71912 CD/P4ADBB
71900 Series Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
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Materials
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71912 CD/P4ADBB Bearing Product Overview & Core Advantages
The 71912 CD/P4ADBB is a precision duplex angular contact ball bearing designed for applications requiring exceptional rotational accuracy and rigidity. This matched back-to-back arrangement is preloaded to Light / Class B specifications, ensuring optimal performance under combined radial and axial loads. Manufactured to the stringent P4A tolerance class, it delivers superior running accuracy, making it ideal for high-speed, high-precision machinery where uncompromising reliability is critical.
71912 CD/P4ADBB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71912 | Basic bearing designation |
| C | 15° contact angle |
| D | Duplex bearing set |
| P4A | High precision tolerance class (exceeds ABEC 7) |
| DB | Back-to-Back mounting arrangement |
| B | Light preload |
71912 CD/P4ADBB Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The duplex back-to-back (DB) configuration creates a large effective spread between load centers, significantly increasing moment stiffness and enabling the bearing to handle substantial combined loads and overturning moments.
Precision Performance: Manufactured to P4A tolerance class with a 15° contact angle, this bearing ensures minimal runout and vibration, which is critical for maintaining positioning accuracy in precision equipment.
High-Speed Capability: The phenolic resin cage offers excellent strength-to-weight ratio and operates smoothly at the limiting speed of 36,000 rpm, making it suitable for demanding high-speed applications.
Premium Material Construction: Both rings and balls are manufactured from chrome steel, providing high hardness, wear resistance, and long service life under demanding operating conditions.
71912 CD/P4ADBB Bearing Typical Application Areas
- Machine Tool Spindles for milling, grinding, and turning centers
- High-Speed Machining Centers requiring extreme precision
- Precision Gearboxes and transmission systems
- Industrial Robotics and automation equipment
- Medical Equipment spindles and precision mechanisms
- Aerospace control systems and auxiliary drives
