S7020 ACD/P4ADBC
Sealed Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
S7020 ACD/P4ADBC
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
25 °
Ball & Washer Dimensions
Ball diameter
15.875 mm
Ball quantity
22
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
28575 lbf
Radial static load rating
36000 lbf
Limiting speed
16.25 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
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
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S7020 ACD/P4ADBC Bearing Product Overview & Core Advantages
The S7020 ACD/P4ADBC is a precision duplex back-to-back angular contact ball bearing designed for applications requiring exceptional rotational accuracy and rigidity. This matched pair bearing set is pre-loaded to Moderate (Class C) specifications, delivering high system stiffness and precise shaft positioning. Its primary advantage lies in its ability to simultaneously support combined loads (radial and axial) from both directions, making it an ideal solution for high-precision, high-reliability machinery where minimal deflection is critical.
S7020 ACD/P4ADBC Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning | Advantage |
|---|---|---|
| ACD | Angular Contact, Duplex arrangement | Indicates a pre-configured, pre-loaded pair of bearings for immediate installation and optimal performance. |
| P4A | High Precision Tolerance Class | Ensures extremely tight dimensional and running accuracy, superior for high-speed and precision applications. |
| DB | Back-to-Back Mounting | Provides high moment rigidity and excellent stability under complex load conditions. |
| Sealed | Integrated Seals | Contaminant exclusion and grease retention for long service life and reduced maintenance. |
S7020 ACD/P4ADBC Bearing Structural Features & Performance Benefits
- High Rigidity & System Stiffness: The duplex back-to-back (DB) arrangement and Moderate preload (Class C) create a highly rigid bearing system that effectively resists operational deflection and moment loads, ensuring precise shaft control.
- Superior Load Capacity: With a 25° contact angle and a dynamic load rating of 28,575 lbf, this bearing is engineered to handle significant combined radial and axial loads from both directions simultaneously.
- Optimized High-Speed Performance: The phenolic cage is lightweight and robust, contributing to lower centrifugal forces and smooth operation at the limiting speed of 16,250 rpm. The standard grease lubrication is suitable for this high-speed range.
- Precision & Longevity: Manufactured to P4A tolerance class with tight bore and OD tolerances, it guarantees exceptional running accuracy. The sealed design and pre-lubrication offer a maintenance-free solution within the specified temperature range of -30°C to 110°C.
S7020 ACD/P4ADBC Bearing Typical Application Areas
This bearing is specifically designed for demanding applications where precision, speed, and rigidity are paramount. Key industries and machinery include:
- Machine Tool Spindles: For high-speed milling, grinding, and turning centers.
- Precision Gearboxes: Especially in high-performance automotive and industrial transmissions.
- High-Frequency Motors and Spindles: Where minimal runout and high rotational accuracy are required.
- Industrial Pumps and Compressors: For handling axial and radial loads in demanding fluid handling systems.
