S7018 CD/P4ATBTA
Sealed Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
S7018 CD/P4ATBTA
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
15 °
Ball & Washer Dimensions
Ball diameter
15.875 mm
Ball quantity
20
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
38700 lbf
Radial static load rating
51300 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
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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S7018 CD/P4ATBTA Bearing Product Overview & Core Advantages
The S7018 CD/P4ATBTA is a metric system, P4A super-precision angular contact ball bearing designed for the most demanding applications. Its core advantage lies in its triplex back-to-back (TBT) matched set configuration, providing exceptional system rigidity and stability under complex combined loads (radial and axial). This preloaded, sealed assembly offers a compact, high-performance solution for spindles requiring the utmost in running accuracy and high-speed capability.
S7018 CD/P4ATBTA Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning | Benefit |
|---|---|---|
| CD | 15° contact angle and specific internal design | Optimized for high-speed operation and axial load capacity. |
| P4A | Tolerance class superior to ABEC 7 / ISO P4 | Guarantees extremely high precision and minimal runout for superior performance. |
| TB | Back-to-Back mounting arrangement | Provides high moment rigidity and excellent operational stability. |
| TA | Matched set of 3 bearings with Extra Light (A) preload | Ensures immediate, precise response and eliminates internal clearance for maximum system stiffness. |
S7018 CD/P4ATBTA Bearing Structural Features & Performance Benefits
- Triplex Back-to-Back (TBT) Matched Set: This configuration delivers superior rigidity, making it exceptionally resistant to moment loads and deflection, which is critical for maintaining precision under heavy cutting forces.
- High-Speed Performance: The combination of a phenolic cage, a 15° contact angle, and grease lubrication enables a high limiting speed of 15,000 rpm, suitable for modern high-speed machining centers.
- Exceptional Load Capacity: With a dynamic load rating of 38,700 lbf and a static load rating of 51,300 lbf, this bearing set is engineered to handle significant combined radial and axial loads.
- Sealed & Pre-Lubricated Design: The integral seals protect against contamination and retain grease, offering a maintenance-free solution throughout its service life within the specified temperature range (-30°C to 110°C).
- Precision Ground Components: Manufactured to P4A tolerances with tight bore and outside diameter tolerances, ensuring perfect fitment and concentricity for vibration-free operation.
S7018 CD/P4ATBTA Bearing Typical Application Areas
This bearing is specifically engineered for high-performance applications where precision, speed, and rigidity are paramount. Key industries and machinery include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling, engraving, and jig boring machines.
- High-Frequency Motors: Spindles for integrally mounted motor spindles.
- Other Precision Rotary Equipment: High-speed pumps and compressors requiring minimal runout.
