S7018 CDGA/P4A
Sealed Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
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S7018 CDGA/P4A Bearing Product Overview & Core Advantages
The S7018 CDGA/P4A is a super-precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and high-speed performance. As a universal matchable (SU) bearing supplied in sets of three, it enables optimized preload configurations for maximum system rigidity. Its P4A tolerance class ensures extremely tight dimensional control, while the phenolic cage and specialized grease lubrication support high limiting speeds up to 15,000 rpm. This bearing is engineered to handle combined radial and axial loads simultaneously, making it ideal for high-precision spindles and other critical rotating assemblies.
S7018 CDGA/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| S7018 | Super-precision angular contact ball bearing series with 90mm bore diameter |
| CD | 15° contact angle design for optimal load distribution |
| G | Phenolic resin cage for high-speed operation |
| A | Extra light preload class for minimal friction |
| /P4A | Ultra-precision tolerance class exceeding ABEC 7 standards |
S7018 CDGA/P4A Bearing Structural Features & Performance Benefits
High Rigidity & Precision: The double-row angular contact design provides superior radial and axial stiffness, while the P4A tolerance class ensures exceptional running accuracy with bore and OD tolerances of -0.004mm to 0.
Optimized Load Capacity: With a 15° contact angle and 20 chrome steel balls of 15.875mm diameter, this bearing delivers excellent combined load handling capability (17,842 lbf dynamic, 17,212 lbf static ratings).
Superior High-Speed Performance: The phenolic cage reduces centrifugal forces and friction, enabling limiting speeds of 15,000 rpm. The pre-applied high-performance grease ensures reliable lubrication across the operating temperature range of -30°C to 110°C.
Universal Matching Capability: As part of a matched set of three bearings with SU designation, they can be arranged in back-to-back, face-to-face, or tandem configurations to achieve optimal preload and system performance.
S7018 CDGA/P4A Bearing Typical Application Areas
- Machine Tool Spindles: High-precision milling, grinding, and turning centers
- High-Speed Machining Centers: CNC equipment requiring extreme accuracy
- Precision Instrumentation: Measuring devices and laboratory equipment
- Robotic Systems: High-accuracy robot joints and rotary tables
- Medical Equipment: Dental handpieces and surgical tool rotors
- Aerospace Components: Gyroscopes and navigation system assemblies
