71828 ACD/P4DGB
71800 Series Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
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Materials
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Product Overview and Core Advantages
The 71828 ACD/P4DGB is a precision angular contact ball bearing designed for high-performance applications requiring exceptional rotational accuracy and rigidity. As part of the Universal Matchable (SU) series, it can be universally paired with other bearings to create optimized bearing arrangements. Its P4 tolerance class ensures superior dimensional and running accuracy, making it ideal for machine tool spindles and other high-speed, high-precision equipment. The bearing is pre-lubricated and features a light preload (Class B) for immediate operational readiness and reduced vibration.
71828 ACD/P4DGB Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| ACD | 25° Contact Angle and optimized internal design for handling combined radial and axial loads |
| P4 | High-Precision Tolerance Class for applications requiring extreme running accuracy |
| DGB | Universal Matchable (SU) bearing designed for arrangement in pairs (2 bearings in set) |
Structural Features and Performance Benefits
High Rigidity and Load Capacity: The 25° contact angle and precision-ground raceways enable the bearing to handle significant combined loads (radial and axial) simultaneously, providing stable and rigid support for rotating components.
Precision Performance: Manufactured to P4 tolerance class standards, this bearing delivers exceptional running accuracy and minimal rotational vibration, which is critical for maintaining machining precision and surface finish quality.
Optimized High-Speed Operation: The phenolic cage offers excellent strength-to-weight ratio and operates smoothly at high speeds, contributing to the bearing's limiting speed of 11,000 rpm. The 25° contact angle is well-suited for high-speed applications.
Universal Matching Capability: As a Universal Matchable (SU) bearing, it can be universally paired in any combination (back-to-back, face-to-face, or tandem) without requiring selective matching, simplifying installation and inventory management.
71828 ACD/P4DGB Bearing Typical Application Areas
- Machine Tool Spindles: High-speed milling, grinding, and turning centers requiring high rigidity and precision
- Precision Gearboxes: Industrial transmissions and reducers where accurate shaft positioning is critical
- High-Speed Motors: Electric motors and generators operating at elevated speeds
- Pumps and Compressors: Centrifugal pumps and compressor systems handling axial and radial loads
- Robotics and Automation: Precision joints and rotary axes in industrial robots
