71907 CDGA/P4A
71900 Series Super Precision Angular Contact Ball Bearings
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71907 CDGA/P4A Bearing Product Overview & Core Advantages
The 71907 CDGA/P4A is a single-row angular contact ball bearing engineered for high-precision applications demanding exceptional rotational accuracy and reliability. Operating under the stringent P4A tolerance class, this bearing is designed to accommodate primarily axial loads in one direction while simultaneously handling moderate radial loads. Its extra light preload (Class A) ensures minimal deflection and smooth operation, making it ideal for high-speed spindles and precision machinery. The bearing comes pre-lubricated and features an open seal type for optimal performance in controlled environments.
71907 CDGA/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71907 | Basic bearing designation indicating angular contact type and metric dimensions (35mm bore, 55mm OD, 10mm width) |
| C | 15° contact angle design optimized for combined load capacity |
| DG | Universal matching designation - bearings can be mounted in any combination |
| A | Extra light preload classification for minimal deflection and vibration |
| P4A | Super precision tolerance class ensuring exceptional running accuracy |
71907 CDGA/P4A Bearing Structural Features & Performance Benefits
Precision Engineering: Manufactured to P4A tolerance standards with bore and outside diameter tolerances of -0.004mm to 0, ensuring exceptional dimensional stability and running accuracy.
High-Speed Capability: The phenolic resin cage and optimized internal geometry enable operation at limiting speeds up to 56,000 rpm, making it suitable for demanding spindle applications.
Superior Load Capacity: With a 15° contact angle and 21 high-precision chrome steel balls, this bearing delivers excellent combined load capacity (radial dynamic: 2194 lbf, static: 1474 lbf) while maintaining precision.
Thermal Stability: The phenolic cage material provides excellent dimensional stability across the operating temperature range of -30°C to 110°C.
Universal Matching: Designated as Universal Matchable (SU), these bearings can be arranged in various configurations (back-to-back, face-to-face, or tandem) to meet specific application requirements.
71907 CDGA/P4A Bearing Typical Application Areas
- Machine Tool Spindles - High-speed milling and grinding spindles requiring P4A precision
- Precision Instrumentation - Measuring equipment and optical devices demanding minimal runout
- High-Speed Motors - Servo motors and spindle drives in industrial automation
- Aerospace Components - Guidance systems and auxiliary equipment requiring reliability
- Medical Equipment - Dental handpieces and laboratory instruments needing precision rotation
