S71907 CB/P4A
Sealed Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
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S71907 CB/P4A Bearing Product Overview & Core Advantages
The S71907 CB/P4A is a high-precision angular contact ball bearing engineered for applications demanding exceptional accuracy and rigidity. Designed as a single-row bearing with a 15° contact angle, it excels at supporting combined loads—simultaneously handling substantial radial forces and axial loads in one direction. Manufactured to the stringent P4 (ABEC-7) tolerance class, it guarantees minimal runout and superior rotational accuracy. Its compact design, featuring a 35 mm bore and 10 mm width, makes it an ideal solution for high-speed spindles and precision machinery where space constraints and high rigidity are critical.
Model Code Breakdown
| Suffix Code | Technical Meaning | Benefit |
|---|---|---|
| S | Super-precision bearing | Indicates ultra-high precision and performance. |
| CB | Specific internal clearance and preload | Provides optimized preload for enhanced stiffness and precise shaft positioning. |
| P4A | P4 tolerance class (ABEC-7), with dimensional and running accuracy tolerances | Ensures exceptional running accuracy and low vibration for high-speed applications. |
S71907 CB/P4A Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The 15° contact angle and optimized preload (CB) work in tandem to deliver superior stiffness, enabling the bearing to effectively support combined radial and axial loads. This makes it exceptionally stable under complex loading conditions.
- High-Speed Performance: The lightweight and robust phenolic resin cage minimizes centrifugal forces and ensures stable operation at the high limiting speed of 34,000 rpm. The precision-ground chrome steel rings and balls reduce friction and heat generation.
- Sealed & Lubricated for Life: As a sealed bearing that comes pre-lubricated, it is protected from contamination and is designed for long-term, maintenance-free operation within its specified temperature range (-30°C to 110°C).
- Precision Engineering: Adherence to the P4 tolerance class guarantees tight dimensional control (e.g., bore diameter tolerance of -0.006mm to 0), resulting in smooth, quiet, and vibration-free performance.
S71907 CB/P4A Bearing Typical Application Areas
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Instrumentation: Measuring devices, optical scanners, and coordinate measuring machines (CMM).
- High-Frequency Motors and Spindles: Where minimal runout and high rotational accuracy are paramount.
- Medical Equipment: High-speed dental handpieces and laboratory automation systems.
