71811 CDGA/HCP4
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
71811 CDGA/HCP4
Basic Information
System of measurement
Metric
Weight
0.073 kg
Tolerance class
P4
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
55 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
72 mm
Outside diameter tolerance
-0.004mm 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°C to 110 °C
Radial dynamic load rating
2272 lbf
Radial static load rating
2430 lbf
Limiting speed
34 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Single
Number of bearings in matched set
3
Universal matching bearing
Universal Matchable (SU)
Preload
Extra light / Class A
Materials
Ring material
Chrome Steel
Ball material
Ceramic
Cage material
Phenolic
Technical Drawings
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In Stock
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71811 CDGA/HCP4 Bearing Product Overview & Core Advantages
The 71811 CDGA/HCP4 is a single-row angular contact ball bearing engineered for ultra-high precision applications. Positioned in the P4 tolerance class, it delivers exceptional rotational accuracy and dimensional stability. Its core advantage lies in its ability to support high-speed operation (up to 34,000 rpm) while accommodating significant combined loads, thanks to its 15° contact angle. The combination of a ceramic ball and phenolic cage minimizes friction and heat generation, making it ideal for demanding, high-reliability scenarios where precision and speed are critical.
71811 CDGA/HCP4 Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| CDGA | Indicates a Universal Matchable (SU) bearing designed for preload: Extra light (Class A). This suffix denotes a specific internal design and preload level that allows the bearing to be universally matched with other identical bearings in any combination to achieve a specific preload or rigidity. |
| HCP4 | The P4 suffix specifies the tolerance class, indicating very high precision with tight dimensional and running accuracy tolerances. The "HC" prefix is associated with the bearing's internal design and material specification, including the hybrid ceramic balls. |
71811 CDGA/HCP4 Bearing Structural Features & Performance Benefits
- Hybrid Ceramic Construction: The use of ceramic balls with a steel ring significantly reduces centrifugal forces, lowers operating temperature, and provides superior resistance to wear and electrical arcing, enabling higher limiting speeds and longer service life.
- High-Speed Phenolic Cage: The phenolic resin cage offers excellent dimensional stability at high speeds with low friction, contributing to the bearing's exceptional high-speed performance and smooth operation.
- Precision & Rigidity: Manufactured to P4 tolerance class with a 15° contact angle, this bearing provides high running accuracy and rigidity, making it capable of handling combined radial and axial loads effectively.
- Universal Matching Capability: The Universal Matchable (SU) design allows for flexible mounting arrangements. Bearings can be paired in various combinations (e.g., back-to-back, face-to-face, or tandem) to optimize system performance for specific load capacity and rigidity requirements.
71811 CDGA/HCP4 Bearing Typical Application Areas
This high-precision, high-speed angular contact bearing is ideally suited for advanced applications, including:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Robotics: High-accuracy joints and arm assemblies.
- High-Frequency Spindles: PCB drilling and routing machines.
- Medical Equipment: Dental handpieces and high-speed centrifuges.
- Aerospace Instrumentation: Gyroscopes and navigation systems.
