71924 ACB/HCP4A
Hybrid Ceramic Super Precision Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
71924 ACB/HCP4A
Basic Information
System of measurement
Metric
Weight
1.2 kg
Tolerance class
P4 (ABEC-7)
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
120 mm
Bore diameter tolerance
-0.008mm to 0
Outside diameter
165 mm
Outside diameter tolerance
-0.01mm to 0
Width
22 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
8.731 mm
Ball quantity
41
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
5738 lbf
Radial static load rating
6412 lbf
Limiting speed
17 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Single
Preload
Available
Materials
Ring material
Chrome Steel
Ball material
Ceramic
Cage material
Phenolic
Technical Drawings
No drawings available at the moment, will be launched soon
Price:
$ 1649.09
/ each
In Stock
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71924 ACB/HCP4A Bearing Product Overview & Core Advantages
The 71924 ACB/HCP4A is a high-precision single-row angular contact ball bearing engineered for applications demanding exceptional accuracy and performance. Its defining characteristic is the 25° contact angle, optimized to support significant combined loads—handling both radial and substantial axial loads in one direction simultaneously. Manufactured to a P4 (ABEC-7) tolerance class, it guarantees ultra-precise running accuracy. The use of a phenolic resin cage and ceramic balls contributes to its high-speed capability, low friction, and extended service life, making it an ideal choice for high-reliability, high-rigidity spindles and precision machinery.
71924 ACB/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
The model number 71924 ACB/HCP4A can be broken down as follows to reveal its technical specifications:
- 71924: Basic bearing series and size designation (Bore: 120mm, OD: 165mm, Width: 22mm).
- ACB: Signifies Angular Contact Bearing with a 25° contact angle and a phenolic cage.
- HCP4A: This suffix combination indicates:
- HC: Denotes the use of Hybrid Ceramic balls (Silicon Nitride).
- P4: Specifies the tolerance class (equivalent to ABEC-7), ensuring extremely tight dimensional and running accuracy.
- A: Indicates a specific internal design and that the bearing is supplied preloaded for immediate high-stiffness performance.
71924 ACB/HCP4A Bearing Structural Features & Performance Benefits
- Hybrid Ceramic Construction: The combination of chrome steel rings and ceramic balls significantly reduces friction and heat generation, enabling higher limiting speeds. Ceramic balls are also lighter, electrically resistant, and offer superior performance in lubricant-starved conditions.
- High Rigidity & Preload: The bearing is supplied with a preload, eliminating internal clearance. This results in superior system rigidity, precise rotational accuracy, and reduced vibration, which is critical for machining finish and positioning accuracy.
- Optimized High-Speed Performance: The lightweight phenolic resin cage is exceptionally well-suited for high-speed operation, providing excellent strength and guidance with minimal centrifugal forces.
- Precision & Load Capacity: Built to P4 tolerance, it ensures smooth, quiet operation. With a dynamic load rating of 5738 lbf and a static load rating of 6412 lbf, it is robust enough for demanding applications involving combined loads.
71924 ACB/HCP4A Bearing Typical Application Areas
This bearing is specifically designed for high-performance applications, including:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling, engraving machines, and high-frequency motors.
- High-Speed Automation: Robotics, CNC rotary tables, and pick-and-place units.
- Aerospace & Medical Equipment: Applications requiring high reliability, speed, and precision.
