7021 CDGB/P4A
7000 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
7021 CDGB/P4A
Basic Information
System of measurement
Metric
Weight
1.59 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
105 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
160 mm
Outside diameter tolerance
-0.004mm to 0
Width
26 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
17.462 mm
Ball quantity
21
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
21510 lbf
Radial static load rating
21712 lbf
Limiting speed
16 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
Chrome Steel
Cage material
Phenolic
Technical Drawings
No drawings available at the moment, will be launched soon
In Stock
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7021 CDGB/P4A Bearing Product Overview & Core Advantages
The 7021 CDGB/P4A is a single row angular contact ball bearing designed for exceptional precision and performance in demanding applications. Manufactured to P4A tolerance class, this bearing offers superior running accuracy. Its key advantage lies in its ability to accommodate high combined loads, efficiently handling both radial and substantial axial loads in one direction. The Universal Matchable (SU) design allows for flexible mounting in sets of three to achieve optimal preload and system rigidity, making it an ideal choice for high-precision and high-speed machinery requiring uncompromising reliability.
7021 CDGB/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7021 | Basic bearing designation indicating a 105 mm bore and 160 mm outside diameter. |
| C | Specifies a 15° contact angle, optimized for high axial load capacity. |
| DGB | Indicates a Light preload (Class B) and that the bearing is part of a Universal Matchable (SU) set. |
| P4A | Denotes a high-precision tolerance class with enhanced dimensional and running accuracy. |
7021 CDGB/P4A Bearing Structural Features & Performance Benefits
- High Precision & Rigidity: Manufactured to P4A tolerance standards with tight dimensional control (bore/OD tolerance: -0.004mm to 0), ensuring superior running accuracy and system stability under load.
- Optimized Load Capacity: The 15° contact angle and robust construction using chrome steel rings and balls provide excellent performance under combined radial and axial loads.
- High-Speed Capability: The lightweight phenolic resin cage minimizes centrifugal forces, contributing to a high limiting speed of 16,000 rpm. The bearing is supplied lubricated for immediate operation.
- Universal Matching Design: As a Universal Matchable (SU) bearing, it can be mounted in a pre-arranged set of three to achieve a defined Light preload (Class B), simplifying installation and ensuring consistent, high-performance operation.
7021 CDGB/P4A Bearing Typical Application Areas
This precision bearing is ideally suited for applications requiring high speed, accuracy, and rigidity, including:
- Machine Tool Spindles
- High-Frequency Motors
- Precision Grinding Spindles
- Industrial Pumps and Compressors
- Aerospace Control Systems
