71828 CD/P4DGC
71800 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71828 CD/P4DGC
Basic Information
System of measurement
Metric
Weight
1.6 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
36 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
16380 lbf
Radial static load rating
28125 lbf
Limiting speed
11 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Universal Matchable (SU)
Number of bearings in matched set
2
Universal matching bearing
Universal Matchable (SU)
Preload
Moderate / Class C
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Phenolic
Technical Drawings
No drawings available at the moment, will be launched soon
In Stock
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71828 CD/P4DGC Bearing Product Overview & Core Advantages
The 71828 CD/P4DGC is a precision angular contact ball bearing designed for demanding applications requiring high rotational accuracy and rigidity. Operating under a P4 tolerance class, it delivers exceptional running precision. This bearing features a universal matchable (SU) design, allowing two bearings to be mounted in a versatile arrangement to support combined loads effectively. Preloaded to a Moderate / Class C level, it ensures optimal stiffness and minimizes axial and radial play, making it ideal for high-speed spindles and other precision machinery.
71828 CD/P4DGC Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| CD | Indicates a universal matchable bearing designed with a specific contact angle and internal geometry for optimized pairing. |
| P4 | Denotes a high-precision tolerance class with extremely tight dimensional and running accuracy tolerances. |
| DGC | Signifies the bearing is supplied with a moderate preload (Class C) and is lubricated from the factory. |
71828 CD/P4DGC Bearing Structural Features & Performance Benefits
- High Rigidity and Precision: The 15° contact angle and moderate preload provide superior system stiffness and precise rotational characteristics, essential for applications like machine tool spindles.
- Optimized Load Capacity: Engineered to support significant combined radial and axial loads simultaneously, with a dynamic load rating of 16,380 lbf and a static load rating of 28,125 lbf.
- High-Speed Capability: The lightweight phenolic cage and optimized internal design contribute to a high limiting speed of 11,000 rpm, reducing centrifugal forces and friction.
- Precision Materials: Constructed from chrome steel for both rings and balls, ensuring high durability, wear resistance, and consistent performance under the specified temperature range of -30°C to 110°C.
71828 CD/P4DGC Bearing Typical Application Areas
This bearing is specifically suited for high-performance applications, including:
- Machine Tool Spindles
- High-Speed Machining Centers
- Precision Grinding Spindles
- High-Frequency Motors
- Other precision rotary equipment requiring high rigidity and exceptional running accuracy.
