7220 CD/P4A
7200 & 7300 Series Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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7220 CD/P4A Bearing Product Overview & Core Advantages
The 7220 CD/P4A is a single-row angular contact ball bearing designed for applications requiring exceptional precision and high-speed performance. Engineered to simultaneously handle radial loads and axial loads in one direction, this bearing features a 15° contact angle and is supplied with a P4 (ABEC-7) tolerance class for superior running accuracy. Its phenolic resin cage and pre-lubrication contribute to its high-speed capabilities, making it an ideal solution for high-rigidity, precision spindle systems where reliability is critical.
7220 CD/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7220 | Basic bearing designation (100mm bore, 180mm OD, 34mm width) |
| CD | Contact angle designation (15° contact angle) |
| P4A | Precision class (P4/ABEC-7) with specific tolerance modifications |
7220 CD/P4A Bearing Structural Features & Performance Benefits
High-Precision Design: Manufactured to P4 tolerance class with tight dimensional control (bore tolerance: -0.008mm to 0), ensuring minimal runout and vibration for precision applications.
Optimized Load Capacity: Features a 15° contact angle that provides excellent combination load handling with radial dynamic load rating of 35,100 lbf and static load rating of 30,825 lbf.
High-Speed Performance: The phenolic resin cage offers reduced weight and excellent high-speed stability, supporting limiting speeds up to 12,000 rpm.
Premium Material Construction: Manufactured from chrome steel for both rings and balls (25.4mm diameter, 15 balls), providing high hardness and durability with a temperature range of -30° to 110°C.
Preload Availability: Designed to accommodate preload for enhanced stiffness and precise rotational accuracy in demanding applications.
7220 CD/P4A Bearing Typical Application Areas
Machine Tool Spindles: High-precision machining centers, grinding spindles, and CNC milling machines requiring exceptional accuracy and speed.
High-Speed Motors: Precision electric motors, spindle motors, and high-frequency applications where minimal vibration is critical.
Precision Instrumentation: Medical equipment, measuring instruments, and optical devices demanding high rotational accuracy.
Aerospace Components: Aircraft instrumentation, guidance systems, and auxiliary power units requiring reliable high-speed operation.
Robotics and Automation: Industrial robots, precision positioning systems, and automated manufacturing equipment.
