S71920 ACB/HCP4A
Hybrid Ceramic Super Precision Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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S71920 ACB/HCP4A Bearing Product Overview & Core Advantages
The S71920 ACB/HCP4A is a high-precision double row angular contact ball bearing designed for applications demanding exceptional accuracy and reliability. Engineered to simultaneously handle combined loads (radial and bidirectional axial loads), this bearing features a compact design ideal for space-constrained, high-performance systems. Its P4 (ABEC-7) tolerance class and ceramic ball construction ensure superior running accuracy and are optimized for high-speed operation. The preloaded, sealed, and lubricated design delivers immediate, maintenance-free performance with high rigidity and long service life.
Model Code Breakdown
- S: Bearing series designation
- 71920: Standard size designation (100mm bore, 140mm OD, 20mm width)
- ACB: Angular Contact Bearing with a 25° contact angle
- HCP4A: High-Precision P4 (ABEC-7) tolerance class with specific internal preload and clearance specifications
S71920 ACB/HCP4A Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The double row design and 25° contact angle provide high rigidity, enabling the bearing to support significant combined radial and axial loads from both directions.
High-Speed Performance: The combination of ceramic balls (lower density, reduced centrifugal force) and a lightweight phenolic cage allows for a high limiting speed of 13,000 rpm, minimizing friction and heat generation.
Precision & Longevity: Manufactured to P4 tolerance with a sealed and pre-lubricated design, this bearing ensures consistent, high-accuracy rotation and is protected from contamination, offering a long, maintenance-free operational life within a wide temperature range of -30°C to 110°C.
S71920 ACB/HCP4A Bearing Typical Application Areas
The S71920 ACB/HCP4A is ideally suited for high-precision, high-speed machinery including:
- Machine Tool Spindles
- High-Frequency Motors
- Precision Grinding Equipment
- Medical and Laboratory Instrumentation
- Aerospace Actuation Systems
