71917 ACDGB/P4A
71900 Series Super Precision Angular Contact Ball Bearings
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71917 ACDGB/P4A Bearing Product Overview & Core Advantages
The 71917 ACDGB/P4A is a single-row angular contact ball bearing designed for applications demanding high precision and exceptional rotational accuracy. Operating under a light preload (Class B), this bearing is optimized to handle significant combined loads, primarily thrust loads in one direction, while also supporting substantial radial loads. Its P4A tolerance class ensures superior dimensional and running accuracy, making it ideal for high-speed spindles and precision machinery. The universal matchable (SU) design allows for flexible mounting arrangements in pairs to accommodate complex load requirements.
71917 ACDGB/P4A Bearing Model Code Explained, Specifications & Naming Convention
| 71917 | Basic bearing series and size designation (85mm bore, 120mm OD, 18mm width) |
| AC | Angular Contact design with a 25° contact angle |
| D | High internal capacity design |
| GB | Light preload / Class B |
| P4A | High precision tolerance class exceeding ABEC 7 standards |
71917 ACDGB/P4A Bearing Structural Features & Performance Benefits
Precision Engineering: Manufactured to P4A tolerance class with tight dimensional controls (bore/OD tolerance: -0.004mm to 0), ensuring minimal runout and vibration for high-speed applications up to 28,000 rpm.
Optimized Load Capacity: The 25° contact angle and robust chrome steel construction provide excellent thrust load capacity while maintaining substantial radial load capability (dynamic: 9810 lbf, static: 10238 lbf).
High-Speed Performance: The phenolic resin cage offers superior strength-to-weight ratio, reduced friction, and excellent performance at high rotational speeds with minimal centrifugal forces.
Thermal Stability: Operating temperature range of -30°C to 110°C ensures reliable performance across various environmental conditions.
Precision Matching: As a universal matchable bearing, it can be paired with another identical bearing in various configurations to handle complex loading scenarios.
71917 ACDGB/P4A Bearing Typical Application Areas
- Machine Tool Spindles - High-speed machining centers and precision grinding applications
- Precision Instrumentation - Medical equipment and measuring devices requiring exceptional accuracy
- High-Speed Motors - Industrial motors and spindle drives operating at elevated speeds
- Aerospace Components - Guidance systems and auxiliary power units
- Robotics - Precision joints and articulation points in industrial robots
