7020 CD/P4ADBA
7000 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
7020 CD/P4ADBA
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 Back-to-Back (DB)
Number of bearings in matched set
2
Universal matching bearing
No (Standard)
Preload
Extra light / Class A
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Phenolic
Technical Drawings
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In Stock
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7020 CD/P4ADBA Bearing Product Overview & Core Advantages
The 7020 CD/P4ADBA is a precision duplex angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. This P4A tolerance class bearing features a back-to-back (DB) matched arrangement, providing superior stability and the ability to withstand combined radial and axial loads from both directions. Its extra light preload (Class A) ensures minimal deflection under high-speed operation, making it ideal for high-precision spindles and other critical machinery components requiring high rigidity and precise running accuracy.
7020 CD/P4ADBA Bearing Model Code Explained, Specifications & Naming Convention
The model number 7020 CD/P4ADBA is decoded as follows:
- 7020: Basic bearing series, indicating a 100 mm bore and 150 mm outside diameter.
- C: Represents a 15° contact angle, optimized for high-speed applications with significant axial loads.
- D: Indicates the bearing is part of a duplex pair (two bearings supplied as a set).
- P4A: Denotes an ultra-precision tolerance class exceeding ABEC 7/ISO P4 standards, ensuring extremely tight dimensional and running accuracy.
- DB: Specifies the back-to-back mounting arrangement of the duplex pair, which increases moment rigidity and provides a widely spaced load zone.
- A: Signifies an extra light preload applied to the matched set, minimizing friction and heat generation at high speeds.
7020 CD/P4ADBA Bearing Structural Features & Performance Benefits
- High Rigidity & Stability: The duplex back-to-back (DB) design creates a rigid bearing system that effectively resists moment loads and shaft deflection, crucial for maintaining precision in machine tool spindles.
- Superior Load Capacity: Engineered to handle combined radial and axial loads simultaneously. The specific 15° contact angle is optimized for applications where high-speed performance is required alongside substantial axial load capacity.
- Precision High-Speed Operation: The combination of a phenolic resin cage, P4A precision tolerances, and extra light preload enables smooth operation at high rotational speeds (limiting speed of 20,000 rpm) with minimal vibration and heat buildup.
- Premium Material Construction: Manufactured from chrome steel for both rings and balls, providing high hardness, wear resistance, and long service life under demanding conditions.
7020 CD/P4ADBA Bearing Typical Application Areas
This bearing is specifically engineered for high-performance applications, including:
- Machine Tool Spindles (e.g., milling, grinding, and turning centers)
- High-Frequency Machining Spindles
- Precision Grinding Equipment
- High-Speed Pumps and Compressors
- Industrial Robotics and Automation
