7218 ACD/P4A
7200 & 7300 Series Super Precision Angular Contact Ball Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
7218 ACD/P4A
Basic Information
System of measurement
Metric
Weight
2.27 kg
Tolerance class
P4 (ABEC-7)
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
90 mm
Bore diameter tolerance
-0.008mm to 0
Outside diameter
160 mm
Outside diameter tolerance
-0.01mm to 0
Width
30 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° to 110 °C
Radial dynamic load rating
27225 lbf
Radial static load rating
23850 lbf
Limiting speed
12 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Single
Preload
Available
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Phenolic
Technical Drawings
No drawings available at the moment, will be launched soon
Price:
$ 259.17
/ each
In Stock
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7218 ACD/P4A Bearing Product Overview & Core Advantages
The 7218 ACD/P4A is a high-precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. Engineered to simultaneously handle combined radial and axial loads, its single-row design with a 25° contact angle provides optimal performance in high-speed scenarios. Manufactured to P4 (ABEC-7) tolerance class, this bearing ensures minimal runout and vibration, making it ideal for high-reliability machinery where precision is non-negotiable.
7218 ACD/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning | Significance |
|---|---|---|
| ACD | 25° Contact Angle | Optimized for high axial load capacity and high-speed operation. |
| P4A | P4 (ABEC-7) Tolerance Class | Guarantees ultra-precise dimensions and running accuracy for critical applications. |
7218 ACD/P4A Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The 25° contact angle and robust construction enable the bearing to support significant combined loads. The phenolic cage ensures stable operation under high stress.
- Superior High-Speed Performance: The lightweight phenolic cage reduces centrifugal forces, contributing to a high limiting speed of 12,000 rpm. The optimized internal geometry minimizes friction and heat generation.
- Precision Engineering: Manufactured to P4 tolerance with tight dimensional controls on the bore diameter (90 mm), outside diameter (160 mm), and width (30 mm) for consistent, reliable performance in precision assemblies.
- Durable Material Construction: Components made from chrome steel offer high hardness and wear resistance, ensuring long service life even in demanding operating conditions.
7218 ACD/P4A Bearing Typical Application Areas
This bearing is specified for high-performance applications where precision and speed are critical. Key industries and equipment include:
- Machine Tool Spindles: For high-speed milling, grinding, and turning centers.
- Precision Gearboxes: Especially in robotics and aerospace drive systems.
- High-Frequency Motors and Spindles: Used in PCB drilling and semiconductor manufacturing equipment.
- Medical Equipment: Centrifuges and high-speed scanners.
