71972 ACDMA/HCP4A
Hybrid Ceramic Super Precision Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
71972 ACDMA/HCP4A
Basic Information
System of measurement
Metric
Weight
22.6 kg
Tolerance class
P4 (ABEC-7)
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
360 mm
Bore diameter tolerance
-0.016mm to 0
Outside diameter
480 mm
Outside diameter tolerance
-0.02mm to 0
Width
56 mm
Width tolerance
-0.3mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
38.1 mm
Ball quantity
30
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
83475 lbf
Radial static load rating
150750 lbf
Limiting speed
3.8 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:
$ 14258.09
/ each
In Stock
- Fast delivery
- Free shipping on orders over $200
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
71972 ACDMA/HCP4A Bearing Product Overview & Core Advantages
The 71972 ACDMA/HCP4A is a high-precision angular contact ball bearing engineered for demanding applications requiring exceptional accuracy and performance. This single-row bearing is distinguished by its P4 (ABEC-7) tolerance class, ensuring ultra-precise rotational characteristics. A key advantage is its ability to accommodate high combined loads, particularly substantial axial loads in one direction, facilitated by its 25° contact angle. The use of ceramic balls and a phenolic cage contributes to superior high-speed performance, reduced weight, and extended service life, making it an ideal choice for high-reliability, high-rigidity spindle systems.
71972 ACDMA/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71972 | Basic bearing series and size designation (360mm bore). |
| AC | Angular Contact design, optimized for combined loads. |
| DM | Duplex Matched bearing set (implied by preload availability). |
| A | Specific contact angle of 25°. |
| HCP4A | Indicates a P4 tolerance class and potentially specific internal running accuracy or preload specifications for high-precision applications. |
71972 ACDMA/HCP4A Bearing Structural Features & Performance Benefits
- High Rigidity and Load Capacity: The angular contact design with a 25° contact angle provides excellent resistance to combined radial and axial loads. The availability of preload further enhances system stiffness, critical for minimizing deflection under operational stresses.
- Superior High-Speed Performance: The combination of ceramic balls (lower density, reduced centrifugal force) and a lightweight phenolic resin cage allows for a high limiting speed of 3,800 rpm. This construction also reduces friction and heat generation.
- Precision Engineering: Manufactured to a P4 (ABEC-7) tolerance class, this bearing ensures minimal runout and vibration, which is paramount for achieving the highest levels of machining and operational accuracy.
- Optimized for Performance: The open seal type allows for customized lubrication schemes to maximize performance in specific high-speed or temperature conditions, while the specified temperature range of -30°C to 110°C ensures reliability across various operating environments.
71972 ACDMA/HCP4A Bearing Typical Application Areas
This precision bearing is ideally suited for high-performance machinery where speed, accuracy, and rigidity are non-negotiable. Key applications include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling machines and precision grinding equipment.
- High-Frequency Motors: Spindles for routers and other high-RPM applications.
- Aerospace & Defense Systems: Gyroscopes, radar systems, and other precision instrumentation.
