7208 CDGB/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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7208 CDGB/P4A Bearing Product Overview & Core Advantages
The 7208 CDGB/P4A is a single-row angular contact ball bearing engineered for precision applications requiring exceptional rotational accuracy and high-speed performance. Manufactured to P4A tolerance class, this bearing delivers superior dimensional stability and running accuracy. Its 15° contact angle is optimized to handle significant combined loads, efficiently supporting both radial and axial forces. The phenolic cage and universal matching (SU) capability make it ideal for high-precision spindle arrangements where high rigidity and minimal thermal expansion are critical.
7208 CDGB/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7208 | Basic bearing series: Angular contact ball bearing with 40mm bore, 80mm OD |
| C | 15° contact angle design |
| D | Light preload (Class B) |
| GB | Universal matching bearing (SU designation) |
| P4A | High precision tolerance class with enhanced running accuracy |
7208 CDGB/P4A Bearing Structural Features & Performance Benefits
Precision Engineering: Manufactured to P4A tolerance class with tight dimensional control (bore/OD tolerance: -0.004mm to 0), ensuring exceptional running accuracy and minimal vibration.
High-Speed Capability: The phenolic cage provides excellent strength-to-weight ratio and reduced friction, enabling operation at limiting speeds up to 41,000 rpm.
Optimized Load Capacity: With a 15° contact angle design, this bearing efficiently handles combined radial and axial loads (dynamic rating: 7,605 lbf; static rating: 5,400 lbf).
Universal Matching: Designed as Universal Matchable (SU), these bearings can be precision-matched in sets of up to 4 bearings for optimal preload and stiffness in multi-bearing arrangements.
Material Excellence: Chrome steel rings and balls combined with phenolic cage construction ensure dimensional stability across the operating temperature range (-30°C to 110°C).
7208 CDGB/P4A Bearing Typical Application Areas
Machine Tool Spindles: High-precision machining centers, grinding spindles, and CNC milling machines requiring exceptional accuracy and rigidity.
High-Speed Motors: Precision electric motors, high-frequency spindles, and servo drives where minimal runout and thermal stability are critical.
Precision Instruments: Measuring equipment, optical scanners, and laboratory instruments demanding ultra-precise rotational characteristics.
Aerospace Systems: Gyroscopes, navigation equipment, and auxiliary power units requiring reliable performance under combined loading conditions.
Medical Equipment: Dental handpieces, laboratory centrifuges, and imaging systems where smooth operation and precision are essential.
