71956 CDGA/P4A
71900 Series Super Precision Angular Contact Ball Bearings
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Main Dimensions
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71956 CDGA/P4A Bearing Product Overview & Core Advantages
The 71956 CDGA/P4A is a super-precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. Manufactured to P4A tolerance class, this bearing delivers superior running accuracy for high-performance machinery. Its 15° contact angle and extra light preload (Class A) are optimized for high-speed operation while providing excellent resistance to combined loads. The universal matching (SU) designation allows for flexible mounting arrangements in sets, making it an ideal choice for high-precision, high-rigidity spindles.
71956 CDGA/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71956 | Basic bearing designation indicating metric dimensions (280mm bore, 380mm OD) |
| CD | Contact angle of 15° |
| G | Universal matching bearing for flexible mounting arrangements |
| A | Extra light preload (Class A) |
| /P4A | Super precision tolerance class with enhanced running accuracy |
71956 CDGA/P4A Bearing Structural Features & Performance Benefits
High Precision Construction: Manufactured to P4A tolerance standards with exceptionally tight dimensional tolerances (bore/OD tolerance: -0.004mm to 0), ensuring minimal runout and vibration for superior machining quality.
Optimized Load Capacity: The 15° contact angle configuration provides excellent performance under combined radial and axial loads, with a dynamic load rating of 65,475 lbf and static load rating of 102,375 lbf.
High-Speed Capability: The phenolic resin cage and optimized internal geometry enable a limiting speed of 7,500 rpm, making it suitable for high-speed spindle applications.
Thermal Stability: The phenolic cage material offers excellent dimensional stability across the operating temperature range of -30°C to 110°C, maintaining precision under thermal variations.
Precision Ball Complement: Features 31 high-precision chrome steel balls with 30.162 mm diameter, ensuring smooth operation and load distribution.
71956 CDGA/P4A Bearing Typical Application Areas
The 71956 CDGA/P4A is specifically engineered for high-precision applications including:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers
- Precision Gearboxes: Industrial transmission systems requiring minimal backlash
- Aerospace Components: Helicopter transmissions and aircraft auxiliary systems
- High-Speed Motors: Precision electric motors and generator systems
- Medical Equipment: CT scanner gantries and high-precision medical devices
- Robotics: Precision robot joints and automation equipment
