7220 ACD/P4ADBA
7200 & 7300 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
7220 ACD/P4ADBA
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
25 °
Ball & Washer Dimensions
Ball diameter
25.4 mm
Ball quantity
15
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
54450 lbf
Radial static load rating
58500 lbf
Limiting speed
16 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Duplex Back-to-Back (DB)
Number of bearings in matched set
2
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
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7220 ACD/P4ADBA Bearing Product Overview & Core Advantages
The 7220 ACD/P4ADBA is a precision duplex angular contact ball bearing configured in a back-to-back (DB) arrangement. Engineered to the exacting P4A tolerance class, this bearing is designed for applications demanding exceptional rotational accuracy and system rigidity. Its core advantage lies in its ability to support combined loads—significant radial and bidirectional axial loads simultaneously—making it an ideal solution for high-precision, high-speed machinery where positioning accuracy is critical.
7220 ACD/P4ADBA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7220 | Basic bearing designation indicating a 100 mm bore, 180 mm OD. |
| AC | Angular Contact design with a 25° contact angle. |
| D | Duplex (two single bearings supplied as a matched set). |
| DB | Back-to-Back mounting arrangement. |
| P4A | High precision tolerance class (superior to ABEC 7), ensuring minimal runout and vibration. |
7220 ACD/P4ADBA Bearing Structural Features & Performance Benefits
- High Rigidity & Stability: The back-to-back duplex arrangement creates a wide, rigid support base, effectively resisting overturning moments and maintaining shaft alignment under complex loads. This is enhanced by the Extra Light (Class A) preload, which minimizes axial and radial play for superior positional accuracy.
- Superior Load Capacity: The 25° contact angle and optimized internal geometry enable high radial dynamic load rating of 54,450 lbf and excellent capacity for thrust loads in both directions.
- Optimized High-Speed Performance: The lightweight phenolic resin cage reduces centrifugal forces, while the open design and factory-applied lubrication allow for efficient operation at high limiting speeds up to 16,000 rpm.
- Precision Materials: Manufactured from high-grade chrome steel for rings and balls, ensuring high durability, wear resistance, and consistent performance within a temperature range of -30°C to 110°C.
7220 ACD/P4ADBA Bearing Typical Application Areas
This bearing is specifically engineered for high-performance applications, including:
- Machine Tool Spindles: For CNC milling centers, grinding spindles, and lathes requiring high speed, rigidity, and precision.
- High-Frequency Motors & Spindles: Used in applications where rapid acceleration and deceleration are common.
- Precision Gearboxes & Pumps: Where accurate shaft positioning and load handling are critical.
- Industrial Robotics: In arm joints and rotary units demanding high moment stiffness and accuracy.
