71803 CD/P4
71800 Series Super Precision Angular Contact Ball Bearings
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Main Dimensions
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71803 CD/P4 Bearing Product Overview & Core Advantages
The 71803 CD/P4 is a high-precision angular contact ball bearing designed for applications demanding exceptional accuracy and rigidity. Engineered to a P4 (ABEC-7) tolerance class, this single bearing is preloaded and optimized to handle combined loads—significant radial loads alongside thrust loads in one direction. Its compact design, with a 5 mm width, makes it an ideal solution for high-speed spindles and other precision machinery where space is constrained and performance is critical.
Model Code Breakdown
- 71803: Basic model number denoting a metric, single-row angular contact ball bearing with a 17 mm bore.
- C: Indicates a 15° contact angle, optimized for high-speed operation.
- D: Signifies that the bearing is supplied with a specific preload for enhanced rigidity and rotational accuracy.
- P4: Denotes an ultra-precision tolerance class equivalent to ABEC-7, ensuring minimal runout and vibration.
71803 CD/P4 Bearing Structural Features & Performance Benefits
High Rigidity and Precision: The combination of a 15° contact angle and factory-applied preload ensures high system stiffness, minimizes axial and radial deflection, and provides precise rotational guidance, which is critical for machining accuracy.
Optimized for High-Speed Operation: The lightweight phenolic resin cage ensures stable operation and reduced centrifugal forces at the limiting speed of 85,000 rpm. The specified contact angle further contributes to lower heat generation at high rotational velocities.
Superior Load Capacity: Manufactured from chrome steel and featuring a generous complement of 18 balls, this bearing offers a dynamic load rating of 526 lbf and a static load rating of 360 lbf, providing reliable performance under demanding combined load conditions.
71803 CD/P4 Bearing Typical Application Areas
This high-precision angular contact bearing is ideally suited for applications requiring high speed, rigidity, and accuracy, including:
- High-Frequency Spindles for PCB drilling and precision machining
- Precision Grinding Spindles
- High-speed rotors in Medical and Dental Handpieces
- Axial compressors and other precision instruments
