71912 CE/P4ADBA
71900 Series Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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71912 CE/P4ADBA Bearing Product Overview & Core Advantages
The 71912 CE/P4ADBA is a precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. This duplex back-to-back (DB) matched set delivers superior performance under combined loads, effectively managing both radial and axial forces. Manufactured to the stringent P4A tolerance class, it ensures minimal runout and vibration, making it ideal for high-speed, high-precision machinery. The extra light preload (Class A) minimizes friction and heat generation, contributing to enhanced operational efficiency and longevity.
71912 CE/P4ADBA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71912 | Bearing series and size designation (60mm bore, 85mm OD) |
| CE | Contact angle of 15° |
| P4A | High precision tolerance class (superior to ABEC 7) |
| DB | Duplex Back-to-Back arrangement |
| A | Extra light preload classification |
71912 CE/P4ADBA Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The duplex back-to-back configuration creates a rigid bearing system that can withstand significant moment loads and combined radial and axial loads. The 15° contact angle provides optimal load distribution.
High-Speed Performance: The phenolic resin cage offers excellent strength-to-weight ratio, reducing centrifugal forces and enabling stable operation at limiting speeds up to 31,000 rpm.
Precision Engineering: Manufactured to P4A tolerance class with tight dimensional control (bore/OD tolerance: -0.004mm to 0), ensuring minimal vibration and precise rotational accuracy.
Material Excellence: Constructed from chrome steel for both rings and balls, providing high hardness, wear resistance, and dimensional stability across the operating temperature range of -30°C to 110°C.
71912 CE/P4ADBA Bearing Typical Application Areas
The 71912 CE/P4ADBA is specifically engineered for demanding applications including:
- Machine Tool Spindles - High-precision machining centers and grinding machines
- High-Speed Machining Centers - Where rotational accuracy and rigidity are critical
- Precision Instrumentation - Measuring equipment and optical devices
- Robotic Systems - High-accuracy robotic arms and positioning systems
- Aerospace Components - Guidance systems and flight control mechanisms
