S7018 CD/P4ADGA
Sealed Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
S7018 CD/P4ADGA
Basic Information
System of measurement
Metric
Weight
2.33 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
48 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
28575 lbf
Radial static load rating
34425 lbf
Limiting speed
15 X 1000 rpm
Lubrication
Grease
Matched arrangement
Universal Matchable (SU)
Number of bearings in matched set
2
Universal matching bearing
Universal Matchable (SU)
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/P4ADGA Bearing Product Overview & Core Advantages
The S7018 CD/P4ADGA is a precision angular contact ball bearing designed for high-performance applications. Engineered to the exacting P4A tolerance class, it delivers exceptional running accuracy and rotational stability. A key feature is its Universal Matchable (SU) design, allowing two bearings to be universally paired for optimal performance in preloaded arrangements. This configuration enables the bearing to handle combined loads efficiently, supporting significant radial loads and axial loads in both directions. Its extra light preload (Class A) minimizes deflection under light loads, making it ideal for high-speed spindles and other high-rigidity, precision machinery.
S7018 CD/P4ADGA Bearing Model Code Explained, Specifications & Naming Convention
| Model Segment | Code | Technical Meaning |
|---|---|---|
| Basic Design | S7018 | Standard metric series, 90mm bore, 140mm OD. |
| Internal Design | CD | Specific internal geometry optimized for 15° contact angle and high-speed operation. |
| Tolerance Class | P4A | High-precision grade with enhanced dimensional and running accuracy tolerances. |
| Clearance/Preload | DG | Specifies the universal matchable (SU) pairing designation for duplex sets. |
| Cage & Lubrication | A | Indicates a phenolic resin cage and standard factory grease lubrication. |
S7018 CD/P4ADGA Bearing Structural Features & Performance Benefits
- High Rigidity & Precision: Manufactured to P4A tolerance class with extremely tight dimensional tolerances on the bore, outside diameter, and width. This ensures minimal runout and superior rotational accuracy, which is critical for high-speed and high-precision applications.
- Superior Load Capacity: The 15° contact angle and robust construction provide excellent capability for combined radial and axial loads. With a dynamic load rating of 28,575 lbf and a static load rating of 34,425 lbf, it is built for demanding operational conditions.
- Optimized High-Speed Performance: The lightweight phenolic cage reduces centrifugal forces, contributing to a high limiting speed of 15,000 rpm. The standard grease lubrication is suitable for a wide temperature range from -30°C to 110°C.
- Universal Matching (SU): This feature allows any two S7018 CD/P4ADGA bearings to be universally paired in a back-to-back (DB), face-to-face (DF), or tandem (DT) arrangement without selective assembly, simplifying installation and ensuring consistent, high-performance preload.
S7018 CD/P4ADGA Bearing Typical Application Areas
This bearing is engineered for high-performance machinery requiring exceptional precision and speed. Key application areas include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Rotary Systems: Industrial robots, CNC rotary tables, and indexing heads.
- High-Frequency Motors & Spindles: Applications where minimal vibration and high running accuracy are paramount.
- Medical & Laboratory Equipment: Centrifuges and other precision instruments.
