71902 ACD/HCP4A
Hybrid Ceramic Super Precision Bearings
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71902 ACD/HCP4A Bearing Product Overview & Core Advantages
The 71902 ACD/HCP4A is a single-row angular contact ball bearing designed for applications demanding exceptional precision and high-speed performance. Engineered to accommodate combined loads (radial and axial loads in one direction), this bearing features a 25° contact angle optimized for high axial load capacity. Its P4 (ABEC-7) tolerance class ensures ultra-precise rotational accuracy, while the ceramic ball construction significantly reduces centrifugal forces, enabling superior high-speed capabilities up to 95,000 rpm. This combination makes it ideal for high-rigidity, precision spindle applications.
71902 ACD/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71902 | Basic bearing series and size designation (15mm bore, 28mm OD) |
| AC | Angular Contact design with a 25° contact angle |
| D | High-Precision (Super Precision) designation |
| HC | Hybrid Ceramic construction (steel rings with ceramic balls) |
| P4 | P4 tolerance class (ABEC-7 equivalent), ensuring ultra-precise running accuracy |
| A | Preload level designation (Light preload for high-speed applications) |
71902 ACD/HCP4A Bearing Structural Features & Performance Benefits
Hybrid Ceramic Design: The use of silicon nitride ceramic balls provides significant advantages including reduced weight, lower friction, and superior performance at high speeds. Ceramic balls are electrically insulating and exhibit excellent resistance to thermal expansion.
High-Speed Capability: The combination of ceramic balls and a phenolic resin cage minimizes centrifugal forces and ensures stable operation at extreme rotational speeds up to 95,000 rpm.
Precision Engineering: Manufactured to P4 tolerance class with optimized raceway geometry and surface finish, this bearing delivers exceptional running accuracy and minimal vibration for precision applications.
Optimized Load Capacity: The 25° contact angle provides an excellent balance between radial and axial load carrying capacity, making it suitable for applications with significant thrust loads.
Preload Configuration: The bearing comes with light preload applied, which enhances rigidity and minimizes axial and radial play without compromising high-speed performance.
71902 ACD/HCP4A Bearing Typical Application Areas
- High-Speed Machine Tool Spindles: CNC machining centers, grinding spindles, and milling applications
- Precision Medical Equipment: Dental handpieces, surgical tools, and laboratory instrumentation
- Aerospace Components: Gyroscopes, navigation systems, and auxiliary power units
- Semiconductor Manufacturing: Wafer handling robots, precision positioning stages
- High-Frequency Motors: Spindle motors, high-RPM electric motors, and turbochargers
