71810 CDGA/HCP4
Hybrid Ceramic Super Precision Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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Product Overview and Core Advantages
The 71810 CDGA/HCP4 is a single-row angular contact ball bearing designed for applications demanding ultra-high precision and exceptional speed performance. As a P4 tolerance class bearing, it guarantees minimal dimensional runout and superior rotational accuracy. Its 15° contact angle is optimized to handle significant axial loads in one direction while supporting radial loads, making it ideal for high-speed spindles and precision machinery. The combination of a ceramic ball material and a phenolic cage contributes to lower friction, reduced weight, and the capability to operate at the specified limiting speed of 46,000 rpm. This bearing is universally matchable (SU), allowing for precise preload control when mounted in sets, which is critical for achieving maximum system rigidity and performance.
71810 CDGA/HCP4 Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Significance |
|---|---|---|
| 71810 | Basic bearing series and size designation. | Indicates a metric, 50mm bore, 65mm OD, 7mm width bearing. |
| C | 15° nominal contact angle. | Optimized for high-speed applications with combined loads. |
| DG | Universal Matchable (SU) bearing designation. | Can be mounted in sets (back-to-back, face-to-face, or tandem) without selective fitting to achieve defined preload. |
| A | Extra light preload class. | Minimizes friction and heat generation, ideal for achieving the highest possible limiting speed. |
| HCP4 | Tolerance class P4. | Denotes a high-precision bearing with extremely tight tolerances on bore, outside diameter, and width for superior running accuracy. |
Structural Features and Performance Benefits
- High-Speed Capability: The phenolic resin cage offers excellent strength-to-weight ratio and operates smoothly at high speeds. Combined with the low-density ceramic balls (Silicon Nitride), which reduce centrifugal forces, this bearing achieves an exceptional limiting speed of 46,000 rpm.
- Precision and Rigidity: Manufactured to P4 tolerance class, this bearing ensures minimal runout and vibration. The 15° contact angle provides a robust design for applications requiring high rigidity under combined radial and axial loads.
- Universal Matching (SU): This feature allows multiple bearings to be mounted in any arrangement (DB, DF, DT) without the need for selective assembly. This simplifies installation and guarantees consistent, predictable preload and system performance.
- Open Design & Pre-lubrication: The open seal type minimizes friction for maximum speed, and the bearing comes pre-lubricated for immediate operation within its specified temperature range of -30°C to 110°C.
71810 CDGA/HCP4 Bearing Typical Application Areas
The 71810 CDGA/HCP4 is engineered for the most demanding high-precision and high-speed rotational systems. Its primary applications include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling and routing machines.
- High-Frequency Motors: Spindles for CNC machinery and robotics.
- Aerospace Gyroscopes and Instrumentation: Where extreme accuracy and reliability are paramount.
