71818 ACDGC/P4
71800 Series Super Precision Angular Contact Ball Bearings
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71818 ACDGC/P4 Bearing Product Overview & Core Advantages
The 71818 ACDGC/P4 is a high-precision angular contact ball bearing designed for applications demanding exceptional rigidity and rotational accuracy. Engineered with a 25° contact angle and P4 tolerance class, this bearing excels at handling combined radial and axial loads simultaneously. Its moderate preload (Class C) ensures minimal deflection under operational stresses, making it ideal for high-speed spindles and precision machinery where high rigidity and dimensional stability are critical. The phenolic cage and universal matching capability further enhance its performance in demanding environments.
71818 ACDGC/P4 Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71818 | Basic bearing series and size designation |
| AC | Angular Contact design with 25° contact angle |
| D | High ball quantity (31 balls) for increased load capacity |
| GC | Specific preload group: Moderate preload (Class C) |
| P4 | High-precision tolerance class for superior running accuracy |
71818 ACDGC/P4 Bearing Structural Features & Performance Benefits
Optimized Contact Design: The 25° contact angle provides excellent axial load capacity while maintaining substantial radial load capability, making it suitable for combined loads in both directions.
Precision Engineering: Manufactured to P4 tolerance class with tight dimensional controls (bore and OD tolerance: -0.004mm to 0), ensuring minimal runout and vibration for high-speed applications up to 15,000 rpm.
Advanced Cage Technology: The phenolic cage offers superior strength-to-weight ratio, reduced friction, and excellent performance at high rotational speeds.
Universal Matching Capability: Designed as Universal Matchable (SU), these bearings can be paired in sets of 2 to create preloaded arrangements without selective matching, simplifying installation and maintenance.
Enhanced Load Capacity: With 31 precision balls and optimized raceway geometry, the bearing delivers high dynamic load rating (4568 lbf) and static load capacity (5625 lbf) for demanding applications.
71818 ACDGC/P4 Bearing Typical Application Areas
- Machine Tool Spindles - High-speed machining centers and precision grinding machines
- Precision Robotics - Joint and arm mechanisms requiring high rigidity and accuracy
- Medical Equipment - CT scanners, dental drills, and laboratory instrumentation
- Aerospace Systems - Guidance systems, actuators, and auxiliary power units
- High-Speed Motors - Servo motors, spindle motors, and precision drive systems
- Optical Instrumentation - Measuring devices and precision positioning systems
