71901 CD/HCP4ADBA
Hybrid Ceramic Super Precision Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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71901 CD/HCP4ADBA Bearing Product Overview & Core Advantages
The 71901 CD/HCP4ADBA is a precision duplex angular contact ball bearing designed for applications requiring exceptional rotational accuracy and rigidity. This matched back-to-back (DB) arrangement provides superior stability and can accommodate combined radial and axial loads. Manufactured to P4A tolerance class with a 15° contact angle and ceramic balls, it delivers outstanding high-speed performance, reduced heat generation, and extended service life, making it ideal for high-precision, high-reliability machinery.
71901 CD/HCP4ADBA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71901 | Bearing series and size designation (12mm bore, 24mm OD) |
| C | 15° contact angle |
| D | Duplex arrangement |
| HC | Hybrid Ceramic (Silicon Nitride balls) |
| P4A | High precision tolerance class (equivalent to ABEC 7) |
| DB | Back-to-Back mounting |
| A | Extra light preload |
71901 CD/HCP4ADBA Bearing Structural Features & Performance Benefits
Enhanced Rigidity & Load Capacity: The duplex back-to-back configuration creates a rigid bearing system that effectively resists moment loads and provides stable support for shafts. This arrangement enables the bearing to handle significant combined radial and axial loads simultaneously.
Superior High-Speed Performance: The combination of ceramic balls and phenolic resin cage enables exceptional high-speed operation up to 140,000 rpm. Ceramic balls reduce centrifugal forces, minimize friction, and provide excellent dimensional stability under thermal expansion.
Precision Engineering: Manufactured to P4A tolerance class with tight dimensional control (bore and OD tolerance: -0.004mm to 0), this bearing ensures minimal runout and vibration for applications demanding the highest rotational accuracy.
Optimal Material Selection: The hybrid construction with chrome steel rings and silicon nitride balls offers superior corrosion resistance, electrical insulation properties, and extended service life compared to all-steel bearings.
71901 CD/HCP4ADBA Bearing Typical Application Areas
This high-precision duplex angular contact bearing is specifically designed for demanding applications including:
- High-speed machine tool spindles and machining centers
- Precision grinding spindles and dental handpieces
- Robotic joints and automation equipment
- Aerospace instrumentation and navigation systems
- Medical device motors and laboratory equipment
- Semiconductor manufacturing equipment
