S7020 CD/P4ADBB
Sealed Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
S7020 CD/P4ADBB
Basic Information
System of measurement
Metric
Weight
2.55 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
48 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
15.875 mm
Ball quantity
22
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
30375 lbf
Radial static load rating
38250 lbf
Limiting speed
10 X 1000 rpm
Lubrication
Grease
Matched arrangement
Duplex Back-to-Back (DB)
Number of bearings in matched set
2
Universal matching bearing
No (Standard)
Preload
Light / Class B
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Phenolic
Technical Drawings
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In Stock
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S7020 CD/P4ADBB Bearing Product Overview & Core Advantages
The S7020 CD/P4ADBB is a precision duplex angular contact ball bearing designed for applications demanding exceptional rigidity and running accuracy. This metric system bearing features a back-to-back (DB) matched arrangement and a Light preload (Class B), making it ideal for managing combined loads—simultaneously supporting substantial radial and bidirectional axial forces. Its compact design, superior material composition, and P4A tolerance class ensure high reliability and performance in the most demanding high-speed and high-precision environments.
S7020 CD/P4ADBB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| S7020 | Basic bearing designation, indicating a 100 mm bore, 150 mm OD, and 48 mm width. |
| C | 15° contact angle, optimized for handling axial loads. |
| D | Indicates a duplex (two-bearing) set. |
| P4A | Specifies a high-precision tolerance class, exceeding standard ABEC-7 (P4) and including additional running accuracy requirements. |
| DB | Denotes the Back-to-Back arrangement, which provides high moment rigidity and stability. |
| Sealed / Grease | The bearing is sealed and comes pre-lubricated with grease, offering protection from contamination and extended service life. |
S7020 CD/P4ADBB Bearing Structural Features & Performance Benefits
- High Rigidity & Stability: The duplex back-to-back (DB) arrangement creates a wide, rigid support system that effectively resists moment loads and shaft deflection, ensuring exceptional operational stability.
- Superior Load Capacity: With a 15° contact angle and a dynamic load rating of 30,375 lbf, this bearing is engineered to handle significant combined radial and axial loads in both directions.
- Optimized High-Speed Performance: The lightweight phenolic resin cage minimizes centrifugal forces, while the precision-ground chrome steel components and optimized internal geometry contribute to a high limiting speed of 10,000 rpm.
- Precision & Longevity: Manufactured to P4A tolerance class, it guarantees low vibration and noise. The integral seals retain the factory-applied grease, protecting against contaminants and providing a long, maintenance-free service life within a temperature range of -30°C to 110°C.
S7020 CD/P4ADBB Bearing Typical Application Areas
This high-performance duplex angular contact ball bearing is ideally suited for critical applications requiring high precision, speed, and rigidity, including:
- Machine Tool Spindles for milling, grinding, and turning centers
- High-frequency Spindles in PCB drilling and routing machines
- Precision Industrial Pumps and Compressors
- Robotic Arm Joints and Precision Gearboxes
- Advanced Medical and Laboratory Equipment
