S71907 CB/HCP4A
Hybrid Ceramic Super Precision Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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S71907 CB/HCP4A Bearing Product Overview & Core Advantages
The S71907 CB/HCP4A is a high-precision, single-row angular contact ball bearing engineered for demanding applications requiring exceptional accuracy and performance. Its defining characteristic is the 15° contact angle, optimized to support combined loads—significant radial loads alongside substantial axial loads in one direction. Manufactured to the stringent P4 (ABEC-7) tolerance class, it guarantees minimal rotational runout and smooth operation. The bearing is preloaded and comes pre-lubricated, ensuring immediate high rigidity and operational readiness, making it an ideal solution for high-speed spindles and precision machinery.
S71907 CB/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Benefit |
|---|---|---|
| S7 | Series designation for high-precision angular contact bearings. | Indicates a design optimized for precision and high-speed operation. |
| 1907 | Standard size designation (35mm bore, 55mm OD, 10mm width). | Defines the bearing dimensions for interchangeability. |
| CB | Specific internal clearance and preload designation. | Ensures optimal internal fit for enhanced rigidity and system stability. |
| HC | Hybrid Ceramic: Signifies ceramic balls and steel rings. | Reduces weight and friction, increases limiting speed, and provides superior electrical insulation. |
| P4 | Tolerance class equivalent to ABEC-7. | Guarantees ultra-precision with tight dimensional and running accuracy tolerances. |
| A | 30° contact angle (Note: This is a common designation, but the provided spec states 15°. The 'A' suffix typically indicates a standard contact angle, which in this specific bearing is 15°). | Optimized for specific axial load capacity and stiffness requirements. |
S71907 CB/HCP4A Bearing Structural Features & Performance Benefits
Hybrid Ceramic Construction: The combination of chrome steel rings and silicon nitride (Si3N4) ceramic balls is a cornerstone of this bearing's performance. This hybrid design significantly reduces centrifugal forces, lowers operating temperature, and allows for a higher limiting speed (40,000 rpm) compared to all-steel equivalents. It also provides inherent electrical insulation, mitigating damage from electrical arcing.
High Rigidity and Preload: The bearing is supplied with a specified preload (CB designation), which eliminates internal clearance. This results in exceptionally high rigidity, critical for applications requiring precise shaft positioning and minimal deflection under load.
Phenolic Resin Cage: The lightweight and robust phenolic cage offers excellent dimensional stability and low friction at high speeds. Its self-lubricating properties contribute to smooth operation and are well-suited for the high temperature range (-30°C to 110°C).
Superior Load Capacity: With a dynamic load rating of 1141 lbf and a static load rating of 821 lbf, this angular contact ball bearing is designed to handle demanding combined loads effectively.
S71907 CB/HCP4A Bearing Typical Application Areas
- High-Frequency CNC Spindles for milling, grinding, and routing
- Precision Machine Tool main shafts and ball screws
- High-speed Robotic Arm joints and actuators
- Aerospace instrumentation and auxiliary systems
- High-performance Electric Motors and generators
