S71919 CD/P4AQBCC
Sealed Super Precision Angular Contact Ball Bearings
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S71919 CD/P4AQBCC Bearing Product Overview & Core Advantages
The S71919 CD/P4AQBCC is a high-precision quadruplex back-to-back angular contact ball bearing designed for demanding applications requiring exceptional rigidity and accuracy. This matched set of four bearings delivers superior performance in handling combined radial and axial loads from multiple directions. Manufactured to P4A tolerance class, it ensures minimal runout and vibration, making it ideal for high-speed, high-rigidity spindles. The phenolic cage and pre-lubrication with grease contribute to its reliable operation in a wide temperature range from -30°C to 110°C.
S71919 CD/P4AQBCC Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| S71919 | Basic bearing designation indicating a 95mm bore, 130mm OD, 72mm width angular contact ball bearing. |
| CD | Indicates a 15° contact angle and specific internal design optimized for high-speed operation. |
| P4A | Denotes super-precision tolerance class with enhanced running accuracy beyond ABEC 7 standards. |
| QBCC | Specifies Quadruplex Back-to-Back arrangement (QBC) with moderate preload (Class C) for maximum system rigidity. |
S71919 CD/P4AQBCC Bearing Structural Features & Performance Benefits
Exceptional Rigidity: The quadruplex back-to-back configuration creates an extremely rigid bearing system capable of resisting complex moment loads and shaft deflection, crucial for maintaining precision under heavy cutting forces.
Superior Load Capacity: With a dynamic load rating of 29,250 lbf and static load rating of 49,500 lbf, this bearing set handles significant combined radial and axial loads simultaneously, thanks to the optimized 15° contact angle.
High-Speed Capability: The phenolic resin cage provides excellent strength-to-weight ratio and smooth operation at the limiting speed of 21,000 rpm, while the precision-ground chrome steel components minimize friction and heat generation.
Pre-optimized Performance: As a factory-matched set of four bearings with moderate preload, it ensures consistent performance without requiring complex on-site adjustment, reducing installation time and potential errors.
S71919 CD/P4AQBCC Bearing Typical Application Areas
- High-speed machining centers and CNC milling spindles
- Precision grinding machine spindles requiring extreme accuracy
- High-performance rotary tables and indexing heads
- Aerospace manufacturing equipment spindles
- Medical device manufacturing machinery
- High-frequency motor spindles for PCB drilling and routing
