S71924 ACD/HCP4A
Hybrid Ceramic Super Precision Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
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S71924 ACD/HCP4A Bearing Product Overview & Core Advantages
The S71924 ACD/HCP4A is a high-precision angular contact ball bearing engineered for demanding applications requiring exceptional accuracy and performance. This sealed bearing features a single, preloaded arrangement and is manufactured to a P4 (ABEC-7) tolerance class, ensuring minimal runout and superior rotational accuracy. Its core advantages include the ability to handle high combined loads (radial and axial) simultaneously, facilitated by a 25° contact angle. The use of ceramic balls and a phenolic cage contributes to lower friction, higher limiting speeds, and extended service life, making it an ideal choice for high-speed, high-rigidity spindles and precision machinery.
Model Code In-Depth Explanation
- S7: High-precision bearing series.
- 1924: Standard size designation (Bore: 120mm, OD: 165mm, Width: 22mm).
- ACD: Angular Contact design with a 25° contact angle and a preload applied.
- HCP4A: P4 (ABEC-7) tolerance class. The "A" suffix indicates specific internal geometry and preload level for optimized performance.
S71924 ACD/HCP4A Bearing Structural Features & Performance Benefits
High Rigidity and Precision: The preloaded single arrangement eliminates internal clearance, providing high system rigidity and precise shaft positioning, which is critical for machining accuracy.
Superior Load Capacity: The 25° contact angle is optimized to support significant combined loads, offering robust performance under complex loading conditions.
Enhanced High-Speed Performance: The combination of ceramic balls (lower density, reduced centrifugal force) and a lightweight phenolic cage allows for a very high limiting speed of 8,000 rpm, reducing heat generation and power loss.
Sealed and Lubricated for Life: The integral seals protect against contamination and retain the high-performance grease, making the bearing maintenance-free and reliable throughout its service life within the specified temperature range of -30° to 110 °C.
S71924 ACD/HCP4A Bearing Typical Application Areas
The S71924 ACD/HCP4A is ideally suited for high-performance applications where speed, precision, and reliability 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: Used in PCB drilling and semiconductor manufacturing equipment.
- Medical Equipment: Dental handpieces and imaging device rotors.
- Aerospace & Defense Systems: Gyroscopes, radar systems, and other precision instrumentation.
