7020 CD/P4ADT
7000 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
7020 CD/P4ADT
Basic Information
System of measurement
Metric
Weight
2.53 kg
Tolerance class
P4A
Seal type
Open
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
20 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Duplex Tandem (DT)
Number of bearings in matched set
2
Universal matching bearing
No (Standard)
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
In Stock
Price available upon request.
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7020 CD/P4ADT Bearing Product Overview & Core Advantages
The 7020 CD/P4ADT is a precision angular contact ball bearing designed for demanding applications requiring exceptional rotational accuracy and rigidity. This duplex tandem (DT) arrangement consists of two matched bearings preloaded against each other, delivering superior axial stiffness and the ability to withstand heavy combined loads. Manufactured to the exacting P4A tolerance class, it is the ideal solution for high-precision, high-speed spindles and other critical machinery where uncompromising performance is essential.
7020 CD/P4ADT Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7020 | Basic bearing series, indicating a 100 mm bore, 150 mm OD, and 48 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 duplex pair. |
| P4A | Denotes an ultra-high precision tolerance class with enhanced running accuracy. |
| DT | Signifies the Duplex Tandem mounting arrangement, where two bearings are matched to share axial loads in the same direction. |
7020 CD/P4ADT Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The duplex tandem design creates a highly rigid assembly capable of supporting significant combined radial and axial loads in one direction, making it ideal for preloaded spindle systems.
- Precision & High-Speed Performance: The 15° contact angle and P4A tolerance class ensure minimal runout and smooth operation at high rotational speeds, with a limiting speed of 20,000 rpm. The lightweight phenolic cage contributes to lower inertia and higher acceleration capability.
- Optimized Internal Geometry: With 22 precision balls of 15.875 mm diameter, the bearing is engineered for optimal stress distribution and long service life under heavy dynamic loads (30,375 lbf dynamic rating).
- Premium Materials: Constructed from chrome steel for both rings and balls, providing high hardness, wear resistance, and dimensional stability across the operating temperature range of -30°C to 110°C.
7020 CD/P4ADT Bearing Typical Application Areas
This bearing is specifically engineered for high-performance applications, including:
- Machine Tool Spindles: CNC machining centers, grinding spindles, and milling heads.
- High-Speed Precision Equipment: PCB drilling machines, precision grinders.
- Industrial Pumps & Compressors: High-speed multi-stage pumps and compressors.
