71915 ACD/P4ADBC
71900 Series Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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Product Overview and Core Advantages
The 71915 ACD/P4ADBC is a precision angular contact ball bearing designed for demanding applications requiring exceptional rotational accuracy and rigidity. This duplex back-to-back (DB) arrangement bearing set is preloaded to Moderate / Class C specifications, delivering superior system stability and resistance to complex combined loads. Manufactured to P4A tolerance class, it ensures minimal runout and vibration, making it ideal for high-precision, high-reliability machinery. Its compact design and optimized internal geometry provide outstanding performance in a robust package.
71915 ACD/P4ADBC Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71915 | Basic bearing designation (75mm bore, 105mm OD, 32mm width) |
| AC | Angular Contact design with a 25° contact angle |
| D | Duplex Back-to-Back (DB) matched arrangement |
| P4A | High precision tolerance class (exceeds ABEC 7) |
| DBC | Specific preload and clearance designation for the DB set |
Structural Features and Performance Benefits
High Rigidity and Stability: The duplex back-to-back configuration creates a rigid bearing system that effectively resists moment loads and shaft deflection, ensuring precise shaft positioning under combined radial and axial loads.
Optimized Load Capacity: With a 25° contact angle and a dynamic load rating of 12,442 lbf, this bearing is engineered to handle significant thrust loads in both directions while maintaining high radial load capacity.
Precision Performance: The Phenolic cage provides excellent guidance at high speeds, contributing to smooth operation up to the limiting speed of 22,000 rpm. The P4A tolerance class guarantees minimal running inaccuracy.
Durable Construction: Manufactured from Chrome Steel for both rings and balls, this bearing offers high fatigue resistance and long service life in demanding operating conditions.
71915 ACD/P4ADBC Bearing Typical Application Areas
- Machine Tool Spindles: High-speed milling, grinding, and turning centers requiring extreme precision and rigidity
- Precision Gearboxes: Industrial transmissions where accurate shaft alignment and load capacity are critical
- High-Speed Motors: Spindle motors and high-frequency applications demanding stable rotation at elevated speeds
- Robotic Systems: Precision joints and rotary axes in industrial robots and automation equipment
- Aerospace Components: Auxiliary systems and instrumentation requiring reliable performance under complex loading conditions
