71912 CD/P4ADBG39
71900 Series Super Precision Angular Contact Ball Bearings
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71912 CD/P4ADBG39 Bearing Product Overview & Core Advantages
The 71912 CD/P4ADBG39 is a precision angular contact ball bearing designed for demanding applications requiring exceptional rotational accuracy and rigidity. This duplex back-to-back (DB) arrangement bearing set is preloaded, delivering superior high rigidity and stability under complex loading conditions. Manufactured to P4A tolerance class, it ensures minimal runout and is ideal for high-speed, high-precision machinery where uncompromising performance is critical.
71912 CD/P4ADBG39 Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71912 | Basic bearing designation (60mm bore, 85mm OD, 26mm width) |
| C | 15° contact angle design |
| D | Duplex bearing arrangement |
| P4A | High precision tolerance class (superior to ABEC 7) |
| DB | Back-to-back mounting configuration |
| G39 | Preload level specification |
71912 CD/P4ADBG39 Bearing Structural Features & Performance Benefits
Enhanced Rigidity: The duplex back-to-back arrangement with preload creates a rigid bearing system that effectively resists moment loads and shaft deflection, making it ideal for applications requiring high positional accuracy.
Superior Load Capacity: With a 15° contact angle and optimized internal geometry, this bearing efficiently handles combined radial and axial loads in both directions, providing reliable performance under complex loading conditions.
High-Speed Capability: The phenolic resin cage offers excellent strength-to-weight ratio and smooth operation at the limiting speed of 36,000 rpm, while the precision-ground chrome steel components minimize friction and heat generation.
Precision Performance: Manufactured to P4A tolerance class with tight dimensional controls (bore/OD tolerance: -0.004mm to 0), this bearing ensures minimal vibration and precise rotational characteristics for demanding applications.
71912 CD/P4ADBG39 Bearing Typical Application Areas
The 71912 CD/P4ADBG39 is specifically engineered for high-performance applications including:
- Machine Tool Spindles - High-speed milling and grinding spindles requiring precision and rigidity
- Precision Gearboxes - Industrial transmission systems demanding accurate shaft positioning
- High-Speed Motors - Electric motors and generators operating at elevated speeds
- Aerospace Components - Flight control systems and auxiliary power units
- Medical Equipment - High-speed dental handpieces and surgical tools
