3306 A
Double Row Angular Contact Ball Bearings
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3306 A Bearing Product Overview & Core Advantages
The 3306 A is a precision double row angular contact ball bearing engineered for applications demanding high rigidity and accurate rotational performance. This metric system bearing is designed to simultaneously accommodate significant combined loads, including radial loads and axial loads in both directions. Its compact design, featuring a 30 mm bore and 72 mm outside diameter, makes it an ideal solution for space-constrained, high-reliability machinery. Manufactured to a P6 (ABEC-3) tolerance class, it ensures exceptional running accuracy and is pre-lubricated for immediate use, offering a robust and reliable component for demanding industrial environments.
3306 A Bearing Model Code Explained, Specifications & Naming Convention
| Suffix | Technical Meaning |
|---|---|
| A | Indicates a 30° contact angle, optimized for carrying high axial loads. |
| Open (Seal Type) | The bearing is supplied without seals or shields, allowing for higher limiting speeds and facilitating custom re-lubrication schemes if required by the application. |
3306 A Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The double row design provides superior rigidity and stability, enabling the bearing to support substantial combined radial and axial loads from both directions. The optimized load point distance of 42 mm contributes to a larger moment capacity.
- High-Speed Capability: The use of a lightweight, durable stainless steel cage minimizes centrifugal forces, allowing for a high limiting speed of 9,000 rpm. The open design further enhances heat dissipation and speed potential.
- Precision & Longevity: Manufactured from chrome steel for both rings and balls, and built to P6 precision class, this bearing ensures low noise, smooth operation, and extended service life. The pre-applied lubrication is effective within a temperature range of -30°C to 110°C.
