71919 ACD/P4AQBCA
71900 Series Super Precision Angular Contact Ball Bearings
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71919 ACD/P4AQBCA Bearing Product Overview & Core Advantages
The 71919 ACD/P4AQBCA is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional rigidity and accuracy. This P4A tolerance class quadruplex set, arranged in a back-to-back (QBC) configuration, is engineered to handle significant combined loads (radial and axial) simultaneously. Its extra light preload (Class A) ensures minimal deflection and smooth operation, making it ideal for high-speed spindles and other precision machinery where high rigidity and dimensional stability are paramount.
71919 ACD/P4AQBCA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71919 | Standard bearing series and size designation (95mm bore, 130mm OD). |
| ACD | Angular Contact design with a 25° contact angle. |
| P4A | Indicates a high-precision tolerance class with strict running accuracy requirements. |
| QBC | Specifies the bearing is supplied as a Quadruplex (4 bearings) set in a Back-to-Back arrangement. |
71919 ACD/P4AQBCA Bearing Structural Features & Performance Benefits
Optimized for High Rigidity and Precision: The back-to-back quadruplex arrangement creates a highly rigid bearing system that effectively resists moment loads and shaft deflection. This configuration is critical for maintaining accuracy under heavy combined loads.
Superior Load Capacity: With a dynamic load rating of 27,225 lbf and a static load rating of 46,800 lbf, this bearing set is built to withstand significant operational stresses. The 25° contact angle is optimized for carrying substantial axial loads in addition to radial loads.
High-Speed Capability: The phenolic cage contributes to lower friction and higher limiting speeds (up to 16,000 rpm), making it suitable for high-speed applications. The open seal type allows for efficient lubrication management in controlled environments.
Pre-Configured Set: Supplied as a matched set of 4 bearings, this ensures optimal load distribution and performance straight from installation, eliminating the need for complex matching procedures.
71919 ACD/P4AQBCA Bearing Typical Application Areas
The 71919 ACD/P4AQBCA is specifically engineered for high-performance applications including:
- Machine Tool Spindles - High-speed milling, grinding, and turning centers
- Precision Rotary Tables - Indexing and positioning systems
- High-Frequency Spindles - PCB drilling and precision machining
- Industrial Robotics - High-accuracy rotary joints and arms
- Aerospace Test Equipment - Precision positioning and simulation systems
