71915 CE/P4ADFA
71900 Series Super Precision Angular Contact Ball Bearings
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71915 CE/P4ADFA Bearing Product Overview & Core Advantages
The 71915 CE/P4ADFA is a precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. As a duplex face-to-face (DF) matched set, it offers superior performance in handling combined loads, including significant radial and bidirectional axial forces. Manufactured to the stringent P4A tolerance class, this bearing ensures minimal runout and high operational consistency. Its extra light preload (Class A) minimizes friction and heat generation, making it an ideal choice for high-speed applications up to 36,000 rpm. The use of a phenolic cage contributes to reduced weight and smooth operation at high velocities.
71915 CE/P4ADFA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71915 | Basic bearing designation (75mm bore, 105mm OD, 32mm width) |
| CE | Contact angle of 15°, optimized for high axial load capacity |
| P4A | High precision tolerance class for superior running accuracy |
| DF | Duplex Face-to-Face arrangement for bidirectional axial rigidity |
| A | Extra light preload for minimal friction and optimal high-speed performance |
71915 CE/P4ADFA Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The duplex face-to-face (DF) configuration creates a highly rigid bearing system capable of withstanding combined radial and axial loads from both directions. This design provides excellent stability under complex loading conditions.
Precision Engineering: Manufactured to P4A tolerance standards with tight dimensional controls (bore and OD tolerance: -0.004mm to 0), this bearing delivers exceptional running accuracy and minimal vibration.
High-Speed Capability: The phenolic resin cage offers excellent strength-to-weight ratio, reducing centrifugal forces and enabling stable operation at the limiting speed of 36,000 rpm. The 15° contact angle balances speed and load capacity.
Optimized Internal Geometry: With 23 precision balls of 9.525mm diameter, the bearing provides smooth motion transmission and even load distribution, contributing to extended service life.
71915 CE/P4ADFA Bearing Typical Application Areas
The 71915 CE/P4ADFA is specifically engineered for demanding precision applications including:
- Machine Tool Spindles - High-speed milling and grinding spindles requiring extreme accuracy
- Precision Gearboxes - Industrial transmission systems demanding high rigidity
- High-Speed Motors - Electric motors and generators operating at elevated speeds
- Medical Equipment - CT scanners and dental handpieces requiring smooth, precise rotation
- Aerospace Systems - Guidance systems and auxiliary power units where reliability is critical
