71915 ACD/P4ATBTA
71900 Series Super Precision Angular Contact Ball Bearings
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Main Dimensions
Ball & Washer Dimensions
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71915 ACD/P4ATBTA Bearing Product Overview & Core Advantages
The 71915 ACD/P4ATBTA is a precision angular contact ball bearing designed for demanding applications requiring exceptional rigidity and accuracy. As part of a triplex back-to-back (TBT) matched set, this bearing is engineered to handle combined loads with high stability. Its P4A tolerance class ensures superior running accuracy, making it ideal for high-speed spindles and other precision machinery where high rigidity and minimal runout are critical.
71915 ACD/P4ATBTA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71915 | Basic bearing series and size designation (75mm bore, 105mm OD) |
| ACD | Angular Contact Design with a 25° contact angle |
| P4A | High precision tolerance class (exceeds ABEC 7/ISO P4) |
| TBT | Triplex Back-to-Back arrangement in a matched set of 3 bearings |
| A | Extra light preload for minimal friction and optimal high-speed performance |
71915 ACD/P4ATBTA Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The triplex back-to-back configuration creates an exceptionally rigid bearing system capable of withstanding heavy combined radial and axial loads from both directions. This arrangement provides superior moment stiffness compared to single bearings.
Precision Performance: Manufactured to P4A tolerance class with tight dimensional control (bore/OD tolerance: -0.004mm to 0), this bearing ensures minimal vibration and precise rotational accuracy for demanding applications.
High-Speed Capability: The phenolic cage material and optimized internal geometry contribute to stable operation at limiting speeds up to 22,000 rpm, while the 25° contact angle provides balanced load capacity for both radial and axial forces.
Premium Material Construction: Made from chrome steel for both rings and balls, this bearing offers excellent durability and fatigue resistance under demanding operating conditions.
71915 ACD/P4ATBTA Bearing Typical Application Areas
- Machine Tool Spindles - High-precision milling, grinding, and turning centers
- High-Speed Machining Centers - Where rigidity and accuracy are paramount
- Precision Gearboxes - Industrial transmission systems requiring minimal deflection
- Robotic Arm Joints - Applications demanding high moment stiffness
- Aerospace Positioning Systems - Critical motion control applications
- Medical Equipment Spindles - High-speed dental and surgical tools
