7018 CDGC/P4A
7000 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
7018 CDGC/P4A
Basic Information
System of measurement
Metric
Weight
1.16 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
24 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
17842 lbf
Radial static load rating
17212 lbf
Limiting speed
15 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Single
Number of bearings in matched set
3
Universal matching bearing
Universal Matchable (SU)
Preload
Moderate / Class C
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Phenolic
Technical Drawings
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In Stock
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7018 CDGC/P4A Bearing Product Overview & Core Advantages
The 7018 CDGC/P4A is a high-precision, single-row angular contact ball bearing designed for demanding applications requiring exceptional rotational accuracy and rigidity. Engineered to a P4A tolerance class, it offers superior dimensional stability and runout control. This bearing is optimized to support combined loads, efficiently handling significant radial loads and thrust loads in one direction. Its moderate preload (Class C) ensures high system stiffness and precise shaft positioning, making it an ideal choice for high-performance spindles and precision machinery where high rigidity and reliability are paramount.
7018 CDGC/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Model Suffix | Technical Meaning |
|---|---|
| CD | Indicates a 15° contact angle and that the bearing is part of a Universal Matchable (SU) set. This allows for precise preload control when mounted in a specific arrangement (back-to-back, face-to-face, or tandem) with other bearings from the same matched set. |
| GC | Specifies the moderate preload level (Class C). This preload enhances system rigidity and minimizes axial and radial play under operational conditions. |
| P4A | Denotes an ultra-high precision tolerance class, exceeding ABEC 7 standards. This ensures extremely tight tolerances on bore diameter, outside diameter, and width for superior running accuracy. |
7018 CDGC/P4A Bearing Structural Features & Performance Benefits
- High Rigidity and Precision: The single-row design with a 15° contact angle and moderate preload provides excellent resistance to deflection, ensuring high positional accuracy and stability of the spindle or shaft.
- Superior Load Capacity: Engineered to handle combined radial and axial loads simultaneously. With a dynamic load rating of 17,842 lbf and a static load rating of 17,212 lbf, it offers reliable performance under significant stress.
- Optimized High-Speed Performance: The lightweight phenolic resin cage reduces centrifugal forces, contributing to a high limiting speed of 15,000 rpm. The open design facilitates efficient lubrication management for cooler operation at high speeds.
- Precision Materials and Construction: Manufactured from chrome steel for both rings and balls, ensuring high durability and fatigue resistance. The tight P4A tolerances guarantee consistent, high-precision performance.
7018 CDGC/P4A Bearing Typical Application Areas
This bearing is specifically designed for high-end applications where precision and speed are critical. Key industries and equipment include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Grinding Spindles: Internal and external grinding machines.
- High-Frequency Motors: Spindles for PCB drilling and other high-RPM applications.
- Robotic Drives and Servo Motors: Where high accuracy and rigidity are required for precise motion control.
