71924 CE/HCPA9ADGA
Hybrid Ceramic Super Precision Bearings
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71924 CE/HCPA9ADGA Bearing Product Overview & Core Advantages
The 71924 CE/HCPA9ADGA is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and performance. As part of the universal matchable (SU) series, this bearing is supplied in a pre-determined duplex set, enabling it to accommodate combined loads—significant radial loads and axial loads in both directions. Its extra light preload (Class A) ensures smooth, precise operation with minimal friction, making it ideal for high-speed spindles and other precision machinery where rigidity and running accuracy are paramount.
71924 CE/HCPA9ADGA Bearing Model Code Explained, Specifications & Naming Convention
- 71924: Basic model number indicating a metric angular contact ball bearing with 120mm bore, 165mm OD, and 44mm width
- CE: Designates ceramic ball material (Silicon Nitride), providing superior speed capability and reduced weight
- HC: Indicates phenolic cage material, offering excellent high-speed performance and reduced friction
- PA9A: Specifies the tolerance class PA9A, representing ultra-high precision with extremely tight dimensional and running accuracy tolerances
- DGA: Denotes universal matchable (SU) arrangement in a duplex set of two bearings
71924 CE/HCPA9ADGA Bearing Structural Features & Performance Benefits
The 71924 CE/HCPA9ADGA incorporates several advanced design features that deliver superior performance:
- Ceramic Ball Technology: Silicon Nitride balls significantly reduce centrifugal forces, enabling higher limiting speeds (10,000 rpm) while providing electrical insulation and corrosion resistance
- Phenolic Resin Cage: The HC cage ensures excellent dimensional stability at high speeds, reduced weight, and superior lubrication retention compared to metallic cages
- Ultra-Precision Manufacturing: PA9A tolerance class guarantees exceptional running accuracy with bore and outside diameter tolerances of -0.004mm to 0, and width tolerance of -0.2mm to 0
- 15° Contact Angle: Optimized for applications requiring high-speed operation while maintaining good axial load capacity in both directions
- Universal Matchability: The SU arrangement allows for flexible mounting configurations (DB, DF, DT) to suit specific application requirements
71924 CE/HCPA9ADGA Bearing Typical Application Areas
This high-precision angular contact bearing is specifically engineered for applications demanding the highest levels of accuracy and speed:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers requiring exceptional running accuracy
- Precision Medical Equipment: Dental handpieces, surgical tools, and diagnostic imaging systems
- Aerospace Systems: Gyroscopes, navigation equipment, and auxiliary power units
- Semiconductor Manufacturing: Wafer handling robots, precision positioning stages, and inspection equipment
- High-Speed Motors: Spindle motors, turbo-molecular pumps, and other high-RPM applications
