71912 ACD/P4ADBC
71900 Series Super Precision Angular Contact Ball Bearings
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71912 ACD/P4ADBC Bearing Product Overview & Core Advantages
The 71912 ACD/P4ADBC is a precision angular contact ball bearing designed for demanding applications requiring exceptional rotational accuracy and rigidity. This duplex back-to-back (DB) arrangement provides superior stiffness and moment load capacity, making it ideal for high-precision spindles and machinery. The bearing is pre-lubricated and features a P4A tolerance class for exceptional running accuracy, ensuring reliable performance in high-speed and high-rigidity applications.
71912 ACD/P4ADBC Bearing Model Code Explained, Specifications & Naming Convention
- 71912: Basic bearing series and size designation (60mm bore, 85mm OD, 26mm width).
- AC: Angular Contact design with a 25° contact angle.
- D: Indicates a duplex (two bearings as a set) configuration.
- P4A: High-Precision Tolerance Class, specifying extremely tight dimensional and running accuracy.
- DB: Back-to-Back mounting arrangement, providing high rigidity against moment loads.
- C: Specifies a Moderate Preload (Class C) for optimal stiffness and minimal deflection.
71912 ACD/P4ADBC Bearing Structural Features & Performance Benefits
High Rigidity & Moment Load Capacity: The duplex back-to-back (DB) arrangement creates a wide effective spread, significantly increasing the bearing's resistance to moment loads and providing exceptional system stiffness.
Precision Performance: Manufactured to P4A tolerance class, this bearing ensures minimal runout and vibration, which is critical for maintaining precision in high-speed machining and instrumentation.
Optimized for Combined Loads: The 25° contact angle is engineered to efficiently support substantial combined radial and axial loads simultaneously.
High-Speed Capability: The lightweight phenolic cage minimizes centrifugal forces, contributing to a high limiting speed of 33,000 rpm, while the pre-lubrication ensures consistent performance.
71912 ACD/P4ADBC Bearing Typical Application Areas
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Industrial Pumps & Compressors
- High-Frequency Machining Centers
- Robotic Arm Precision Joints
- Advanced Medical and Laboratory Equipment
