S7021 CD/P4ADGB
Sealed Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
S7021 CD/P4ADGB
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
Light / Class B
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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S7021 CD/P4ADGB Bearing Product Overview & Core Advantages
The S7021 CD/P4ADGB is a precision double row angular contact ball bearing designed for applications demanding high rigidity and exceptional running accuracy. Engineered to a P4A tolerance class, it excels in handling combined loads—simultaneous radial and bidirectional axial loads—with superior stability. Its compact double row design offers a high load density in a limited space, making it ideal for high-precision, high-reliability machinery. The bearing comes pre-lubricated and sealed, ensuring long-term performance and simplified maintenance.
S7021 CD/P4ADGB Bearing Model Code Explained, Specifications & Naming Convention
| Model Segment | Technical Meaning |
|---|---|
| S7021 | Basic bearing designation, indicating a 105 mm bore, 160 mm OD, and 52 mm width. |
| C | Specifies a 15° contact angle, optimized for high-speed operation and axial load capacity. |
| D | Indicates the bearing is part of a Universal Matchable (SU) pair. Two bearings are precision-matched as a set for optimal preload and performance. |
| P4A | Denotes an extremely high precision tolerance class, exceeding ABEC 7 standards, for applications requiring minimal runout and vibration. |
| DB | Specifies a back-to-back (DB) mounting arrangement for the matched pair, providing high moment rigidity. |
S7021 CD/P4ADGB Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The double row angular contact design and Universal Matchable (SU) pairing create an exceptionally rigid system capable of withstanding significant combined radial and axial loads from both directions.
- Precision & High-Speed Performance: Manufactured to P4A tolerances with a 15° contact angle and a lightweight phenolic resin cage, this bearing ensures smooth operation, low heat generation, and a high limiting speed of 10,000 rpm.
- Optimized for Longevity: The sealed construction retains the factory-applied grease lubrication, protecting against contamination and providing reliable operation across a wide temperature range (-30°C to 110°C).
- Preload & Stability: Supplied as a pre-matched set with a Light (Class B) preload, the bearing is ready for installation, eliminating complex adjustments and ensuring immediate, stable performance with minimal axial play.
S7021 CD/P4ADGB Bearing Typical Application Areas
This bearing is engineered for high-performance applications where precision, speed, and rigidity are paramount. Key industries and equipment include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Gearboxes: Robotics, aerospace, and automotive transmission systems.
- High-Frequency Motors and Spindles: For PCB drilling and CNC machining.
- Medical Equipment: High-speed centrifuges and imaging device rotors.
- Pumps and Compressors: Applications requiring precise shaft positioning and high axial stiffness.
