71811 CD/HCP4
Hybrid Ceramic Super Precision Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
71811 CD/HCP4
Basic Information
System of measurement
Metric
Weight
0.073 kg
Tolerance class
P4 (ABEC-7)
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
55 mm
Bore diameter tolerance
-0.007mm to 0
Outside diameter
72 mm
Outside diameter tolerance
-0.007mm to 0
Width
9 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
4.762 mm
Ball quantity
29
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
2272 lbf
Radial static load rating
2430 lbf
Limiting speed
32 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:
$ 502.22
/ each
In Stock
- Fast delivery
- Free shipping on orders over $200
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
71811 CD/HCP4 Bearing Product Overview & Core Advantages
The 71811 CD/HCP4 is a single-row angular contact ball bearing engineered for applications demanding high precision and superior rotational accuracy. As a P4 (ABEC-7) tolerance class bearing, it is designed to handle combined loads, primarily thrust loads, with high reliability. Its compact design, featuring a 9mm width, makes it ideal for space-constrained, high-performance assemblies. The combination of a ceramic ball material and a phenolic cage contributes to its high-speed capabilities and reduced weight.
71811 CD/HCP4 Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71811 | Basic bearing series and size designation (55mm bore, 72mm OD). |
| C | Specifies a 15° contact angle, optimized for high-speed applications requiring high thrust load capacity. |
| D | Indicates the bearing is supplied with a preload for enhanced rigidity and precise shaft positioning. |
| HC | Signifies the use of Hybrid Ceramic balls (ceramic balls with steel rings), offering benefits like higher speed potential and longer service life. |
| P4 | Denotes the high-precision tolerance class (equivalent to ABEC-7), ensuring minimal runout and vibration for ultra-precise applications. |
71811 CD/HCP4 Bearing Structural Features & Performance Benefits
- High-Speed Performance: The phenolic resin cage and hybrid ceramic balls work in tandem to significantly reduce centrifugal forces and friction, enabling a high limiting speed of 32,000 rpm. This makes it a true high-speed bearing.
- High Rigidity & Precision: The application of a preload eliminates internal clearance, resulting in superior shaft rigidity and rotational accuracy, which is critical for machine tool spindles and other precision equipment.
- Optimized Load Capacity: The 15° contact angle is engineered to efficiently handle significant thrust loads in one direction, while also supporting moderate radial loads.
- Reduced Weight & Inertia: The combination of ceramic balls and a lightweight phenolic cage lowers the overall bearing weight (0.073 kg), reducing starting and driving torque for improved dynamic response.
- Wide Operating Range: The bearing is lubricated and operates effectively within a temperature range of -30°C to 110°C, ensuring reliability in various environments.
71811 CD/HCP4 Bearing Typical Application Areas
This bearing is specifically designed for high-performance machinery where speed, precision, and rigidity are paramount. Key application areas include:
- Machine Tool Spindles: High-speed machining centers, grinding spindles.
- Precision Instrumentation: Measuring devices, optical scanners.
- High-Speed Motors and Drives: Electric spindles, servo motors.
- Aerospace & Defense Systems: Gyroscopes, navigation equipment.
