S7018 ACD/P4ATBTB
Sealed Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
S7018 ACD/P4ATBTB
Basic Information
System of measurement
Metric
Weight
3.5 kg
Tolerance class
P4A
Seal type
Sealed
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
Grease
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
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In Stock
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S7018 ACD/P4ATBTB Bearing Product Overview & Core Advantages
The S7018 ACD/P4ATBTB is a precision angular contact ball bearing configured in a triplex back-to-back (TBT) matched set. Engineered for applications demanding exceptional rotational accuracy and rigidity, this bearing arrangement excels at handling combined loads—significant radial loads alongside substantial axial loads in both directions. Manufactured to the stringent P4A tolerance class, it delivers superior running accuracy and is pre-lubricated with grease for immediate use, making it an ideal solution for high-performance, high-reliability machinery.
S7018 ACD/P4ATBTB Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| ACD | Angular Contact Design with a 25° contact angle. |
| P4A | Indicates a high-precision tolerance class exceeding ABEC 7/ISO P4 standards. |
| TBT | Denotes a Triplex Back-to-Back matched set of three bearings. |
| Sealed | Features integral seals to retain lubricant and exclude contaminants. |
S7018 ACD/P4ATBTB Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The triplex back-to-back arrangement creates an extremely rigid bearing system capable of supporting heavy combined radial and axial loads from both directions. The 25° contact angle is optimized for high axial load capacity.
- Precision & High-Speed Performance: The P4A tolerance class ensures minimal runout and vibration. The lightweight phenolic cage and optimized internal geometry contribute to stable operation at high speeds, with a limiting speed of 15,000 rpm.
- Durability & Simplified Maintenance: Constructed from through-hardened chrome steel and sealed for life, this pre-lubricated set offers long-term, maintenance-free operation within a temperature range of -30°C to 110°C.
S7018 ACD/P4ATBTB Bearing Typical Application Areas
This bearing is designed for the most demanding applications, including:
- Machine Tool Spindles for milling, grinding, and turning centers
- High-speed Precision Spindles
- Industrial Pumps and Compressors
- Advanced Robotic Drives and Actuators
