7021 CD/P4ADGC
7000 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
7021 CD/P4ADGC
Basic Information
System of measurement
Metric
Weight
3.18 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
52 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
35100 lbf
Radial static load rating
43425 lbf
Limiting speed
16 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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7021 CD/P4ADGC Bearing Product Overview & Core Advantages
The 7021 CD/P4ADGC is a precision angular contact ball bearing designed for demanding applications requiring exceptional rotational accuracy and rigidity. As a universal matchable (SU) bearing supplied in a pre-set pair, it delivers outstanding performance under combined radial and axial loads. Manufactured to P4A tolerance class and featuring a moderate preload (Class C), this bearing is engineered for high-speed operation, superior running accuracy, and long-term reliability in precision machinery.
7021 CD/P4ADGC Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7021 | Basic bearing series, indicating a 105 mm bore, 160 mm OD, and 52 mm width. |
| CD | Universal matchable bearing pair with a 15° contact angle, supplied as a set of two bearings. |
| P4A | High precision tolerance class for superior dimensional and running accuracy. |
| DGC | Indicates the specific internal design, preload level (Moderate / Class C), and cage configuration. |
7021 CD/P4ADGC Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The angular contact design with a 15° contact angle and universal matching (SU) arrangement enables the bearing pair to withstand significant combined radial and axial loads from both directions, providing exceptional system stiffness.
- Precision & High-Speed Performance: Manufactured to P4A tolerance standards with a phenolic cage, this bearing ensures low vibration, minimal heat generation, and stable operation at high speeds, with a limiting speed of 16,000 rpm.
- Optimized Internal Geometry: The design utilizes 21 high-precision chrome steel balls for smooth operation and high dynamic load capacity (35,100 lbf).
- Pre-lubricated & Ready for Use: The bearing comes lubricated from the factory, simplifying installation and ensuring immediate operational readiness.
7021 CD/P4ADGC 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
- Robotic Arm Joints and Precision Gearboxes
