S71909 CB/HCP4A
Hybrid Ceramic Super Precision Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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S71909 CB/HCP4A Bearing Product Overview & Core Advantages
The S71909 CB/HCP4A is a high-precision angular contact ball bearing engineered for demanding applications requiring exceptional rotational accuracy and high-speed capability. As a single-row bearing, it is designed to accommodate combined loads, primarily handling substantial axial loads in one direction alongside radial loads. Its core advantages stem from a P4 (ABEC-7) tolerance class, a ceramic ball construction, and a phenolic cage, which collectively deliver superior high-speed performance, reduced weight, and excellent dimensional stability. This bearing is preloaded and comes pre-lubricated for immediate use, making it an ideal solution for high-reliability, high-rigidity spindles and precision machinery.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| S | Stainless Steel Bearing Ring (Note: Specification indicates Chrome Steel, "S" may denote a specific series or stainless variant; confirm with manufacturer data sheet). |
| 71909 | Bearing series and size designation (45mm bore, 68mm OD, 12mm width). |
| C | 15° Contact Angle. |
| B | 40° Contact Angle (Note: Specification indicates 15°. "B" may refer to a specific internal design or preload; confirm with manufacturer data sheet). |
| HC | Hybrid Ceramic (Ceramic balls with steel rings). |
| P4 | High Precision Tolerance Class (ABEC-7). |
| A | Specific internal clearance or preload grade. |
S71909 CB/HCP4A Bearing Structural Features & Performance Benefits
- Hybrid Ceramic Construction: The use of ceramic balls significantly reduces weight and centrifugal forces, enabling higher limiting speeds (32,000 rpm). Ceramic's inherent properties also provide superior resistance to wear and thermal deformation.
- Phenolic Resin Cage: This lightweight, high-strength cage material offers excellent dimensional stability and low friction, contributing to smooth operation at high speeds and reduced vibration.
- High Precision & Rigidity: Manufactured to a P4 tolerance class and supplied with preload, this bearing delivers exceptional running accuracy and system rigidity, minimizing deflection under load.
- Optimized Load Capacity: The 15° contact angle is optimized to handle significant one-direction axial loads in combination with radial loads, as reflected in its dynamic (1667 lbf) and static (1316 lbf) load ratings.
- Sealed & Lubricated for Long Life: As a sealed bearing that is pre-lubricated, it is protected from contamination and is ready for installation, offering a long, maintenance-free service life within its specified temperature range (-30° to 110 °C).
S71909 CB/HCP4A Bearing Typical Application Areas
- High-Speed Machine Tool Spindles
- Precision Grinding Spindles
- High-Frequency Electric Spindles
- Medical & Dental Drill Handpieces
- Aerospace Gyroscopes and Instrumentation
- High-Performance Robotics and Automation
