7018 ACD/P4ATBTB
7000 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
7018 ACD/P4ATBTB
Basic Information
System of measurement
Metric
Weight
3.47 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
140 mm
Outside diameter tolerance
-0.004mm to 0
Width
72 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
15.875 mm
Ball quantity
20
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
36675 lbf
Radial static load rating
48600 lbf
Limiting speed
15 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Triplex Back-to-Back (TBT)
Number of bearings in matched set
3
Universal matching bearing
No (Standard)
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
Price:
$ 774.02
/ each
In Stock
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7018 ACD/P4ATBTB Bearing Product Overview & Core Advantages
The 7018 ACD/P4ATBTB is a super-precision angular contact ball bearing configured in a triplex back-to-back (TBT) matched set. Engineered for the most demanding applications, this bearing set delivers exceptional high rigidity and stability under complex loading conditions. Its P4A tolerance class ensures ultra-precise rotational accuracy, making it ideal for high-speed spindles and other precision machinery where minimal runout and superior performance are critical. The matched set is pre-lubricated and ready for installation, providing optimized performance right from the start.
7018 ACD/P4ATBTB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7018 | Basic bearing series and size designation. |
| ACD | 25° contact angle, a standard for angular contact bearings balancing axial and radial load capacity. |
| P4A | Indicates a super-precision tolerance class, exceeding ABEC 7/ISO P4 standards for enhanced running accuracy. |
| TBT | Specifies the bearing arrangement as a Triplex Back-to-Back matched set of three bearings. |
7018 ACD/P4ATBTB Bearing Structural Features & Performance Benefits
- Exceptional Rigidity and Stability: The triplex back-to-back (TBT) arrangement creates a highly rigid bearing system that effectively resists moment loads and shaft deflection, ensuring precise positioning and smooth operation.
- Superior Load Capacity: With a 25° contact angle and three bearings in a set, this configuration offers a high combined load rating, capable of handling significant radial and axial loads simultaneously.
- High-Speed Capability: The phenolic resin cage is lightweight and robust, contributing to lower centrifugal forces and stable operation at high speeds, with a limiting speed of 15,000 rpm.
- Precision Performance: Manufactured to P4A tolerance class with a light preload (Class B), this set guarantees minimal vibration, low noise, and exceptional running accuracy for precision applications.
- Durable Construction: Made from high-grade chrome steel for both rings and balls, ensuring long service life and reliability under demanding conditions.
7018 ACD/P4ATBTB Bearing Typical Application Areas
This super-precision triplex bearing set is specifically designed for high-performance machinery requiring utmost accuracy and rigidity. Key applications include:
- High-Speed Machine Tool Spindles (e.g., CNC milling, grinding, and turning centers)
- Precision Grinding Spindles
- High-Frequency Machining Centers
- Industrial High-Speed Pumps and Compressors
- Advanced Robotics and Automation Systems
