71907 ACDGB/P4A
71900 Series Super Precision Angular Contact Ball Bearings
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Main Dimensions
Ball & Washer Dimensions
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71907 ACDGB/P4A Bearing Product Overview & Core Advantages
The 71907 ACDGB/P4A is a single-row angular contact ball bearing designed for high-precision and high-speed applications. Engineered to a P4A tolerance class, it delivers exceptional dimensional accuracy and running precision. Its key advantage lies in its ability to accommodate combined loads—primarily thrust loads in one direction—while maintaining high rigidity and operational stability. The bearing is universally matchable (SU), allowing it to be paired with another identical bearing to form a rigid, preloaded set capable of handling bidirectional axial loads. Its compact design, featuring a 35 mm bore and 10 mm width, makes it ideal for space-constrained, high-performance machinery.
71907 ACDGB/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71907 | Basic bearing series and size designation (35mm bore, 55mm OD, 10mm width). |
| AC | Angular Contact design with a 25° contact angle. |
| DGB | Duplex arrangement designation, indicating the bearing is Universal Matchable (SU) and intended for Light Preload (Class B) when mounted in a back-to-back (DB) or face-to-face (DF) configuration. |
| P4A | Indicates a high-precision tolerance class with enhanced dimensional and running accuracy specifications. |
71907 ACDGB/P4A Bearing Structural Features & Performance Benefits
Optimized Contact Angle & Load Capacity: The 25° contact angle is optimized to support significant axial loads in one direction while also handling radial loads. With a dynamic load rating of 2077 lbf and a static load rating of 1395 lbf, it offers reliable performance under demanding conditions.
High-Speed Capability: The phenolic resin cage and precision-ground chrome steel components contribute to low friction and high stability, enabling a limiting speed of 56,000 rpm. This makes it an excellent high-speed bearing.
Precision & Rigidity: Manufactured to P4A tolerances, the bearing ensures minimal runout and vibration. When used in a matched set, the arrangement provides high system rigidity, which is critical for applications requiring precise shaft positioning.
Material & Lubrication: Constructed from high-grade chrome steel for rings and balls, the bearing offers high durability. It is supplied lubricated and is suitable for a temperature range of -30°C to 110°C.
71907 ACDGB/P4A Bearing Typical Application Areas
The 71907 ACDGB/P4A is ideally suited for high-performance machinery requiring precision and speed, including:
- Machine Tool Spindles
- High-Frequency Motors
- Precision Grinding Spindles
- Industrial Pumps and Compressors
- Robotic Drives and Actuators
