7220 ACD/P4ATBTB
7200 & 7300 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
7220 ACD/P4ATBTB
Basic Information
System of measurement
Metric
Weight
9.73 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
180 mm
Outside diameter tolerance
-0.004mm to 0
Width
102 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
25.4 mm
Ball quantity
15
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
71775 lbf
Radial static load rating
87750 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
Light / Class B
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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7220 ACD/P4ATBTB Bearing Product Overview & Core Advantages
The 7220 ACD/P4ATBTB is a precision angular contact ball bearing configured as a triplex back-to-back (TBT) matched set. Engineered for applications demanding exceptional rotational accuracy and rigidity, this bearing set is designed to handle combined radial and axial loads simultaneously. Manufactured to the stringent P4A tolerance class, it offers superior running accuracy and dimensional stability. The light preload (Class B) minimizes deflection under operational loads, making it an ideal solution for high-precision, high-rigidity spindles and other critical machinery components.
7220 ACD/P4ATBTB Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| ACD | Angular Contact Design with a 25° contact angle for optimal axial load capacity. |
| P4A | Indicates a high-precision tolerance class with tight dimensional and running accuracy specifications. |
| TBT | Specifies a Triplex Back-to-Back arrangement of three matched bearings, providing maximum rigidity and moment load capacity. |
7220 ACD/P4ATBTB Bearing Structural Features & Performance Benefits
- High Rigidity & Stability: The triplex back-to-back (TBT) arrangement creates a highly rigid bearing system that effectively resists moment loads and shaft deflection, ensuring precise positioning and smooth operation.
- Superior Load Capacity: The 25° contact angle and robust construction enable the bearing to carry significant combined radial and axial loads.
- Precision Performance: Manufactured to P4A tolerance class with a light preload, this bearing set guarantees low noise, minimal vibration, and high running accuracy for demanding applications.
- Optimized for High-Speed Operation: The phenolic cage offers low weight and excellent high-speed performance, contributing to a limiting speed of 16,000 rpm.
- Durable Construction: Components made from chrome steel provide high hardness, wear resistance, and a long operational lifespan.
7220 ACD/P4ATBTB Bearing Typical Application Areas
This precision triplex bearing set is ideally suited for high-performance machinery requiring extreme accuracy and rigidity, including:
- Machine Tool Spindles (e.g., CNC milling, grinding, and turning centers)
- High-Frequency Machining Centers
- Precision Grinding Spindles
- Industrial High-Speed Motors
- Other critical applications in the aerospace and precision engineering sectors.
