71918 ACD/HCP4AQBCC
Hybrid Ceramic Super Precision Bearings
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71918 ACD/HCP4AQBCC Bearing Product Overview & Core Advantages
The 71918 ACD/HCP4AQBCC is a metric system, precision angular contact ball bearing designed for high-performance applications. As part of a Quadruplex Back-to-Back (QBC) matched set, it is engineered to handle significant combined loads (radial and axial) simultaneously. Its P4A super-precision tolerance and ceramic ball construction deliver exceptional running accuracy, high rigidity, and superior high-speed capabilities, making it ideal for demanding, high-reliability machinery.
Model Code Breakdown
- 71918: Basic series designation for a high-precision, angular contact ball bearing.
- ACD: Angular Contact design with a 25° contact angle.
- HCP4A: Indicates the P4A tolerance class and specific internal design for high precision.
- QBCC: Denotes a Quadruplex Back-to-Back (QBC) matched set with a Moderate (Class C) preload.
71918 ACD/HCP4AQBCC Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The Quadruplex Back-to-Back (QBC) arrangement of four bearings creates an extremely rigid support system, capable of withstanding heavy combined loads and moments. The 25° contact angle is optimized for sustaining high axial loads in both directions.
High-Speed Performance: The use of ceramic balls (typically Silicon Nitride) reduces centrifugal forces and friction, while the phenolic cage offers low weight and excellent high-speed stability, contributing to the high limiting speed.
Precision & Longevity: Manufactured to P4A super-precision standards with tight dimensional tolerances, this bearing ensures minimal runout and vibration. The pre-lubrication and open seal design are suited for systems with centralized lubrication, facilitating optimal performance within the specified temperature range.
71918 ACD/HCP4AQBCC Bearing Typical Application Areas
This high-precision, high-rigidity bearing set is ideally suited for advanced applications such as:
- High-frequency Machine Tool Spindles
- Precision Grinding Spindles
- High-speed Robotics and Automation Arms
- Aerospace Actuation Systems
- Medical and Dental Equipment Spindles
