71906 ACDGB/HCP4A
Hybrid Ceramic Super Precision Bearings
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71906 ACDGB/HCP4A Bearing Product Overview & Core Advantages
The 71906 ACDGB/HCP4A is a super-precision angular contact ball bearing designed for the most demanding high-speed and high-rigidity applications. As a single bearing with a Universal Matchable (SU) designation, it is supplied as one of a pair in a pre-set Light preload (Class B) duplex arrangement, ready for immediate installation to provide exceptional rotational accuracy and system stiffness. Its optimized 25° contact angle and ceramic ball construction enable superior performance in handling combined radial and axial loads while operating at extreme speeds with minimal heat generation.
71906 ACDGB/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71906 | Basic bearing series and size designation (30mm bore, 47mm OD) |
| AC | Angular Contact design with a 25° contact angle |
| DGB | Duplex arrangement, Ground back-to-back, Light preload (Class B) |
| HC | Hybrid Ceramic construction (Steel rings with Silicon Nitride balls) |
| P4A | Super-precision tolerance class (equivalent to ABEC 7) |
71906 ACDGB/HCP4A Bearing Structural Features & Performance Benefits
High-Speed Capability: The combination of ceramic balls and a lightweight phenolic cage significantly reduces centrifugal forces, enabling a limiting speed of 100,500 rpm. This hybrid design also minimizes friction and heat buildup.
Exceptional Rigidity & Load Capacity: The bearing is supplied as a pre-loaded duplex set (DGB), providing high system stiffness and precise axial positioning. It is engineered to handle significant combined loads from both radial and axial directions.
Ultra-Precision Performance: Manufactured to P4A tolerance class, this bearing ensures minimal runout and vibration, which is critical for maintaining accuracy in high-precision machinery.
Optimized for Universal Matching (SU): The Universal Matchable (SU) designation allows any two bearings to be mounted in a back-to-back (DB) or face-to-face (DF) arrangement without selective matching, simplifying inventory and assembly.
71906 ACDGB/HCP4A Bearing Typical Application Areas
- High-Speed Machine Tool Spindles: For CNC milling, grinding, and drilling centers requiring extreme rotational accuracy and speed.
- Precision Robotics: In robot arm joints and actuators where high rigidity and minimal deflection are critical.
- Aerospace & Defense Systems: In gyroscopes, navigation systems, and other instrumentation requiring reliable high-speed operation.
- Medical Equipment: For dental handpieces, high-speed centrifuges, and imaging device rotors.
- Semiconductor Manufacturing: In wafer handling robots and precision stages where contamination from lubrication must be avoided.
