, machine tool equipment and engineering machinery. Bearing steel models fit conventional industrial equipment; stainless steel versions adapt to damp, clean and lightly corrosive environments. 3306C for high-speed precision operation, 3306AC for general universal use, and 3306B for heavy axial load mechanical equipment.
