S7021 ACD/P4A
Sealed Super Precision Angular Contact Ball Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
S7021 ACD/P4A
Basic Information
System of measurement
Metric
Weight
1.61 kg
Tolerance class
P4 (ABEC-7)
Seal type
Sealed
For load direction
Angular Contact
Main Dimensions
Bore diameter
105 mm
Bore diameter tolerance
-0.008mm to 0
Outside diameter
160 mm
Outside diameter tolerance
-0.01mm to 0
Width
26 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
17.462 mm
Ball quantity
21
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
20340 lbf
Radial static load rating
20925 lbf
Limiting speed
7.5 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Single
Preload
Available
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:
$ 1529.55
/ each
In Stock
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S7021 ACD/P4A Bearing Product Overview & Core Advantages
The S7021 ACD/P4A is a precision angular contact ball bearing designed for applications demanding exceptional accuracy and rigidity. Operating under the P4 (ABEC-7) tolerance class, it delivers superior running precision. Its key advantage lies in its ability to accommodate combined loads—simultaneously handling significant radial and axial loads in one direction. The bearing is preloaded and comes lubricated and sealed for immediate installation and long-term, maintenance-free operation, making it ideal for high-speed spindles and other high-performance machinery.
S7021 ACD/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Suffix | Technical Meaning |
|---|---|
| ACD | Indicates a 25° contact angle and that the bearing is supplied with a specific preload. This optimizes the bearing for high rigidity and precise rotational accuracy. |
| P4A | Denotes the tolerance class P4 (ABEC-7), ensuring very tight dimensional and running accuracy for demanding applications. |
S7021 ACD/P4A Bearing Structural Features & Performance Benefits
- High Rigidity & Precision: The 25° contact angle and applied preload work in tandem to provide exceptional system stiffness, minimizing deflection under load and ensuring outstanding running accuracy.
- Superior Load Capacity: Engineered as a single-row angular contact bearing, it is optimized to support high combined radial and axial loads efficiently.
- High-Speed Capability: The lightweight and robust phenolic resin cage ensures stable operation and guides the balls effectively, contributing to the high limiting speed of 7,500 rpm.
- Ready-to-Install & Long-Lasting: Being factory-sealed and lubricated, the bearing is protected from contamination and is prepped for immediate use, offering a long service life with minimal maintenance.
S7021 ACD/P4A Bearing Typical Application Areas
This bearing is ideally suited for high-performance applications where precision and speed are critical. Key sectors include:
- Machine Tool Spindles (e.g., for milling, grinding)
- High-Frequency Motors
- Precision Gearboxes
- Industrial Pumps and Compressors
- Medical and Laboratory Equipment
