7220 CD/P4AQFCD
7200 & 7300 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
7220 CD/P4AQFCD
Basic Information
System of measurement
Metric
Weight
13 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
136 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
25.4 mm
Ball quantity
15
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
92250 lbf
Radial static load rating
121500 lbf
Limiting speed
16 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Quadruplex Face-to-Face (QFC)
Number of bearings in matched set
4
Universal matching bearing
No (Standard)
Preload
Heavy / Class D
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Phenolic
Technical Drawings
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In Stock
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7220 CD/P4AQFCD Bearing Product Overview & Core Advantages
The 7220 CD/P4AQFCD is a precision quadruplex matched angular contact ball bearing designed for applications demanding exceptional rigidity and load capacity. This metric system bearing features a heavy preload (Class D) and is supplied as a lubricated, face-to-face matched set of four bearings. Its primary advantage lies in its ability to handle combined loads—significant radial and thrust loads simultaneously—making it ideal for high-precision, high-stiffness machinery where minimal deflection under load is critical. The P4A tolerance class ensures superior running accuracy for demanding applications.
7220 CD/P4AQFCD Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7220 | Basic bearing designation: 70mm Bore, 180mm OD, 34mm Width (single bearing). |
| CD | Contact angle of 15°. |
| P4A | High precision tolerance class, exceeding ABEC 7/ISO P4 standards. |
| QFC | Quadruplex Face-to-Face matched arrangement. A set of four bearings is supplied as a pre-matched unit. |
7220 CD/P4AQFCD Bearing Structural Features & Performance Benefits
- Extreme Rigidity & Load Capacity: The quadruplex face-to-face (QFC) arrangement and heavy preload (Class D) create an exceptionally rigid bearing system capable of withstanding high combined loads and moments, minimizing shaft deflection under operational stresses.
- High-Precision Performance: Manufactured to a P4A tolerance class, this bearing guarantees superior running accuracy, low noise, and low vibration levels, which is essential for precision spindles.
- Optimized Internal Geometry: The 15° contact angle provides an excellent balance between radial and axial load capacity. The phenolic cage offers high strength with low weight, contributing to smooth operation at the specified limiting speed.
- Robust Construction: Components made from chrome steel ensure high durability and long service life under demanding conditions.
7220 CD/P4AQFCD Bearing Typical Application Areas
This bearing is engineered for the most demanding industrial applications, including:
- High-Precision Machine Tool Spindles (e.g., grinding, milling, and turning centers)
- High-Rigidity Industrial Pumps and Compressors
- Precision Gearboxes and transmission systems
- Other machinery requiring a preloaded, multi-bearing arrangement for maximum stiffness and accuracy.
