71960 CDMA/HCP4A
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
71960 CDMA/HCP4A
Basic Information
System of measurement
Metric
Weight
19.4 kg
Tolerance class
P4 (ABEC-7)
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
300 mm
Bore diameter tolerance
-0.013mm to 0
Outside diameter
420 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
26
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
83475 lbf
Radial static load rating
135000 lbf
Limiting speed
5 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:
$ 9375.48
/ each
In Stock
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71960 CDMA/HCP4A Bearing Product Overview & Core Advantages
The 71960 CDMA/HCP4A is a high-precision angular contact ball bearing engineered for demanding applications requiring exceptional rotational accuracy and rigidity. Its design is optimized to accommodate combined loads, simultaneously handling significant radial loads and thrust loads in one direction. Key advantages include its P4 (ABEC-7) tolerance class for superior running accuracy, a phenolic resin cage for high-speed capability, and ceramic balls that reduce weight and centrifugal forces, enabling higher limiting speeds and extended service life. This bearing is preloaded, ensuring high system stiffness and precise shaft positioning.
71960 CDMA/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| 71960 | Basic bearing series and size code (300mm bore, 420mm OD). |
| CD | A matched arrangement designation indicating a duplex pair of bearings in a back-to-back (DB) configuration, providing high moment rigidity. |
| MA | Specifies a light preload applied to the matched set, ensuring optimal stiffness and minimal axial play. |
| HCP4A | Defines the tolerance class and material. "HC" indicates a hybrid ceramic construction (steel rings with ceramic balls), "P4" is the P4 precision grade (ABEC-7), and "A" signifies a 15° contact angle. |
71960 CDMA/HCP4A Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The duplex back-to-back (DB) arrangement creates a wide effective spread, significantly increasing the bearing's ability to withstand moment loads and combined radial and axial loads.
- Superior High-Speed Performance: The combination of a lightweight phenolic cage and ceramic (silicon nitride) balls reduces centrifugal forces and friction, allowing for a high limiting speed of 5,000 rpm. The 15° contact angle is optimized for high-speed operation with a thrust component.
- Enhanced Durability and Precision: Manufactured to a P4 tolerance class, this bearing ensures minimal runout and vibration. The hybrid ceramic design offers improved wear resistance and operates effectively within a broad temperature range from -30°C to 110°C.
- Preload for Optimal Performance: The bearing set is supplied with a factory-applied light preload (MA), eliminating internal clearance and providing immediate high stiffness and rotational accuracy upon installation.
71960 CDMA/HCP4A Bearing Typical Application Areas
This high-performance precision bearing is ideally suited for applications where high speed, rigidity, and accuracy are paramount. Key industries and machinery include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling and routing machines.
- High-Frequency Motors and Turbomachinery
- Medical and Laboratory Equipment: Centrifuges and imaging devices.
