7218 ACD/P4ATGB
7200 & 7300 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
7218 ACD/P4ATGB
Basic Information
System of measurement
Metric
Weight
6.8 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
90 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
160 mm
Outside diameter tolerance
-0.004mm to 0
Width
90 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
22.225 mm
Ball quantity
16
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
59625 lbf
Radial static load rating
72000 lbf
Limiting speed
17 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Universal Matchable (SU)
Number of bearings in matched set
3
Universal matching bearing
Universal Matchable (SU)
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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7218 ACD/P4ATGB Bearing Product Overview & Core Advantages
The 7218 ACD/P4ATGB is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional rotational accuracy and rigidity. Engineered to accommodate combined loads (radial and axial loads simultaneously), this bearing features a universal matchable (SU) design, allowing bearings to be mounted in pairs or sets for optimal performance. Its P4A tolerance class ensures ultra-precise dimensions and running accuracy, making it ideal for high-speed spindles and precision machinery where minimal runout and vibration are critical.
7218 ACD/P4ATGB Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| ACD | Contact Angle of 25° and High-Precision Design |
| P4A | High Tolerance Class for superior dimensional and running accuracy, exceeding ABEC 7/ISO P4 standards. |
| TGB | Indicates the specific preload level: Light (Class B). |
7218 ACD/P4ATGB Bearing Structural Features & Performance Benefits
- High Rigidity and Load Capacity: The 25° contact angle and robust construction enable the bearing to handle significant combined loads, providing stable and rigid support for spindles and shafts.
- Precision Performance: Manufactured to a P4A tolerance class, this bearing guarantees extremely tight dimensional control, leading to smooth operation, high rotational accuracy, and reduced vibration in high-speed applications.
- Optimized for Matched Sets: The Universal Matchable (SU) designation means individual bearings are manufactured to be paired in sets (commonly duplex or triplex arrangements) to achieve specific preload and stiffness characteristics without selective mounting.
- High-Speed Capability: The lightweight phenolic cage minimizes centrifugal forces, reduces friction, and contributes to a high limiting speed of 17,000 rpm, making it suitable for high-speed spindles.
- Durable Construction: Components made from chrome steel offer high hardness, wear resistance, and long service life under demanding operating conditions.
7218 ACD/P4ATGB Bearing Typical Application Areas
This precision angular contact ball bearing is ideally suited for high-performance machinery and systems, including:
- Machine Tool Spindles: CNC machining centers, grinding spindles, and milling spindles.
- High-Speed Motors and Spindles: Applications requiring high rotational speeds and accuracy.
- Precision Robotics: Critical joints and drive systems.
- Aerospace and Defense Systems: Gyroscopes, radar equipment, and other precision instruments.
- Medical Equipment: High-speed dental handpieces and imaging device rotors.
