71964 ACDMA/HCP4A
Hybrid Ceramic Super Precision Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
71964 ACDMA/HCP4A
Basic Information
System of measurement
Metric
Weight
20.5 kg
Tolerance class
P4 (ABEC-7)
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
320 mm
Bore diameter tolerance
-0.016mm to 0
Outside diameter
440 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
27
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
78975 lbf
Radial static load rating
131625 lbf
Limiting speed
4.3 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:
$ 10781.16
/ each
In Stock
- Fast delivery
- Free shipping on orders over $200
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
71964 ACDMA/HCP4A Bearing Product Overview & Core Advantages
The 71964 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, ceramic ball material, and availability with preload. Its core advantage lies in its ability to handle high-speed operations and combined loads with superior rigidity and reliability, making it an ideal choice for high-end machinery where precision is paramount.
71964 ACDMA/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| AC | Angular Contact design with a 25° contact angle for optimal axial load capacity. |
| DMA | Designates specific internal geometry, likely optimized for high-speed and high-rigidity performance. |
| HCP4A | Indicates a P4 tolerance class and a phenolic (P) cage. The "A" suffix typically signifies a specific internal design or preload level. |
71964 ACDMA/HCP4A Bearing Structural Features & Performance Benefits
- High Rigidity & Precision: The combination of a 25° contact angle and P4 precision ensures minimal deflection and high system rigidity under load, crucial for maintaining accuracy.
- Superior High-Speed Performance: The lightweight phenolic resin cage and low-density ceramic balls significantly reduce centrifugal forces, enabling a high limiting speed of 4,300 rpm.
- Enhanced Load Capacity: With a radial dynamic load rating of 78,975 lbf and a static load rating of 131,625 lbf, this bearing is built to withstand significant combined loads.
- Optimized for Performance: The open seal type allows for custom lubrication schemes, while the preload availability minimizes axial and radial play, enhancing positional accuracy.
71964 ACDMA/HCP4A Bearing Typical Application Areas
This precision angular contact ball bearing is ideally suited for high-performance applications, including:
- Machine Tool Spindles
- High-Speed Machining Centers
- Precision Grinding Spindles
- Aerospace & Defense Systems
- High-Frequency Motors and Spindles
