71819 ACD/P4DGB
71800 Series Super Precision Angular Contact Ball Bearings
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71819 ACD/P4DGB Bearing Product Overview & Core Advantages
The 71819 ACD/P4DGB is a high-precision angular contact ball bearing designed for applications demanding exceptional accuracy and rigidity. Manufactured to P4 tolerance class, this bearing excels in handling combined loads (simultaneous radial and axial loads) with high reliability. Its universal matchable (SU) design allows for flexible mounting in preloaded sets, providing optimized stiffness and rotational accuracy. The phenolic cage and light preload (Class B) contribute to superior high-speed performance, making it ideal for precision spindles and other demanding machinery.
71819 ACD/P4DGB Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning | Advantage |
|---|---|---|
| ACD | 25° Contact Angle, High Rigidity Design | Optimized for handling significant axial loads and providing high system stiffness |
| P4 | P4 Tolerance Class (High Precision) | Exceptional dimensional and running accuracy for precision applications |
| DGB | Universal Matchable (SU), Light Preload (Class B) | Enables flexible arrangement in pairs or sets for optimized preload and rigidity |
71819 ACD/P4DGB Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The 25° contact angle and optimized internal geometry enable the bearing to handle significant combined radial and axial loads. When mounted in universal match (SU) pairs, the bearing set provides enhanced system stiffness critical for precision applications.
High-Speed Capability: The phenolic resin cage offers excellent strength-to-weight ratio and smooth operation at high speeds, contributing to the bearing's limiting speed of 15,000 rpm. The light preload (Class B) further minimizes friction and heat generation.
Precision Performance: Manufactured to P4 tolerance class with tight dimensional controls (bore and OD tolerance: -0.004mm to 0), this bearing ensures minimal runout and vibration for superior rotational accuracy.
Optimized Internal Design: With 32 precision balls of 7.144 mm diameter made from chrome steel, the bearing provides high dynamic load capacity (7,605 lbf dynamic, 11,475 lbf static) and long service life.
71819 ACD/P4DGB Bearing Typical Application Areas
- Machine Tool Spindles: High-precision milling, grinding, and turning centers
- Precision Rotary Tables: Indexing and positioning systems
- High-Speed Machining Centers: Applications requiring both high RPM and accuracy
- Medical Equipment: Dental handpieces, surgical tools
- Robotics: Precision joints and rotary actuators
- Aerospace Components: Guidance systems, instrumentation
