71901 CEGB/P4A
71900 Series Super Precision Angular Contact Ball Bearings
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71901 CEGB/P4A Bearing Product Overview & Core Advantages
The 71901 CEGB/P4A is a super-precision angular contact ball bearing designed for applications demanding the highest levels of rotational accuracy and speed. As a single bearing with a 15° contact angle and Universal Matchable (SU) designation, it is engineered to be paired with an identical bearing to form a precisely preloaded duplex set. Its core advantages include exceptional running accuracy due to its P4A tolerance class, high-speed capability supported by a phenolic cage, and the ability to accommodate combined radial and axial loads efficiently.
71901 CEGB/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71901 | Basic bearing designation indicating a super-precision, single-row angular contact ball bearing with a 12mm bore. |
| C | Specifies a 15° contact angle, optimized for high-speed applications requiring high rigidity. |
| E | Indicates optimized internal geometry and surface finish for enhanced performance. |
| GB | Signifies a Light preload (Class B), providing consistent running accuracy and stiffness when mounted. |
| P4A | Denotes an ABEC 7 / ISO P4 tolerance class with enhanced width and radial runout tolerances for superior precision. |
71901 CEGB/P4A Bearing Structural Features & Performance Benefits
- High Precision & Rigidity: Manufactured to P4A tolerance class with extremely tight dimensional tolerances on bore, outside diameter, and width. The 15° contact angle and light preload (GB) provide excellent axial and radial stiffness, minimizing deflection under load.
- Superior High-Speed Performance: The lightweight phenolic resin cage ensures low friction and stable operation at the high limiting speed of 165,000 rpm. The open design facilitates efficient lubrication and heat dissipation.
- Optimized Load Capacity: The bearing's internal design, including 12 high-precision chrome steel balls, provides a dynamic load rating of 486 lbf, enabling reliable performance under combined loads.
- Universal Matching (SU): This feature allows two identical 71901 CEGB/P4A bearings to be universally matched in any arrangement (back-to-back, face-to-face, or tandem) to meet specific application requirements for preload and stiffness.
71901 CEGB/P4A Bearing Typical Application Areas
This precision angular contact ball bearing is ideally suited for high-performance applications where speed, accuracy, and rigidity are critical. Key industries and equipment include:
- High-Speed Machine Tool Spindles
- Precision Grinding Spindles
- High-Frequency Machining Centers
- Dental and Medical Handpiece Drives
- Robotic Arm Joints and Precision Gearboxes
