71956 CD/HCP4A
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
71956 CD/HCP4A
Basic Information
System of measurement
Metric
Weight
11.1 kg
Tolerance class
P4 (ABEC-7)
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
280 mm
Bore diameter tolerance
-0.013mm to 0
Outside diameter
380 mm
Outside diameter tolerance
-0.015mm to 0
Width
46 mm
Width tolerance
-0.24mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
30.162 mm
Ball quantity
31
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
65475 lbf
Radial static load rating
102375 lbf
Limiting speed
5.6 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:
$ 8152.29
/ each
In Stock
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71956 CD/HCP4A Bearing Product Overview & Core Advantages
The 71956 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 designed to accommodate high combined loads, primarily thrust loads in one direction, and is supplied with a preload for enhanced system stiffness and precise shaft positioning. Its construction with ceramic balls and a phenolic cage enables superior high-speed performance and reduced rotational inertia, making it an ideal solution for high-reliability, precision machinery.
71956 CD/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71956 | Basic bearing designation, indicating the size series and bore diameter. |
| CD | Indicates a specific contact angle of 15° and a specific internal design optimized for high rigidity. |
| HC | Signifies the use of Hybrid Ceramic balls (silicon nitride), offering advantages in speed, temperature resistance, and lifespan. |
| P4 | Denotes a high-precision tolerance class (equivalent to ABEC-7), ensuring minimal runout and vibration for ultra-precise applications. |
71956 CD/HCP4A Bearing Structural Features & Performance Benefits
- High Rigidity and Preload: The bearing is supplied with a preload, which eliminates internal clearance. This significantly increases system stiffness, improves rotational accuracy, and dampens vibrations, which is critical for machining and positioning accuracy.
- Superior High-Speed Capability: The combination of ceramic balls (lighter than steel, reducing centrifugal forces) and a lightweight, robust phenolic resin cage allows for a very high limiting speed of 5,600 rpm. This design also reduces friction and heat generation.
- High Load Capacity: With a 15° contact angle and optimized raceway geometry, this bearing is exceptionally capable of handling high thrust loads in one direction while also supporting significant radial loads.
- Extended Service Life and Reliability: Hybrid ceramic construction provides inherent resistance to wear, and the phenolic cage is well-suited for high-speed operation. The bearing is pre-lubricated for immediate operation within its specified temperature range of -30°C to 110°C.
71956 CD/HCP4A Bearing Typical Application Areas
This precision angular contact ball bearing is ideally suited for high-performance applications, including:
- Machine Tool Spindles: For high-speed milling, grinding, and turning centers where precision, rigidity, and speed are paramount.
- High-Frequency Motors and Spindles: Used in applications requiring rapid acceleration and deceleration.
- Precision Robotics: In robot arm joints and gears requiring high positional accuracy and dynamic response.
- Aerospace and Defense Systems: In gyroscopes, radar systems, and other critical rotating assemblies.
