71907 CE/HCP4ADGA
Hybrid Ceramic Super Precision Bearings
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71907 CE/HCP4ADGA Bearing Product Overview & Core Advantages
The 71907 CE/HCP4ADGA is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and performance. This universal matchable (SU) bearing is part of a matched set of 2, enabling simplified installation and optimized preload configuration. Its core advantages include superior high-speed capability with a limiting speed of 56,000 rpm, enabled by its ceramic balls and phenolic cage. The bearing is manufactured to a P4A tolerance class, ensuring extremely tight dimensional and running accuracy for applications where high rigidity
71907 CE/HCP4ADGA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Significance |
|---|---|---|
| 71907 | Basic bearing series and size designation | Indicates a high-precision, light series bearing with 35mm bore, 55mm OD, and 20mm width. |
| CE | Contact angle of 15° | Optimized for combined loads with a balanced ratio of radial and axial load capacity. |
| HC | Hybrid Ceramic (Silicon Nitride balls) | Provides lower density, reduced centrifugal forces, and superior high-speed performance. |
| P4A | Tolerance class (super precision) | Guarantees extremely tight dimensional and running accuracy for high-precision applications. |
| DGA | Universal Matchable (SU designation), Extra Light Preload (Class A) | Bearing can be mounted in any combination (DB, DF, DT) and comes with a minimal preload for low friction and high speeds. |
71907 CE/HCP4ADGA Bearing Structural Features & Performance Benefits
Hybrid Ceramic Construction: The use of silicon nitride (Si3N4) ceramic balls significantly reduces rotating mass and centrifugal forces. This results in lower operating temperatures, reduced friction, and dramatically enhanced high-speed performance compared to all-steel bearings.
Phenolic Resin Cage: The phenolic cage offers excellent dimensional stability, low weight, and superior guidance for the ceramic balls. It is well-suited for high-speed operation and provides good compatibility with the pre-applied lubrication.
Precision Ground Raceways: Manufactured to P4A super precision standards, the raceways on both rings ensure smooth, quiet operation with minimal vibration, contributing to the bearing's high rigidity and accuracy.
Universal Matchable Design (SU): This feature allows any two bearings from the same lot to be mounted together in any configuration (back-to-back, face-to-face, or tandem) without performance degradation, simplifying inventory and assembly for combined load applications.
71907 CE/HCP4ADGA Bearing Typical Application Areas
The 71907 CE/HCP4ADGA is engineered for high-performance machinery where speed, precision, and reliability are paramount. Key application areas include:
- High-Frequency Machine Tool Spindles: For CNC milling, grinding, and drilling where high rotational speeds and accuracy are required.
- Precision Robotics: Arm joints and rotary actuators demanding high rigidity and responsive motion control.
- Aerospace & Defense Systems: Gyroscopes, radar systems, and other instrumentation requiring exceptional reliability and speed.
- High-Speed Motors and Drives: Especially in electric vehicles and industrial servo motors.
- Medical Equipment: Dental handpieces and high-speed centrifuges.
