71915 ACD/P4ATBTB
71900 Series Super Precision Angular Contact Ball Bearings
Image may differ from product. See technical specification for details.
Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
- Fast delivery
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
71915 ACD/P4ATBTB Bearing Product Overview & Core Advantages
The 71915 ACD/P4ATBTB is a super-precision angular contact ball bearing designed for the most demanding applications. Its primary advantage lies in its triplex back-to-back (TBT) matched arrangement, which provides exceptional system rigidity and stability under complex loading conditions. This configuration is optimized to handle significant combined loads (radial and axial) simultaneously, making it an ideal choice for high-precision, high-speed spindles where accuracy and reliability are paramount. Manufactured to a P4A tolerance class, it guarantees ultra-precise running accuracy and consistent performance.
71915 ACD/P4ATBTB 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 | Indicates a super-precision tolerance class, superior to ABEC 7, ensuring minimal runout and vibration. |
| TBT | Specifies a Triplex Back-to-Back matched set of three bearings, pre-configured for optimal rigidity and moment load capacity. |
| B | Denotes a Light preload applied to the set, which minimizes deflection and maximizes system stiffness. |
71915 ACD/P4ATBTB Bearing Structural Features & Performance Benefits
- High Rigidity & Stability: The triplex back-to-back (TBT) arrangement creates a highly rigid bearing system that effectively resists moment loads and shaft deflection, crucial for maintaining precision under heavy combined loads.
- Superior Load Capacity: With a dynamic load rating of 16,380 lbf and a static load rating of 23,850 lbf, this bearing set is engineered for demanding applications requiring high load-carrying capability.
- Optimized High-Speed Performance: The phenolic resin cage is lightweight and robust, contributing to lower centrifugal forces and enabling a high limiting speed of 22,000 rpm. The 25° contact angle provides an excellent balance between radial and axial load capacity for high-speed operation.
- Precision Engineering: The P4A tolerance class and tight dimensional tolerances on the bore, outside diameter, and width ensure exceptional running accuracy, low noise, and minimal vibration.
- Material Quality: Constructed from high-grade chrome steel for both rings and balls, ensuring long service life and consistent performance under a wide temperature range (-30°C to 110°C).
71915 ACD/P4ATBTB Bearing Typical Application Areas
This super-precision angular contact ball bearing is specifically designed for high-performance machinery where extreme accuracy, high speed, and rigidity are non-negotiable. Key applications include:
- Machine Tool Spindles: High-speed machining centers, grinding spindles, and CNC milling machines.
- Precision Spindles: Applications in PCB drilling, semiconductor manufacturing, and other high-precision industrial equipment.
- High-Frequency Motors: Spindles for routers and other high-RPM electric motors.
- Robotics: Critical joints and arm assemblies requiring high rigidity and precise movement.
