S7021 CD/P4ADGC
Sealed Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
S7021 CD/P4ADGC
Basic Information
System of measurement
Metric
Weight
3.22 kg
Tolerance class
P4A
Seal type
Sealed
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
10 X 1000 rpm
Lubrication
Grease
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
Price available upon request.
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S7021 CD/P4ADGC Bearing Product Overview & Core Advantages
The S7021 CD/P4ADGC is a precision double row angular contact ball bearing designed for applications requiring exceptional rotational accuracy and rigidity. This high-speed bearing features a universal matchable (SU) design, allowing two bearings to be paired in any combination to achieve the desired preload. Its primary advantage lies in its ability to support combined loads—significant radial and bidirectional axial loads simultaneously—making it ideal for high-precision, high-reliability machinery where compact design and superior performance are critical.
S7021 CD/P4ADGC Bearing Model Code Explained, Specifications & Naming Convention
The S7021 CD/P4ADGC model number provides detailed technical specifications:
- S70: Denotes a high-precision angular contact ball bearing series.
- 21: Indicates the bore diameter code (105 mm).
- CD: Specifies a 15° contact angle and a specific internal design optimized for universal matching (SU).
- P4A: Identifies the tolerance class, signifying very high dimensional and running accuracy exceeding ABEC 7/ISO P4.
- DGC: Indicates the use of a phenolic (polyamide) cage, which contributes to lower friction, lower weight, and superior performance in high-speed applications.
S7021 CD/P4ADGC Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The double row design provides a rigid support system, effectively handling combined radial and axial loads from both directions. The 15° contact angle is optimized for high axial load capacity while maintaining excellent radial load performance.
- High-Speed Performance: The lightweight and robust phenolic cage (DGC) ensures stable operation and reduced centrifugal forces, enabling a high limiting speed. The P4A precision grade minimizes vibration and heat generation at high RPMs.
- Precision & Durability: Manufactured to P4A tolerance class, this bearing ensures minimal runout and consistent performance. Components made from chrome steel offer high fatigue resistance and long service life.
- Universal Matchability (SU): This feature allows for simplified bearing arrangement and preload setting, providing design flexibility and reducing inventory complexity.
S7021 CD/P4ADGC Bearing Typical Application Areas
This bearing is engineered for demanding applications in:
- Machine Tool Spindles
- High-Frequency Motors
- Precision Grinding Spindles
- Industrial Pumps and Compressors
- Medical and Laboratory Equipment
