7210 CDGB/HCP4A
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
7210 CDGB/HCP4A
Basic Information
System of measurement
Metric
Weight
0.39 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
50 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
90 mm
Outside diameter tolerance
-0.004mm to 0
Width
20 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
12.7 mm
Ball quantity
15
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
10102 lbf
Radial static load rating
7650 lbf
Limiting speed
41 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Single
Number of bearings in matched set
3
Universal matching bearing
Universal Matchable (SU)
Preload
Light / Class B
Materials
Ring material
Chrome Steel
Ball material
Ceramic
Cage material
Phenolic
Technical Drawings
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In Stock
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7210 CDGB/HCP4A Bearing Product Overview & Core Advantages
The 7210 CDGB/HCP4A is a high-precision angular contact ball bearing engineered for applications demanding exceptional accuracy and reliability. As a universal matchable single bearing with a 15° contact angle and Light Preload (Class B), it is designed to accommodate combined loads—simultaneously handling significant radial loads and axial loads in one direction. Its construction with ceramic balls and a phenolic cage contributes to superior high-speed performance, low heat generation, and extended service life, making it an ideal choice for high-rigidity and precision spindle arrangements.
7210 CDGB/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| CD | Optimized 15° contact angle design for high-speed operation and universal matching capability. |
| GB | Indicates Light Preload (Class B), providing high running accuracy and system rigidity. |
| HC | Refers to the Hybrid Ceramic construction, featuring ceramic balls for enhanced speed and durability. |
| P4A | Denotes an ultra-high precision tolerance class for applications requiring extreme rotational accuracy. |
7210 CDGB/HCP4A Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The optimized internal geometry and 15° contact angle enable the bearing to support substantial combined radial and axial loads, providing stable and rigid support for precision shafts.
- Superior High-Speed Performance: The combination of ceramic balls (lower density, reduced centrifugal force) and a lightweight phenolic resin cage allows for a very high limiting speed of 41,000 rpm, minimizing friction and heat generation.
- Ultra-Precision Operation: Manufactured to P4A tolerance class and supplied with a light preload, this bearing ensures minimal runout and exceptional rotational accuracy, which is critical for high-speed spindles.
- Extended Service Life: The hybrid ceramic design offers increased resistance to wear and a longer operational life, especially in demanding, high-velocity applications.
7210 CDGB/HCP4A Bearing Typical Application Areas
This precision bearing is ideally suited for high-performance machinery and systems, including:
- Machine Tool Spindles (High-speed machining centers, grinding spindles)
- Precision Grinding Equipment
- High-Frequency Motors and Spindles
- Aerospace & Defense Instrumentation
- Medical Device Rotary Systems
