7021 CD/P4ADGA
7000 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
7021 CD/P4ADGA
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
Extra light / Class A
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Phenolic
Technical Drawings
No drawings available at the moment, will be launched soon
Price:
$ 710.42
/ each
In Stock
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7021 CD/P4ADGA Bearing Product Overview & Core Advantages
The 7021 CD/P4ADGA is a precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. Manufactured to P4A tolerance class, this bearing is characterized by its ability to accommodate combined loads—simultaneously handling significant radial loads and axial loads in one direction. Its Extra light (Class A) preload ensures minimal deflection and smooth, precise operation, making it ideal for high-speed, high-reliability machinery. The universal matchable (SU) design allows for flexible mounting arrangements in pairs to support bidirectional axial loads.
7021 CD/P4ADGA 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 | Contact angle of 15° and specific internal design for optimized load distribution. |
| P4A | Indicates a high-precision tolerance class with enhanced running accuracy and dimensional stability. |
| DGA | Universal Matchable (SU) designation, signifying the bearing is supplied lubricated and ready for pairing in a back-to-back (DB) or face-to-face (DF) arrangement. |
7021 CD/P4ADGA Bearing Structural Features & Performance Benefits
- High Rigidity & Precision: The angular contact design and Class A preload provide superior system stiffness, minimizing axial and radial play under operational loads. This is critical for maintaining positional accuracy in precision equipment.
- Superior Load Capacity: With a dynamic load rating of 35,100 lbf and a static load rating of 43,425 lbf, this bearing is engineered to handle demanding combined radial and axial loads.
- Optimized High-Speed Performance: The lightweight phenolic cage reduces centrifugal forces, contributing to a high limiting speed of 16,000 rpm. The standard lubrication ensures consistent performance across the operating temperature range of -30°C to 110°C.
- Universal Matching Capability: As a Universal Matchable (SU) bearing, two 7021 CD/P4ADGA bearings can be directly paired without selective mounting, simplifying installation and ensuring optimal preload and performance in duplex sets.
7021 CD/P4ADGA Bearing Typical Application Areas
This high-precision angular contact ball bearing is ideally suited for:
- Machine Tool Spindles: For high-speed milling, grinding, and turning centers requiring extreme accuracy and rigidity.
- Precision Gearboxes and Pumps: Where reliable operation under combined loads is essential.
- High-Frequency Motors and Spindles: Benefiting from the high limiting speed and stable operation.
- Medical and Laboratory Equipment: For applications demanding quiet, precise, and reliable rotational motion.
