71900 ACDGB/P4A
71900 Series Super Precision Angular Contact Ball Bearings
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71900 ACDGB/P4A Bearing Product Overview & Core Advantages
The 71900 ACDGB/P4A is a single-row angular contact ball bearing engineered for high-precision applications requiring exceptional rotational accuracy and rigidity. Manufactured to P4A tolerance class, this bearing is designed to accommodate primarily axial loads in one direction and combined loads. Its compact design, featuring a 10 mm bore and 6 mm width, makes it ideal for space-constrained, high-speed spindles and precision instruments. The light preload (Class B) ensures minimal deflection under operational stresses, contributing to superior running accuracy and system stability.
71900 ACDGB/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71900 | Basic bearing series, indicating a metric, single-row angular contact design with a 10mm bore. |
| AC | Angular Contact design with a 25° contact angle. |
| DGB | Universal Matchable (SU) bearing. It can be universally matched with other bearings of the same code in sets (commonly 2 or 3 bearings) to support combined loads. |
| P4A | Indicates a high-precision tolerance class with enhanced dimensional and running accuracy specifications. |
71900 ACDGB/P4A Bearing Structural Features & Performance Benefits
High Precision and Rigidity: The P4A tolerance class ensures extremely tight dimensional control on the bore diameter, outside diameter, and width, leading to superior running accuracy. The 25° contact angle and light preload provide high axial rigidity and minimize system deflection.
Optimized for High-Speed Operation: The phenolic cage is lightweight and possesses excellent sliding properties, contributing to low friction and enabling a high limiting speed of 165,000 rpm. The 12 high-grade chrome steel balls are precision-sized (3.175 mm) for smooth, balanced rotation.
Superior Load Capacity: Designed as an angular contact bearing, it efficiently handles combined (radial and axial) loads. The dynamic load rating of 544 lbf and static load rating of 238 lbf ensure reliable performance under demanding conditions.
Universal Matching Capability: The DGB suffix signifies that this bearing is universally matchable. Multiple bearings can be mounted in pairs or triplex sets (as specified: 3 bearings in a matched set) without selective assembly, simplifying installation and providing pre-configured load sharing.
71900 ACDGB/P4A Bearing Typical Application Areas
The 71900 ACDGB/P4A is ideally suited for high-performance applications where precision, speed, and rigidity are paramount. Key industries and equipment include:
- Machine Tool Spindles: High-speed machining centers, grinding spindles.
- Precision Instruments: Measuring devices, optical scanners.
- High-Speed Motors and Drives: Servo motors, spindle drives.
- Robotics: Joints and arms requiring high accuracy and responsiveness.
