71828 CDGA/HCP4
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
71828 CDGA/HCP4
Basic Information
System of measurement
Metric
Weight
0.71 kg
Tolerance class
P4
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
140 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
175 mm
Outside diameter tolerance
-0.004mm to 0
Width
18 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
10.319 mm
Ball quantity
35
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
10102 lbf
Radial static load rating
13950 lbf
Limiting speed
11 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Single
Number of bearings in matched set
2
Universal matching bearing
Universal Matchable (SU)
Preload
Extra light / Class A
Materials
Ring material
Chrome Steel
Ball material
Ceramic
Cage material
Phenolic
Technical Drawings
No drawings available at the moment, will be launched soon
In Stock
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71828 CDGA/HCP4 Bearing Product Overview & Core Advantages
The 71828 CDGA/HCP4 is a single-row angular contact ball bearing engineered for ultra-high precision applications requiring exceptional speed and rigidity. Manufactured to P4 tolerance class, this bearing delivers superior running accuracy. Its core advantage lies in its ability to accommodate high combined loads (radial and axial) simultaneously, thanks to its 15° contact angle. The use of ceramic balls and a phenolic cage enables superior high-speed performance and reduced rotational mass. This bearing is universally matchable (SU), allowing for precise preload control when mounted in pairs, making it an ideal solution for demanding, high-rigidity spindle systems.
71828 CDGA/HCP4 Bearing Model Code Explained, Specifications & Naming Convention
| Model Segment | Code | Technical Interpretation |
|---|---|---|
| Basic Designation | 71828 | Denotes a single-row angular contact ball bearing with a 140mm bore and specific cross-section. |
| Preload / Clearance | C | Indicates a specific internal clearance or preload level. |
| Tolerance Class | P4 | Signifies a high-precision tolerance class for exceptional dimensional and running accuracy. |
| Universal Matching | SU | Identifies the bearing as Universal Matchable, allowing any two bearings to be paired for precise preload arrangement. |
71828 CDGA/HCP4 Bearing Structural Features & Performance Benefits
- High-Speed Capability: The combination of lightweight ceramic balls and a phenolic resin cage significantly reduces centrifugal forces and inertial mass, enabling stable operation at the high limiting speed of 11,000 rpm.
- Superior Rigidity and Load Capacity: The 15° contact angle is optimized to handle significant combined radial and axial loads. The high-grade chrome steel rings provide the structural integrity needed for high-rigidity applications.
- Ultra-Precision Performance: Manufactured to P4 tolerance class with tight dimensional controls on the bore diameter, outside diameter, and width, this bearing ensures minimal runout and vibration for superior positional accuracy.
- Optimized for Matched Sets: The Universal Matchable (SU) designation means bearings can be selectively paired without special coding, simplifying inventory and assembly for duplex arrangements (e.g., DB, DF) to achieve exact preload and maximum system stiffness.
71828 CDGA/HCP4 Bearing Typical Application Areas
This high-precision angular contact bearing is specifically designed for advanced machinery where speed, accuracy, and rigidity are paramount. Key applications include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling and routing spindles.
- High-Frequency Motors: Spindles for electric motors operating at very high RPM.
- Aerospace & Defense Systems: Gyroscopes, radar systems, and other precision instrumentation.
