71820 ACDGC/P4
71800 Series Super Precision Angular Contact Ball Bearings
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71820 ACDGC/P4 Bearing Product Overview & Core Advantages
The 71820 ACDGC/P4 is a single-row angular contact ball bearing designed for high-precision applications requiring superior rigidity and speed performance. Engineered to a P4 tolerance class, this bearing delivers exceptional running accuracy and dimensional stability. Its 25° contact angle is optimized to handle significant combined loads—both radial and axial—making it ideal for demanding installations where precision and reliability are paramount. The phenolic cage and universal matching capability further enhance its performance in high-speed spindle configurations.
71820 ACDGC/P4 Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71820 | Basic bearing designation with 100mm bore, 125mm OD |
| AC | Angular Contact design with 25° contact angle |
| DGC | Moderate preload (Class C) for optimal rigidity |
| P4 | High-precision tolerance class for superior running accuracy |
71820 ACDGC/P4 Bearing Structural Features & Performance Benefits
High Rigidity & Precision: The P4 tolerance class ensures minimal runout and vibration, while the moderate preload (Class C) provides excellent system stiffness without excessive friction.
Superior Load Capacity: With a 25° contact angle, this bearing efficiently handles combined radial and axial loads, featuring a dynamic load rating of 4770 lbf and static load rating of 6188 lbf.
High-Speed Performance: The phenolic cage enables stable operation at limiting speeds up to 15,000 rpm, reducing centrifugal forces and maintaining precision at high rotational velocities.
Universal Matching Capability: Designed as Universal Matchable (SU), these bearings can be paired in various configurations (back-to-back, face-to-face, or tandem) to meet specific application requirements.
71820 ACDGC/P4 Bearing Typical Application Areas
- Machine Tool Spindles: High-precision machining centers and grinding spindles
- High-Speed Motors: Industrial motors and servo drives requiring precision and speed
- Precision Instrumentation: Measuring equipment and optical devices
- Aerospace Components: Guidance systems and auxiliary power units
- Medical Equipment: Dental handpieces and laboratory automation systems
