7020 ACD/P4ATBTC
7000 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
7020 ACD/P4ATBTC
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
25 °
Ball & Washer Dimensions
Ball diameter
15.875 mm
Ball quantity
22
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
38700 lbf
Radial static load rating
54000 lbf
Limiting speed
16 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
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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7020 ACD/P4ATBTC Bearing Product Overview & Core Advantages
The 7020 ACD/P4ATBTC is a precision angular contact ball bearing designed for demanding applications requiring exceptional rigidity and accuracy. This triplex back-to-back (TBT) matched set delivers superior performance under combined radial and axial loads. Manufactured to P4A tolerance class with a 25° contact angle and moderate preload (Class C), it ensures high running accuracy, excellent stability, and optimal stiffness in high-precision machinery. Its phenolic cage contributes to smooth operation at the specified limiting speed.
7020 ACD/P4ATBTC Bearing Model Code Explained, Specifications & Naming Convention
The model number 7020 ACD/P4ATBTC is decoded as follows:
- 7020: Basic bearing series, indicating a 100mm bore and 150mm outside diameter.
- AC: Angular Contact design.
- D: Signifies a duplex (two-bearing) set. In this context, it is part of a larger matched arrangement.
- P4A: Denotes a high-precision tolerance class exceeding ABEC 7 (P4) standards, with specific attention to runout and width tolerances.
- TBT: Indicates the bearing is supplied as part of a Triplex Back-to-Back matched set of three bearings.
- BTC: Specifies the preload level. C corresponds to a Moderate preload.
7020 ACD/P4ATBTC Bearing Structural Features & Performance Benefits
- High Rigidity & Stability: The triplex back-to-back arrangement creates an exceptionally rigid bearing system, capable of resisting complex moment loads and shaft deflection, which is critical for maintaining precision in machine tool spindles.
- Superior Load Capacity: The 25° contact angle is optimized to handle significant combined radial and axial loads simultaneously. The matched set distributes loads evenly across all three bearings, enhancing overall life and reliability.
- Precision Performance: Built to P4A tolerance class with strict dimensional and running accuracy, this bearing ensures minimal vibration and high positional accuracy for demanding applications.
- Optimized High-Speed Operation: The lightweight phenolic resin cage reduces centrifugal forces, minimizes friction, and allows for smooth operation up to the specified limiting speed of 16,000 rpm.
- Preload & Matching: The bearings are universally matched as a set and preloaded to Class C (Moderate) at the factory, eliminating internal clearance and ensuring immediate, precise performance upon installation without requiring user adjustment.
7020 ACD/P4ATBTC Bearing Typical Application Areas
This high-precision, high-rigidity bearing set is ideally suited for:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Gearboxes and High-Frequency Motors.
- Industrial Pumps and Compressors requiring high shaft stability.
- Aerospace & Defense positioning systems and auxiliary drives.
- Medical Equipment such as high-speed dental handpieces and imaging devices.
