71915 ACE/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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71915 ACE/HCP4A Bearing Product Overview & Core Advantages
The 71915 ACE/HCP4A is a single row angular contact ball bearing engineered for applications demanding high precision and high-speed performance. Its defining characteristic is the 25° contact angle, which is optimized to support significant combined loads—handling both radial and axial forces simultaneously. Manufactured to the exacting P4 (ABEC-7) tolerance class, this bearing ensures exceptional running accuracy and rotational stability. The combination of a ceramic ball material and a phenolic cage contributes to lower friction, reduced weight, and superior performance at high rotational speeds, making it an ideal choice for high-rigidity and high-reliability spindle arrangements.
71915 ACE/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71915 | Standard bearing series and size designation. |
| ACE | Indicates a 25° contact angle and enhanced internal design for optimized performance. |
| HC | Signifies the use of Hybrid Ceramic balls (ceramic balls with steel rings). |
| P4A | Denotes the P4 (ABEC-7) tolerance class and specific accuracy requirements. |
71915 ACE/HCP4A Bearing Structural Features & Performance Benefits
Optimized Internal Geometry & High Rigidity: The 25° contact angle and precision-ground raceways are designed to provide high axial rigidity and stable support under combined loads.
Superior High-Speed Capability: The phenolic resin cage offers excellent strength-to-weight ratio and low friction, which is critical for achieving the high limiting speed of 29,000 rpm. The use of ceramic (silicon nitride) balls further reduces centrifugal forces, lowers operating temperature, and extends service life at high speeds.
High Precision & Load Capacity: Manufactured to P4 tolerance, this bearing ensures minimal runout and vibration. It offers a substantial dynamic load rating of 4770 lbf and a static load rating of 3600 lbf, providing reliable performance in demanding conditions.
Pre-Lubricated & Ready-to-Use: The bearing is pre-lubricated with a high-performance grease suitable for its specified temperature range of -30°C to 110°C, ensuring immediate operation and initial protection.
71915 ACE/HCP4A Bearing Typical Application Areas
The 71915 ACE/HCP4A is ideally suited for high-performance machinery where precision, speed, and reliability are paramount. Key applications include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Instrumentation: High-speed measuring and testing equipment.
- High-Frequency Motors & Spindles: Applications requiring minimal vibration and high rotational accuracy.
- Aerospace & Defense Systems: Gyroscopes, navigation systems, and other critical rotating assemblies.
