71924 ACE/HCP4A
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
71924 ACE/HCP4A
Basic Information
System of measurement
Metric
Weight
0.93 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
14.288 mm
Ball quantity
24
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
10102 lbf
Radial static load rating
8550 lbf
Limiting speed
17.5 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 ACE/HCP4A Bearing Product Overview & Core Advantages
The 71924 ACE/HCP4A is a high-precision angular contact ball bearing engineered for demanding applications requiring exceptional rotational accuracy and high-speed performance. As a single-row bearing, it is designed to accommodate primarily axial loads in one direction and combined loads. Its key advantages stem from its P4 (ABEC-7) tolerance class for superior running accuracy, a ceramic ball and phenolic cage combination for reduced weight and high-speed capability, and the availability of preload for enhanced system rigidity. This configuration makes it ideal for high-reliability, high-speed spindles and precision machinery.
71924 ACE/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Model Segment | Technical Meaning |
|---|---|
| 71924 | Standard bearing series designation, indicating the bearing dimensions (120mm bore, 165mm OD, 22mm width). |
| ACE | Internal design suffix. The 25° contact angle is optimized for high axial load capacity and high-speed operation. |
| HC | Indicates the use of Hybrid Ceramic balls (Silicon Nitride), which reduce friction, heat generation, and allow for higher limiting speeds. |
| P4 | Specifies the tolerance class equivalent to ABEC-7, ensuring extremely tight dimensional and running accuracy for precision applications. |
71924 ACE/HCP4A Bearing Structural Features & Performance Benefits
- Hybrid Ceramic Construction: The combination of steel rings and ceramic balls significantly reduces centrifugal forces, lowers operating temperature, and extends bearing life, especially at the high limiting speed of 17,500 rpm.
- Phenolic Resin Cage: This lightweight, high-strength cage material offers excellent dimensional stability and low friction, contributing to smooth operation and superior high-speed performance.
- 25° Contact Angle & Preload: The optimized contact angle provides excellent axial load capacity. The availability of preload eliminates internal clearance, resulting in greater system rigidity, improved shaft positioning accuracy, and reduced noise and vibration.
- Precision Engineering: Manufactured to P4 tolerance class, this bearing guarantees minimal runout and consistent performance, which is critical for applications requiring high rotational accuracy.
71924 ACE/HCP4A Bearing Typical Application Areas
This high-performance angular contact ball bearing is ideally suited for:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: Applications in PCB drilling, semiconductor manufacturing, and other high-accuracy processes.
- High-Speed Motors: Where low friction, high rigidity, and thermal stability are required.
- Aerospace & Defense Systems: Gyroscopes, radar systems, and other critical rotating assemblies.
