S71902 ACD/HCP4ADBA
Hybrid Ceramic Super Precision Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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S71902 ACD/HCP4ADBA Bearing Product Overview & Core Advantages
The S71902 ACD/HCP4ADBA is a precision duplex angular contact ball bearing designed for exceptional performance in demanding applications. This metric series bearing features a back-to-back (DB) matched arrangement and is manufactured to super-precision P4A tolerance class. Its core advantages include the ability to handle combined radial and axial loads simultaneously, outstanding high-speed capabilities up to 95,000 rpm, and superior rigidity due to its duplex preloaded configuration. The use of ceramic balls and a phenolic cage further enhances its performance in high-speed, high-temperature environments, making it an ideal choice for applications requiring maximum accuracy and reliability.
S71902 ACD/HCP4ADBA Bearing Model Code Explained, Specifications & Naming Convention
- S7: High-precision bearing series
- 1902: Standard size designation (15mm bore, 28mm OD, 14mm width)
- ACD: Angular Contact, Duplex arrangement
- H: Ceramic balls (hybrid construction)
- C: Phenolic resin cage
- P4A: Super-precision tolerance class (exceeding ABEC 7)
- A: Extra light preload
- DB: Back-to-back mounting arrangement
- A: 25° contact angle
S71902 ACD/HCP4ADBA Bearing Structural Features & Performance Benefits
Hybrid Ceramic Construction: The combination of chrome steel rings with silicon nitride ceramic balls reduces centrifugal forces, minimizes friction, and provides superior performance at high speeds while offering electrical insulation properties.
Enhanced Rigidity & Load Capacity: The duplex back-to-back arrangement with extra light preload (Class A) delivers exceptional stiffness, enabling precise positioning and stable operation under combined loads. The bearing can withstand radial loads up to 1390 lbf and static loads up to 810 lbf.
Superior High-Speed Performance: The phenolic resin cage and ceramic balls work in synergy to achieve exceptional limiting speeds of 95,000 rpm, while the optimized 25° contact angle provides balanced load distribution for smooth high-speed operation.
Precision & Thermal Stability: Manufactured to P4A tolerance class with tight dimensional control (bore/OD tolerance: -0.004mm to 0), this bearing ensures minimal runout and consistent performance. The phenolic cage maintains dimensional stability across the operating temperature range of -30°C to 110°C.
S71902 ACD/HCP4ADBA Bearing Typical Application Areas
The S71902 ACD/HCP4ADBA is specifically engineered for high-performance applications requiring exceptional precision and speed, including:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers
- Precision Instrumentation: Measuring equipment, optical systems, and laboratory apparatus
- Semiconductor Manufacturing: Wafer handling robots, precision stages, and inspection equipment
- Medical Equipment: High-speed dental handpieces, surgical tools, and diagnostic instruments
- Aerospace Systems: Gyroscopes, navigation systems, and auxiliary power units
- High-Speed Motors: Spindle motors, turbo-molecular pumps, and specialized drive systems
