71940 CDGA/P4A
71900 Series Super Precision Angular Contact Ball Bearings
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71940 CDGA/P4A Bearing Product Overview & Core Advantages
The 71940 CDGA/P4A is a single-row angular contact ball bearing designed for high-precision applications requiring exceptional rotational accuracy and rigidity. Manufactured to P4A tolerance class with an extra light preload (Class A), this bearing delivers superior running precision and minimal vibration. Its 15° contact angle is optimized to handle combined radial and axial loads simultaneously, making it ideal for machine tool spindles and other high-speed, high-rigidity systems. The universal matching (SU) design allows for flexible mounting arrangements in multi-bearing setups.
71940 CDGA/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71940 | Basic bearing designation (200mm bore, 280mm OD, 38mm width) |
| C | 15° contact angle design |
| DG | Universal matching bearing (can be paired in any combination) |
| A | Extra light preload (Class A) |
| /P4A | High precision tolerance class (superior to ABEC 7) |
71940 CDGA/P4A Bearing Structural Features & Performance Benefits
High Precision & Rigidity: The P4A tolerance class ensures minimal runout and vibration, while the extra light preload eliminates internal clearance for superior stiffness and positioning accuracy. The phenolic cage provides excellent dimensional stability at high speeds.
Optimized Load Capacity: With a 15° contact angle, this bearing efficiently handles combined radial and axial loads. The radial dynamic load rating of 46,800 lbf and static load rating of 59,625 lbf ensure reliable performance under demanding conditions.
High-Speed Capability: The lightweight phenolic cage and optimized internal geometry enable a limiting speed of 6,300 rpm, making it suitable for high-speed spindle applications.
Universal Matching Design: As a universal matchable (SU) bearing, it can be flexibly arranged in sets of three or more to create preloaded bearing systems with optimized stiffness and load distribution.
71940 CDGA/P4A Bearing Typical Application Areas
- Machine Tool Spindles - High-precision machining centers and grinding machines
- Precision Gearboxes - Industrial transmission systems requiring high rigidity
- High-Speed Motors - Electric motors and generators operating at elevated speeds
- Aerospace Components - Aircraft auxiliary systems and precision mechanisms
- Medical Equipment - CT scanners and other high-precision medical devices
