S7020 ACDGA/P4A
Sealed Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
S7020 ACDGA/P4A
Basic Information
System of measurement
Metric
Weight
1.27 kg
Tolerance class
P4A
Seal type
Sealed
For load direction
Angular Contact
Main Dimensions
Bore diameter
100 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
150 mm
Outside diameter tolerance
-0.004mm to 0
Width
24 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
15.875 mm
Ball quantity
22
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
17842 lbf
Radial static load rating
18000 lbf
Limiting speed
16.25 X 1000 rpm
Lubrication
Grease
Matched arrangement
Single
Number of bearings in matched set
3
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
In Stock
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S7020 ACDGA/P4A Bearing Product Overview & Core Advantages
The S7020 ACDGA/P4A is a high-precision, single-row angular contact ball bearing engineered for applications demanding exceptional accuracy and rigidity. Its defining feature is the 25° contact angle and P4A super-precision tolerance class, making it ideally suited for high-speed spindles and other precision machinery. This bearing is designed to accommodate combined loads, primarily handling substantial axial loads in one direction while supporting radial loads. The phenolic resin cage and universal matchable (SU) design contribute to its superior high-speed performance and versatility in complex mounting arrangements.
S7020 ACDGA/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning | Significance & Advantage |
|---|---|---|
| AC | Angular Contact | Designed for combined radial and axial loads. |
| DGA | Duplex Ground, Face-to-Face arrangement (Universal Match) | The bearing faces are ground to allow for universal matching (SU) in face-to-face, back-to-back, or tandem arrangements to achieve specific preload and rigidity. |
| P4A | Tolerance Class | Denotes super-precision running accuracy, tighter than ABEC 7/P4. Ensures minimal runout and vibration for ultra-high-speed and high-accuracy applications. |
S7020 ACDGA/P4A Bearing Structural Features & Performance Benefits
- High Rigidity and Precision: Manufactured to P4A tolerance class with extremely tight dimensional tolerances on the bore, outside diameter, and width. This ensures precise shaft positioning and minimal deflection under load, which is critical for machine tool spindles.
- Superior High-Speed Capability: The lightweight phenolic resin cage reduces centrifugal forces, while the optimized internal geometry and 25° contact angle work in concert to achieve a high limiting speed of 16,250 rpm.
- Optimized Load Capacity: The angular contact design is engineered to handle significant one-direction axial loads and radial loads simultaneously. With a dynamic load rating of 17,842 lbf and a static load rating of 18,000 lbf, it offers reliable performance under demanding conditions.
- Universal Matching (SU): As a universal matchable bearing, the S7020 ACDGA/P4A can be paired with another identical bearing in various preloaded configurations (face-to-face, back-to-back, or tandem) without selective mounting, simplifying installation and optimizing system performance.
S7020 ACDGA/P4A Bearing Typical Application Areas
This bearing's combination of high speed, precision, and rigidity makes it a preferred choice in demanding sectors:
- High-Frequency Machine Tool Spindles: For CNC machining centers, grinding spindles, and milling spindles.
- Precision Robotics: In high-accuracy robotic arms and joints.
- Aerospace & Defense Systems: In gyroscopes, radar equipment, and other critical navigation systems.
- High-Speed Motors and Turbines: Where minimal vibration and high rotational accuracy are paramount.
