71964 CDMA/HCP4A
Hybrid Ceramic Super Precision Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
71964 CDMA/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
15 °
Ball & Washer Dimensions
Ball diameter
38.1 mm
Ball quantity
27
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
84825 lbf
Radial static load rating
139500 lbf
Limiting speed
4.8 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:
$ 10781.95
/ each
In Stock
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71964 CDMA/HCP4A Bearing Product Overview & Core Advantages
The 71964 CDMA/HCP4A is a single-row angular contact ball bearing engineered for high-precision and high-speed applications. Its design is optimized to handle significant combined loads—simultaneously supporting substantial radial loads and axial loads in one direction. Featuring a P4 (ABEC-7) tolerance class and a 15° contact angle, this bearing delivers exceptional rotational accuracy and operational stability. The combination of a phenolic cage and ceramic balls contributes to its superior high-speed capability, reduced weight, and extended service life, making it an ideal choice for demanding, precision machinery.
Model Code Breakdown
| Suffix Code | Technical Meaning |
|---|---|
| CDMA | Indicates a specific internal design with a 15° contact angle and optimized internal geometry for high precision and high rigidity. |
| HCP4A | Denotes the P4 (ABEC-7) tolerance class for ultra-precision, and the preload level (A) applied for enhanced stiffness and reduced runout. |
71964 CDMA/HCP4A Bearing Structural Features & Performance Benefits
- High Rigidity and Precision: Manufactured to P4 tolerance class and supplied with a specific preload (A), this bearing ensures minimal deflection and high system rigidity, crucial for precision spindles.
- Superior High-Speed Performance: The lightweight phenolic resin cage and low-density ceramic (silicon nitride) balls significantly reduce centrifugal forces, enabling a high limiting speed of 4,800 rpm.
- Excellent Load Capacity: With a dynamic load rating of 84,825 lbf and a static load rating of 139,500 lbf, it reliably handles demanding combined radial and axial loads.
- Extended Service Life and Reliability: The ceramic ball material offers superior wear resistance, lower thermal expansion, and electrical insulation properties, contributing to longer bearing life in challenging environments.
71964 CDMA/HCP4A Bearing Typical Application Areas
This precision angular contact bearing is ideally suited for high-performance applications requiring speed, accuracy, and rigidity, including:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Grinding Spindles: Internal and external grinding machines.
- High-Frequency Motors and Spindles: Applications where electrical insulation is beneficial.
- Aerospace and Defense Systems: Gyroscopes, radar equipment, and other precision instruments.
