7020 CD/P4ATBTA
7000 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
7020 CD/P4ATBTA
Basic Information
System of measurement
Metric
Weight
3.79 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
72 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
40050 lbf
Radial static load rating
57375 lbf
Limiting speed
20 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Triplex Back-to-Back (TBT)
Number of bearings in matched set
3
Universal matching bearing
No (Standard)
Preload
Extra light / Class A
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/P4ATBTA Bearing Product Overview & Core Advantages
The 7020 CD/P4ATBTA is a precision angular contact ball bearing supplied as a triplex back-to-back (TBT) matched set. Engineered to the exacting P4A tolerance class, this configuration delivers exceptional rotational accuracy, high system rigidity, and superior capacity for combined loads. The extra light preload (Class A) ensures smooth, quiet operation at high speeds while minimizing friction and heat generation, making it an ideal solution for demanding, high-precision applications.
7020 CD/P4ATBTA Bearing Model Code Explained, Specifications & Naming Convention
The model number 7020 CD/P4ATBTA provides detailed technical specifications:
- 7020: Standard bearing series designation, indicating a 100mm bore, 150mm OD.
- C: Denotes a 15° contact angle, optimized for high-speed performance and moderate axial load capacity.
- D: Indicates the bearing is supplied with an extra light preload (Class A).
- P4A: Specifies a super-precision tolerance class superior to ABEC 7, ensuring minimal runout and vibration.
- TB: Identifies a Back-to-Back mounting arrangement within the matched set.
- T: Specifies the use of a phenolic (polyamide) cage.
- A: Indicates the optimized internal geometry for superior high-speed performance.
7020 CD/P4ATBTA Bearing Structural Features & Performance Benefits
- High Rigidity & Stability: The triplex back-to-back (TBT) arrangement creates a statically indeterminate bearing system that provides maximum resistance to moment loads and exceptional operational stiffness, which is critical for maintaining precision under heavy cutting forces or complex loading conditions.
- Superior Load Capacity: The angular contact design enables the bearing to support significant combined (radial and axial) loads simultaneously. The matched set distributes loads evenly across all three bearings, enhancing overall system life and reliability.
- High-Speed Capability: The combination of the 15° contact angle, lightweight phenolic cage, and optimized internal geometry allows for a high limiting speed of 20,000 rpm, reducing centrifugal forces and stabilizing thermal growth.
- Precision Performance: Manufactured to P4A tolerance standards with tight dimensional control on bore, outside diameter, and width, this bearing ensures minimal runout for applications requiring extreme accuracy and smooth motion.
7020 CD/P4ATBTA Bearing Typical Application Areas
This high-precision, high-rigidity bearing set is specifically designed for advanced machinery, including:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Gearboxes and High-Frequency Motors.
- Aerospace Positioning Systems and Robotic Rotary Joints.
- Medical Imaging Equipment such as CT scanners.
- High-Performance Pumps and Compressors.
