71907 CD/P4ADGA
71900 Series Super Precision Angular Contact Ball Bearings
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71907 CD/P4ADGA Bearing Product Overview & Core Advantages
The 71907 CD/P4ADGA is a super-precision angular contact ball bearing designed for applications demanding the highest levels of rotational accuracy and rigidity. Operating under a P4A tolerance class, this bearing is engineered to handle combined loads with exceptional performance. Its extra light preload (Class A) minimizes deflection under light loads, ensuring smooth, precise operation. The bearing is Universal Matchable (SU), allowing two bearings to be paired in a universal arrangement for optimal stiffness and load distribution, making it ideal for high-precision, high-rigidity applications.
71907 CD/P4ADGA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Significance |
|---|---|---|
| 71907 | Bearing series and size designation | Indicates a 35mm bore, 55mm OD, 20mm width angular contact bearing. |
| CD | Contact angle of 15° | Optimized for high-speed operation and moderate axial load capacity. |
| P4A | Super-precision tolerance class | Denotes extremely tight dimensional and running accuracy for critical applications. |
| DGA | Universal Matchable (SU) designation | Specifies that the bearing is part of a universally matchable pair for simplified mounting and optimal performance in tandem arrangements. |
71907 CD/P4ADGA Bearing Structural Features & Performance Benefits
High Rigidity and Precision: Manufactured to P4A tolerance class with an extra light preload, this bearing provides superior rotational accuracy and minimizes system deflection, crucial for maintaining precision under operational stresses.
Optimized Load Capacity: The 15° contact angle effectively handles combined radial and axial loads. When used in its intended Universal Matchable (SU) pair, the set provides significantly enhanced rigidity and load-sharing capabilities.
High-Speed Capability: The lightweight phenolic resin cage ensures stable operation and reduced centrifugal forces, contributing to the high limiting speed of 56,000 rpm. The open design allows for efficient lubrication management.
Material Integrity: Constructed from chrome steel for both rings and balls, the bearing offers high hardness, wear resistance, and a long operational life, suitable for a wide temperature range from -30°C to 110°C.
71907 CD/P4ADGA Bearing Typical Application Areas
The 71907 CD/P4ADGA is engineered for the most demanding precision machinery, including:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers requiring extreme accuracy and rigidity.
- Precision Robotics: Articulated arms and joints where minimal deflection and high positional repeatability are critical.
- High-Frequency Spindles: PCB drilling and routing equipment.
- Medical and Laboratory Equipment: Centrifuges and precision analytical instruments.
- Aerospace Positioning Systems: Gyroscopes and navigation equipment.
