71944 ACD/HCP4A
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
71944 ACD/HCP4A
Basic Information
System of measurement
Metric
Weight
5.56 kg
Tolerance class
P4 (ABEC-7)
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
220 mm
Bore diameter tolerance
-0.012mm to 0
Outside diameter
300 mm
Outside diameter tolerance
-0.013mm to 0
Width
38 mm
Width tolerance
-0.24mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
25.4 mm
Ball quantity
29
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
46800 lbf
Radial static load rating
64125 lbf
Limiting speed
6.7 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:
$ 5360.14
/ each
In Stock
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71944 ACD/HCP4A Bearing Product Overview & Core Advantages
The 71944 ACD/HCP4A is a single-row angular contact ball bearing engineered for high-precision applications requiring exceptional rotational accuracy and rigidity. This P4 (ABEC-7) tolerance class bearing is designed to handle significant combined loads, accommodating high radial loads and thrust loads in one direction simultaneously. Its optimized 25° contact angle provides superior axial load capacity and stiffness. The combination of a ceramic ball material and phenolic cage enables outstanding high-speed performance and thermal stability, making it ideal for demanding machine tool and precision equipment applications.
71944 ACD/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71944 | Basic bearing series and size designation |
| ACD | 25° contact angle design optimized for high axial rigidity |
| HCP4A | P4 tolerance class with enhanced dimensional and running accuracy |
71944 ACD/HCP4A Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The optimized 25° contact angle and precision geometry provide excellent resistance to deflection under combined radial and axial loads, with dynamic load rating of 46,800 lbf and static load rating of 64,125 lbf.
- Superior High-Speed Performance: The ceramic balls reduce centrifugal forces and friction, while the phenolic cage offers excellent strength-to-weight ratio, enabling operation at limiting speeds up to 6,700 rpm.
- Precision Engineering: Manufactured to P4 (ABEC-7) tolerance class with tight dimensional controls (bore tolerance: -0.012mm to 0) for applications requiring minimal runout and vibration.
- Thermal Stability: The phenolic cage and ceramic ball combination maintains dimensional stability across the operating temperature range of -30° to 110°C.
- Preload Availability: Designed to accommodate preload for enhanced system stiffness and precise rotational accuracy in demanding applications.
71944 ACD/HCP4A Bearing Typical Application Areas
- Machine Tool Spindles: High-speed machining centers, grinding spindles, and precision boring machines
- Precision Instrumentation: Measuring equipment, optical instruments, and laboratory apparatus
- High-Speed Motors: Spindle motors, high-frequency motors, and precision drive systems
- Aerospace Components: Gyroscopes, navigation systems, and aircraft instrumentation
- Medical Equipment: Dental handpieces, surgical tools, and diagnostic imaging systems
