7220 CD/P4ADFB
7200 & 7300 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
7220 CD/P4ADFB
Basic Information
System of measurement
Metric
Weight
6.48 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
68 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
57375 lbf
Radial static load rating
60750 lbf
Limiting speed
16 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Duplex Face-to-Face (DF)
Number of bearings in matched set
2
Universal matching bearing
No (Standard)
Preload
Light / Class B
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/P4ADFB Bearing Product Overview & Core Advantages
The 7220 CD/P4ADFB is a precision duplex angular contact ball bearing designed for applications requiring exceptional rotational accuracy and rigidity. This matched bearing set in a Face-to-Face (DF) arrangement is engineered to handle combined radial and axial loads simultaneously. With its P4A tolerance class and light preload (Class B), it delivers superior running accuracy and stability, making it ideal for high-precision, high-rigidity spindles and other demanding machinery.
7220 CD/P4ADFB Bearing Model Code Explained, Specifications & Naming Convention
The model number 7220 CD/P4ADFB is decoded as follows:
- 7220: Basic series designation, indicating a 100 mm bore and 180 mm outside diameter.
- C: Denotes a 15° contact angle, optimized for high-speed operation and moderate axial load capacity.
- D: Indicates the bearing is part of a Duplex (matched pair) set.
- P4A: Specifies the ultra-precision tolerance class, exceeding ABEC 7 standards for exceptional dimensional and running accuracy.
- DF: Designates the Face-to-Face mounting arrangement, which provides good resistance to moment loads and misalignment.
- B: Indicates a Light preload (Class B), which increases system rigidity and minimizes axial and radial play.
7220 CD/P4ADFB Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The duplex face-to-face (DF) arrangement of two matched bearings creates a highly rigid bearing system capable of withstanding significant combined radial and axial loads and moment loads.
- Precision Performance: Manufactured to P4A tolerance class, this bearing ensures minimal runout and vibration, which is critical for maintaining precision in machining and positioning applications.
- Optimized High-Speed Capability: The 15° contact angle and phenolic resin cage contribute to lower friction and reduced centrifugal forces, enabling stable operation at high rotational speeds (limiting speed of 16,000 rpm).
- Superior Material Construction: Made from chrome steel for both rings and balls, the bearing offers high fatigue life and durability. The phenolic cage provides strength and smooth operation at high speeds.
- Preload & Stability: The application of a light preload (Class B) eliminates internal clearance, enhancing shaft positioning accuracy and overall system stiffness from startup.
7220 CD/P4ADFB Bearing Typical Application Areas
This high-precision duplex bearing is ideally suited for:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Gearboxes and High-Frequency Motor Spindles.
- Industrial Pumps and Compressors requiring high rigidity and accuracy.
- Robotic Arm Joints and Rotary Tables in automation systems.
- Medical Equipment and Analytical Instruments demanding precise rotational movement.
