71936 CD/HCP4A
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
71936 CD/HCP4A
Basic Information
System of measurement
Metric
Weight
3.48 kg
Tolerance class
P4 (ABEC-7)
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
180 mm
Bore diameter tolerance
-0.01mm to 0
Outside diameter
250 mm
Outside diameter tolerance
-0.011mm to 0
Width
33 mm
Width tolerance
-0.24mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
22.225 mm
Ball quantity
27
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
37800 lbf
Radial static load rating
47700 lbf
Limiting speed
9.5 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:
$ 3524.56
/ each
In Stock
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Product Overview and Core Advantages
The 71936 CD/HCP4A is a high-precision angular contact ball bearing engineered for demanding applications requiring exceptional rotational accuracy and rigidity. This single-row bearing is distinguished by its 15° contact angle and is supplied with a preload, making it ideal for setups where minimal axial and radial deflection under load is critical. Its construction with a phenolic cage and ceramic balls enables superior high-speed performance and reduced rotating mass. The bearing is pre-lubricated and operates effectively within a wide temperature range, offering a reliable, long-service-life solution for precision machinery.
71936 CD/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
The model number 71936 CD/HCP4A provides specific technical details:
- 71936: Basic designation indicating a metric, light series angular contact ball bearing with a 180mm bore and 250mm outside diameter.
- CD: Signifies a duplex arrangement with a specific preload level (not explicitly "matched" in the spec, but a standard duplex pairing designation).
- HCP4A: A composite suffix.
- HC: Denotes the use of Hybrid Ceramic balls (Silicon Nitride).
- P4: Specifies a high-precision tolerance class (equivalent to ABEC-7), ensuring extremely tight dimensional and running accuracy.
- A: Indicates a 30° contact angle (Note: The provided specification lists 15°. The "A" suffix is a common industry designation for a 30° angle. Please verify the exact contact angle for your application).
Structural Features and Performance Benefits
- High Rigidity and Precision: Manufactured to a P4 (ABEC-7) tolerance class, this bearing ensures exceptional running accuracy and system stability, which is crucial for applications like machine tool spindles.
- Superior High-Speed Capability: The combination of a lightweight phenolic resin cage and low-density, hard ceramic (Si3N4) balls significantly reduces centrifugal forces, allowing for higher limiting speeds (9,500 rpm) and lower operating temperatures.
- Extended Service Life and Reliability: Ceramic balls are electrically resistant, harder, and smoother than steel, leading to dramatically reduced wear, longer lubricant life, and enhanced performance in challenging environments.
- Optimized Load Capacity: The angular contact design is optimized to support combined loads, carrying significant radial loads and thrust loads in one direction simultaneously.
71936 CD/HCP4A Bearing Typical Application Areas
This high-precision, high-speed bearing is ideally suited for:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Robotics: Arm joints and high-accuracy rotary axes.
- High-Frequency Motors and Spindles: Where maximum RPM and minimal vibration are required.
- Aerospace and Defense Systems: Gyroscopes, radar platforms, and other critical rotating assemblies.
- Medical and Laboratory Equipment: Centrifuges and advanced imaging devices.
