71940 CD/P4ADGA
71900 Series Super Precision Angular Contact Ball Bearings
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71940 CD/P4ADGA Bearing Product Overview & Core Advantages
The 71940 CD/P4ADGA is a precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. As a universal matchable (SU) bearing supplied in sets of two, it enables simplified installation and optimal preload configuration. Its P4A tolerance class ensures superior dimensional and running accuracy, making it ideal for high-speed spindles and precision machinery. The bearing is pre-lubricated and features a phenolic cage, contributing to its high-speed capability and stable performance under combined radial and axial loads.
71940 CD/P4ADGA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71940 | Basic bearing series and size designation |
| CD | Contact angle of 15° and specific internal design |
| P4A | High precision tolerance class (exceeding ABEC 7) |
| DGA | Universal matchable bearing set with extra light preload (Class A) |
71940 CD/P4ADGA Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The angular contact design with 15° contact angle provides excellent resistance to combined loads, handling both substantial radial forces and axial loads in one direction.
- Precision Performance: Manufactured to P4A tolerance class with tight dimensional controls (bore/OD tolerance: -0.004mm to 0), ensuring minimal runout and vibration for superior machining quality.
- High-Speed Capability: The phenolic cage offers low weight and excellent sliding properties, enabling limiting speeds up to 6,300 rpm. Pre-lubrication further supports smooth high-speed operation.
- Optimized Preload: As a universal matchable (SU) set with extra light preload (Class A), these bearings deliver precise axial clearance control without complex calculations, reducing installation time and ensuring consistent performance.
71940 CD/P4ADGA Bearing Typical Application Areas
The 71940 CD/P4ADGA is engineered for high-performance applications including:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers
- Precision Rotary Tables: Indexing and positioning systems
- High-Frequency Motors: Spindles for PCB drilling and precision machining
- Medical Equipment: CT scanners and dental machining units
- Aerospace Testing Equipment: Precision rotary actuators and simulators
