71907 CE/P4A
71900 Series Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
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Materials
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71907 CE/P4A Bearing Product Overview & Core Advantages
The 71907 CE/P4A is a single-row angular contact ball bearing engineered for applications demanding high precision and superior performance. Its defining feature is the 15° contact angle, which enables it to support significant combined loads—handling both radial and axial forces simultaneously with high efficiency. Manufactured to the exacting P4 (ABEC-7) tolerance class, this bearing is characterized by its exceptional running accuracy, low noise, and low vibration levels. The combination of a phenolic resin cage, high-grade chrome steel components, and factory-applied lubrication makes it an ideal solution for high-speed spindles and other precision machinery where rigidity and reliability are paramount.
Model Code Breakdown
| Model Segment | Code | Technical Meaning |
|---|---|---|
| Basic Designation | 71907 | Denotes a high-precision, single-row angular contact ball bearing series with a 35 mm bore, 55 mm OD, and 10 mm width. |
| Internal Design | CE | Indicates a 15° contact angle and optimized internal geometry for high-speed operation and high rigidity. |
| Tolerance Class | P4A | Specifies a P4 (ABEC-7) precision grade with enhanced dimensional and running accuracy tolerances. |
71907 CE/P4A Bearing Structural Features & Performance Benefits
- High-Speed Capability: The lightweight and robust phenolic resin cage ensures excellent dimensional stability and low friction at high rotational speeds, contributing to a limiting speed of 54,000 rpm.
- Superior Rigidity and Load Capacity: The 15° contact angle and precision-ground raceways provide high axial and radial stiffness. With a dynamic load rating of 1755 lbf and a static load rating of 1046 lbf, it reliably handles demanding combined loads.
- Precision Engineering: Conforming to the P4 tolerance class, this bearing guarantees minimal runout and vibration, which is critical for the accuracy of high-precision spindles.
- Optimized for Performance: The open design allows for custom lubrication regimes, while the standard factory lubrication ensures immediate operational readiness. The use of high-quality chrome steel for rings and balls ensures long service life and consistent performance within a temperature range of -30°C to 110°C.
71907 CE/P4A Bearing Typical Application Areas
The 71907 CE/P4A is specifically designed for high-performance applications, including:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Robotics: Articulated arms and high-accuracy positioning systems.
- High-Frequency Motors and Spindles: Where minimal runout and high rotational accuracy are required.
- Medical and Dental Equipment: High-speed handpieces and diagnostic scanners.
- Aerospace Instrumentation: Gyroscopes and other precision navigation components.
