S71915 CD/HCP4A
Hybrid Ceramic Super Precision Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
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Materials
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S71915 CD/HCP4A Bearing Product Overview & Core Advantages
The S71915 CD/HCP4A is a high-precision angular contact ball bearing engineered for applications demanding exceptional accuracy and performance. As a single-row bearing, it is designed to accommodate high combined loads, primarily thrust loads in one direction, and is supplied with a specified preload for enhanced system rigidity and rotational accuracy. Its compact design, featuring a ceramic ball and phenolic cage, makes it an ideal solution for high-speed spindles, precision instruments, and other machinery where high rigidity and low rotational friction are critical.
S71915 CD/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Model Segment | Technical Meaning |
|---|---|
| S71915 | Denotes the bearing series and size. 'S' typically indicates a super-precision bearing. |
| CD | Specifies a preload class. This controlled internal clearance ensures high system stiffness and precise shaft positioning. |
| HC | Indicates the use of Hybrid Ceramic components, specifically ceramic balls, which reduce friction, heat generation, and allow for higher speeds. |
| P4 | Defines the tolerance class (equivalent to ABEC-7), signifying extremely tight dimensional and running accuracy for superior performance. |
| A | Specifies a 30° contact angle (Note: provided spec is 15°, this may be a series designation; the 15° angle is the functional specification). |
S71915 CD/HCP4A Bearing Structural Features & Performance Benefits
High-Speed & Low Friction Performance: The combination of ceramic balls and a lightweight phenolic resin cage significantly reduces centrifugal forces and friction, enabling a high limiting speed of 15,000 rpm. This hybrid construction also provides superior resistance to thermal expansion.
High Rigidity & Accuracy: The bearing is supplied with a preload, which eliminates internal clearance. This results in greatly increased system rigidity, improved guidance accuracy, and reduced vibration and noise levels. The P4 (ABEC-7) tolerance class ensures precise dimensional control.
High Load Capacity: The 15° contact angle is optimized to handle significant combined loads, offering a robust solution for applications with simultaneous radial and axial forces. The high-grade chrome steel rings provide excellent durability under these loads.
Sealed & Lubricated for Long Life: As a sealed and pre-lubricated unit, the bearing is protected from contamination and is ready for immediate installation, offering long-term, maintenance-free operation within its specified temperature range.
S71915 CD/HCP4A Bearing Typical Application Areas
The S71915 CD/HCP4A is ideally suited for high-performance applications across various industries, including:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Robotics: High-accuracy joints and arm assemblies.
- Medical Equipment: Dental handpieces, high-speed centrifuges.
- Aerospace & Defense: Gyroscopes, radar systems, and navigation instruments.
- High-Frequency Motors & Spindles: Where minimal runout and high rotational accuracy are paramount.
