S71918 ACD/HCP4AQBCC
Hybrid Ceramic Super Precision Bearings
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Main Dimensions
Ball & Washer Dimensions
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S71918 ACD/HCP4AQBCC Bearing Product Overview & Core Advantages
The S71918 ACD/HCP4AQBCC is a high-precision quadruplex matched bearing set designed for demanding applications requiring exceptional rigidity and accuracy. This metric angular contact ball bearing configuration features a back-to-back arrangement (QBC), enabling it to withstand combined radial and axial loads from both directions simultaneously. Manufactured to P4A tolerance class with ceramic balls and phenolic cage, it delivers superior high-speed performance, thermal stability, and extended service life in precision machinery.
S71918 ACD/HCP4AQBCC Bearing Model Code Explained, Specifications & Naming Convention
- S7: High-precision angular contact ball bearing series
- 1918: Standard dimension series (90mm bore, 125mm OD, 72mm width)
- ACD: 25° contact angle design
- HCP4A: P4A tolerance class with enhanced running accuracy
- QB: Quadruplex back-to-back matched set
- CC: Ceramic balls (hybrid construction)
S71918 ACD/HCP4AQBCC Bearing Structural Features & Performance Benefits
Exceptional Rigidity: The quadruplex back-to-back configuration creates a highly rigid bearing system that minimizes deflection under complex loading conditions, making it ideal for applications requiring precise shaft positioning.
Superior Load Capacity: With a radial dynamic load rating of 26,325 lbf and radial static load rating of 43,425 lbf, this bearing set handles significant combined loads while maintaining precision.
High-Speed Capability: The combination of ceramic balls reducing centrifugal forces, phenolic cage for reduced friction, and grease lubrication enables a limiting speed of 15,000 rpm, suitable for high-speed spindle applications.
Precision Performance: Manufactured to P4A tolerance class with 25° contact angle, this bearing delivers exceptional running accuracy and minimal vibration for critical applications.
S71918 ACD/HCP4AQBCC Bearing Typical Application Areas
This high-precision bearing set is specifically engineered for applications requiring maximum rigidity and accuracy:
- Machine tool spindles for high-speed milling and grinding operations
- Precision grinding machines requiring minimal runout and vibration
- High-speed machining centers with demanding accuracy requirements
- Aerospace positioning systems needing reliable performance under complex loads
- Medical equipment spindles where precision and reliability are critical
- Robotic arm joints requiring high rigidity and positioning accuracy
