71936 ACD/P4AQBCC
71900 Series Super Precision Angular Contact Ball Bearings
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71936 ACD/P4AQBCC Bearing Product Overview & Core Advantages
The 71936 ACD/P4AQBCC is a precision angular contact ball bearing designed for demanding applications requiring exceptional rigidity and accuracy. This bearing is supplied as a Quadruplex Back-to-Back (QBC) matched set, comprising four individual bearings pre-arranged to deliver superior performance under combined loads. Its P4A tolerance class ensures ultra-precise running accuracy, making it ideal for high-speed spindles and other precision machinery where minimal runout and high operational stability are critical. The moderate preload (Class C) eliminates internal clearance, providing immediate rigid response to applied loads.
71936 ACD/P4AQBCC Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71936 | Basic bearing series and size designation |
| ACD | Angular Contact design with a 25° contact angle |
| P4A | High precision tolerance class exceeding ABEC 7/ISO P4 specifications |
| QBCC | Indicates a Quadruplex Back-to-Back (QBC) matched set of 4 bearings |
71936 ACD/P4AQBCC Bearing Structural Features & Performance Benefits
Unmatched Rigidity and Load Capacity: The Quadruplex Back-to-Back (QBC) arrangement creates an extremely rigid bearing system capable of withstanding heavy combined loads, including significant moment loads. This configuration provides a wide spread of load-bearing points, enhancing stability and system life.
High-Speed Capability: The phenolic cage offers excellent strength-to-weight ratio and operates effectively at high speeds with low friction. Combined with a 25° contact angle, the bearing is optimized for high rotational speeds while maintaining precision.
Precision Engineering: Manufactured to P4A tolerance class with tight dimensional controls on bore diameter, outside diameter, and width. This ensures predictable performance and easy integration into precision assemblies.
Robust Material Construction: Both rings and balls are made from chrome steel, providing high hardness, wear resistance, and durability under demanding operating conditions.
71936 ACD/P4AQBCC Bearing Typical Application Areas
This high-precision, high-rigidity bearing set is specifically engineered for advanced machinery and systems, including:
- High-Speed Machine Tool Spindles (milling, grinding, boring)
- Precision Grinding Machines
- Industrial Robotics and automation equipment
- Aerospace Test Equipment and positioning systems
- Medical Imaging Devices requiring precise rotation
