7218 CDGA/P4A
7200 & 7300 Series 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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7218 CDGA/P4A Bearing Product Overview & Core Advantages
The 7218 CDGA/P4A is a single-row angular contact ball bearing designed for ultra-precision applications requiring exceptional rotational accuracy and rigidity. Manufactured to P4A tolerance class with an Extra Light (Class A) preload, this bearing delivers superior running precision and minimal deflection under load. Its 15° contact angle provides optimal performance for combined radial and axial loads, while the universal matching (SU) capability allows for flexible mounting configurations in multi-bearing arrangements. The phenolic cage ensures smooth operation at high speeds up to 17,000 rpm.
7218 CDGA/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7218 | Basic bearing series with 90mm bore diameter |
| CDGA | Contact angle 15°, Universal Matchable (SU) design, Extra Light preload (Class A) |
| P4A | Ultra-precision tolerance class with enhanced running accuracy |
7218 CDGA/P4A Bearing Structural Features & Performance Benefits
Precision Engineering: The P4A tolerance class ensures minimal dimensional variation, providing exceptional rotational accuracy and consistent performance in demanding applications.
Optimized Load Capacity: With a 15° contact angle, this bearing efficiently handles combined radial and axial loads, featuring a dynamic load rating of 28,575 lbf and static load rating of 25,200 lbf.
High-Speed Performance: The phenolic resin cage reduces friction and enables smooth operation at limiting speeds up to 17,000 rpm, making it ideal for high-speed spindle applications.
Universal Matching Capability: As a Universal Matchable (SU) bearing, it can be mounted in various preload configurations (DB, DF, DT) when used in sets, providing design flexibility for precision arrangements.
Premium Material Construction: Manufactured from chrome steel for both rings and balls, ensuring high durability and long service life under demanding operating conditions.
7218 CDGA/P4A Bearing Typical Application Areas
- Machine Tool Spindles - High-precision machining centers and grinding spindles
- Precision Instrumentation - Measuring equipment and laboratory instruments
- High-Speed Motors - Industrial motors and servo drives requiring ultra-precision
- Aerospace Components - Guidance systems and flight control mechanisms
- Medical Equipment - Dental handpieces and surgical tool drives
- Robotics - Precision joints and articulation points in industrial robots
