71907 ACB/HCP4ADGA
Hybrid Ceramic Super Precision Bearings
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71907 ACB/HCP4ADGA Bearing Product Overview & Core Advantages
The 71907 ACB/HCP4ADGA is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and performance. As a universal matchable (SU) bearing supplied in a pre-set pair, it is engineered to accommodate combined loads—simultaneously handling significant radial and axial loads. Its core advantages stem from a P4A super-precision tolerance class, a ceramic ball and phenolic cage construction, and an extra light preload (Class A). This combination delivers superior high-speed capability, excellent rigidity, and reliable operation in high-performance systems.
71907 ACB/HCP4ADGA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71907 | Basic bearing series and size designation (35mm bore, 55mm OD, 20mm width). |
| ACB | Angular Contact Bearing with a 25° contact angle. |
| HC | Hybrid Ceramic, indicating the use of ceramic balls for reduced friction and heat generation. |
| P4A | Denotes a super-precision tolerance class, exceeding ABEC 7/ISO P4 standards for exceptional running accuracy. |
| DGA | Universal Matchable (SU) arrangement in a Duplex "Back-to-Back" (DB) configuration, supplied as a pre-set pair. |
71907 ACB/HCP4ADGA Bearing Structural Features & Performance Benefits
- High Rigidity and Load Capacity: The universal matchable (SU) duplex pair configuration provides exceptional system rigidity, enabling the bearing set to withstand combined radial and axial loads from both directions.
- Superior High-Speed Performance: The combination of ceramic balls (lower density, reduced centrifugal force) and a lightweight phenolic cage significantly lowers operating friction and temperature, allowing for a high limiting speed of 56,000 rpm.
- Enhanced Precision and Longevity: The P4A tolerance class ensures minimal runout and vibration for ultra-smooth operation. The open seal type is optimized for clean environments and is supplied pre-lubricated for immediate use, contributing to a long service life.
- Thermal Stability: The phenolic cage and ceramic balls offer superior dimensional stability across the specified temperature range (-30°C to 110°C).
71907 ACB/HCP4ADGA Bearing Typical Application Areas
This high-performance bearing is ideally suited for applications where high speed, precision, and rigidity are paramount. Key industries and equipment include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Robotics: Arm joints and high-accuracy actuators.
- High-Frequency Motors and Spindles
- Medical and Dental Equipment: High-speed handpieces and scanners.
- Aerospace Instrumentation: Gyroscopes and navigation systems.
