71824 ACD/HCP4
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
71824 ACD/HCP4
Basic Information
System of measurement
Metric
Weight
0.49 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
150 mm
Outside diameter tolerance
-0.009mm to 0
Width
16 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
8.731 mm
Ball quantity
35
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
7020 lbf
Radial static load rating
9562 lbf
Limiting speed
13 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:
$ 1693.89
/ each
In Stock
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71824 ACD/HCP4 Bearing Product Overview & Core Advantages
The 71824 ACD/HCP4 is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional rotational accuracy and stiffness. Engineered with a 25° contact angle and P4 (ABEC-7) tolerance class, this bearing excels at accommodating combined loads—simultaneously handling significant radial and axial forces. Its ceramic ball construction and phenolic cage contribute to superior high-speed performance, with a limiting speed of 13,000 rpm, while the available preload ensures maximum system rigidity and positional accuracy in precision machinery.
71824 ACD/HCP4 Bearing Model Code Explained, Specifications & Naming Convention
The model number 71824 ACD/HCP4 is decoded as follows:
- 71824: Basic designation for a single-row, angular contact ball bearing with a 120mm bore and 150mm outside diameter.
- ACD: Designates a 25° contact angle and optimized internal geometry for high rigidity.
- H: Indicates the bearing is supplied with a preload for enhanced stiffness and reduced runout.
- C: Signifies the use of ceramic (silicon nitride) balls for reduced weight, higher speed capability, and improved durability.
- P4: Denotes a super-precision tolerance class (equivalent to ABEC-7), ensuring extremely tight dimensional and running accuracy.
71824 ACD/HCP4 Bearing Structural Features & Performance Benefits
- High Rigidity & Precision: The 25° contact angle and applied preload provide exceptional stiffness, minimizing deflection under load and maintaining precision in high-accuracy applications. The P4 tolerance guarantees consistent, high-performance operation.
- Superior High-Speed Capability: The combination of lightweight ceramic balls and a phenolic resin cage reduces centrifugal forces and friction, enabling stable operation at the high limiting speed of 13,000 rpm.
- Enhanced Load Capacity: The optimized internal design provides a high radial dynamic load rating of 7020 lbf and a radial static load rating of 9562 lbf, making it suitable for applications with significant combined loads.
- Optimal Material Selection: The chrome steel rings offer high strength and wear resistance, while the ceramic balls provide electrical insulation, reduced thermal expansion, and longer service life in challenging environments.
71824 ACD/HCP4 Bearing Typical Application Areas
This bearing is ideally suited for high-performance applications where precision, speed, and rigidity are critical. Key sectors include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Robotics: Arm joints and rotary units requiring high accuracy and stiffness.
- High-Frequency Motors & Spindles: Applications in PCB drilling, dental handpieces, and small tool spindles.
- Aerospace & Defense Systems: Gyroscopes, radar platforms, and other precision instrumentation.
