7215 CDGA/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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Product Overview and Core Advantages
The 7215 CDGA/P4A is a single-row angular contact ball bearing designed for ultra-precision applications requiring exceptional rotational accuracy and high-speed performance. Manufactured to P4A tolerance class with an extra light preload (Class A), this bearing delivers superior running precision and minimal vibration. Its 15° contact angle provides optimal performance for combined radial and axial loads, while the phenolic cage enables stable operation at limiting speeds up to 22,000 rpm. This bearing is universal matchable (SU), allowing precise axial clearance adjustment when mounted with other bearings.
7215 CDGA/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Performance Impact |
|---|---|---|
| 7215 | Basic bearing size: 75mm bore, 130mm OD, 25mm width | Standard dimension series for medium-duty applications |
| CDGA | Contact angle 15°, phenolic cage, universal matchable | Optimized for combined loads and high-speed operation |
| P4A | ABEC 7 precision grade with specific running accuracy | Ultra-precision performance for demanding applications |
Structural Features and Performance Benefits
Precision Engineering: The P4A tolerance class ensures minimal dimensional variations, providing exceptional running accuracy and reduced vibration levels critical for high-speed applications.
High-Speed Capability: The phenolic cage material offers excellent strength-to-weight ratio and dimensional stability at high rotational speeds, contributing to the bearing's 22,000 rpm limiting speed.
Optimized Load Distribution: With a 15° contact angle and 17 precision balls of 15.875mm diameter, this bearing efficiently handles combined radial and axial loads while maintaining smooth operation.
Thermal Stability: The phenolic cage and chrome steel construction maintain dimensional stability across the operating temperature range of -30°C to 110°C.
Preload Configuration: The extra light preload (Class A) minimizes friction while maintaining shaft rigidity, ideal for precision spindle applications.
7215 CDGA/P4A Bearing Typical Application Areas
- Machine Tool Spindles: High-precision machining centers, grinding spindles, and CNC milling machines
- Precision Instrumentation: Measuring equipment, optical instruments, and laboratory apparatus
- High-Speed Motors: Industrial spindle motors, high-frequency motors, and precision drive systems
- Aerospace Components: Guidance systems, aircraft instruments, and satellite mechanisms
- Medical Equipment: Dental handpieces, surgical tools, and diagnostic imaging systems
