S7018 ACD/P4AQBCB
Sealed Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
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Materials
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S7018 ACD/P4AQBCB Bearing Product Overview & Core Advantages
The S7018 ACD/P4AQBCB is a precision quadruplex matched bearing set designed for the most demanding industrial applications. This P4A tolerance class angular contact ball bearing configuration delivers exceptional rotational accuracy and system rigidity. Its quadruplex back-to-back (QBC) arrangement provides superior stability when handling complex combined loads, including significant radial and bidirectional axial forces. The sealed design with phenolic cage and factory-applied grease ensures reliable, long-term performance in high-speed precision machinery.
S7018 ACD/P4AQBCB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Performance Benefit |
|---|---|---|
| S7018 | Basic bearing series with 90mm bore | Standardized dimension interface |
| ACD | Angular Contact Design with 25° contact angle | Optimized for axial load capacity |
| P4A | High precision tolerance class | Exceptional running accuracy and minimal vibration |
| QBC | Quadruplex Back-to-Back configuration | Maximum rigidity and moment load capacity |
S7018 ACD/P4AQBCB Bearing Structural Features & Performance Benefits
Quadruplex Matched Set Design: Four bearings are precision-matched and pre-loaded in a back-to-back arrangement, creating an exceptionally rigid bearing system that resists deflection under heavy combined loads and moment forces.
Enhanced Load Capacity: With a radial dynamic load rating of 44,775 lbf and static load rating of 65,250 lbf, this configuration handles significant operational stresses while maintaining precision alignment.
High-Speed Capability: The phenolic cage material provides excellent strength-to-weight ratio, contributing to the limiting speed of 15,000 rpm while reducing centrifugal forces at high rotational velocities.
Pre-optimized Performance: Factory-applied grease lubrication and sealed construction ensure consistent performance without requiring additional setup or maintenance, operating effectively within a temperature range of -30°C to 110°C.
S7018 ACD/P4AQBCB Bearing Typical Application Areas
This high-precision quadruplex bearing set is specifically engineered for applications requiring maximum rigidity and accuracy:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers
- Precision Gearboxes: Industrial transmission systems requiring minimal deflection
- Aerospace Components: Flight control systems and auxiliary power units
- High-Rigidity Positioning Systems: Robotics, automation equipment, and coordinate measuring machines
- Specialized Industrial Machinery: Where precise axial positioning and moment load resistance are critical
