71901 ACE/HCP4A
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
71901 ACE/HCP4A
Basic Information
System of measurement
Metric
Weight
0.009 kg
Tolerance class
P4 (ABEC-7)
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
12 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
24 mm
Outside diameter tolerance
-0.005mm to 0
Width
6 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
3.175 mm
Ball quantity
12
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
457 lbf
Radial static load rating
191 lbf
Limiting speed
150 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:
$ 103.32
/ each
In Stock
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71901 ACE/HCP4A Bearing Product Overview & Core Advantages
The 71901 ACE/HCP4A is a single-row angular contact ball bearing engineered for applications demanding ultra-high precision and exceptional speed performance. Positioned in the P4 (ABEC-7) tolerance class, it is designed to handle significant axial loads in one direction and is available with preload for enhanced system rigidity. Its compact design, featuring a 12 mm bore and 6 mm width, makes it ideal for space-constrained, high-performance assemblies. The combination of a ceramic ball material and phenolic cage contributes to its high-speed capabilities and reduced rotational mass.
71901 ACE/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71901 | Basic bearing series and size designation (12mm bore, 24mm OD). |
| ACE | Signifies a 25° contact angle and specific internal design optimized for high-speed operation. |
| HCP4A | Indicates the bearing is supplied with preload and conforms to the P4 (ABEC-7) tolerance class, ensuring extremely tight dimensional and running accuracy. |
71901 ACE/HCP4A Bearing Structural Features & Performance Benefits
- High-Speed & Low Friction: The use of ceramic balls significantly reduces centrifugal forces and friction, enabling a high limiting speed of 150,000 rpm. The lightweight phenolic resin cage further enhances high-speed stability and performance.
- High Rigidity & Precision: The 25° contact angle and availability of preload provide high axial rigidity, minimizing deflection under load for superior positional accuracy.
- Optimized Load Capacity: As an angular contact bearing, it is designed to support combined radial and axial loads simultaneously, with a dynamic load rating of 457 lbf.
- Pre-Lubricated for Immediate Use: The bearing is factory-lubricated, ensuring optimal performance from the first rotation and simplifying installation.
71901 ACE/HCP4A Bearing Typical Application Areas
This precision bearing is ideally suited for:
- High-Speed Spindles in CNC machining centers and PCB drilling machines
- Precision Rotary Systems in semiconductor manufacturing equipment
- High-Frequency Motors and turbo-molecular pumps
- Medical Device Drives and dental handpieces
- Aerospace Instrumentation and gyroscopes
