71912 ACD/P4ADGB
71900 Series Super Precision Angular Contact Ball Bearings
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71912 ACD/P4ADGB Bearing Product Overview & Core Advantages
The 71912 ACD/P4ADGB is a precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and high-speed performance. As a universal matchable (SU) bearing, it can be paired with another identical bearing in various configurations to optimize preload and rigidity. Its P4A tolerance class ensures superior dimensional and running accuracy, making it ideal for high-precision spindles and other critical machinery. The bearing is pre-lubricated and features a phenolic cage, contributing to its high limiting speed of 33,000 rpm.
71912 ACD/P4ADGB Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| ACD | Contact Angle of 25°. Optimized for combined radial and axial loads. |
| P4A | High precision tolerance class exceeding ABEC 7 (P4), with additional running accuracy requirements. |
| DGB | Universal Matchable (SU) bearing. Two bearings can be paired in a back-to-back (DB), face-to-face (DF), or tandem (DT) arrangement. |
71912 ACD/P4ADGB Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The 25° contact angle and universal matchable design allow for the creation of stiff bearing pairs that effectively handle combined loads (radial and axial) from both directions. The light preload (Class B) minimizes deflection under operational stresses.
High-Speed Performance: The lightweight phenolic resin cage reduces centrifugal forces, while the optimized internal geometry and pre-lubrication work in concert to achieve an exceptional limiting speed for demanding applications.
Precision & Reliability: Manufactured to P4A tolerance class from high-grade chrome steel, this bearing guarantees consistent, low-vibration operation and long service life in precision machinery.
71912 ACD/P4ADGB Bearing Typical Application Areas
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Drives: Servo motors, high-frequency spindles.
- Aerospace & Defense Systems: Gyroscopes, radar equipment.
- Medical Equipment: Dental handpieces, high-speed centrifuges.
