7018 CD/P4ADGB
7000 Series Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
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Materials
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7018 CD/P4ADGB Bearing Product Overview & Core Advantages
The 7018 CD/P4ADGB is a precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. As a universal matchable (SU) bearing supplied in a pre-set pair, it is engineered to accommodate combined loads (radial and axial) simultaneously. Its defining characteristics include a P4A tolerance class for superior running accuracy, a light preload (Class B) for reduced noise and vibration, and a phenolic cage optimized for high-speed performance. This configuration makes it an ideal solution for high-precision, high-reliability spindles and machinery.
7018 CD/P4ADGB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Significance |
|---|---|---|
| 7018 | Basic bearing series, defining the bearing dimensions (90mm bore, 140mm OD, 48mm width). | Standardized size for interchangeability and design. |
| CD | Specifies a 15° contact angle and universal matchable (SU) design. | Enables flexible mounting arrangements (DB, DF, DT) to handle various load conditions. |
| P4A | Indicates a high-precision tolerance class exceeding ABEC 7. | Ensures minimal runout and vibration for superior performance in precision applications. |
| DGB | Denotes a light preload (Class B) applied to the bearing pair. | Increases system rigidity, reduces deflection under load, and improves positional accuracy. |
7018 CD/P4ADGB Bearing Structural Features & Performance Benefits
- High Rigidity and Load Capacity: The universal matchable pair and 15° contact angle are engineered to provide high system rigidity and reliably support significant combined loads, including thrust loads in both directions when mounted appropriately.
- Optimized High-Speed Performance: The lightweight phenolic cage minimizes centrifugal forces, reduces friction, and allows for a high limiting speed of 15,000 rpm. The open design facilitates efficient lubrication and heat dissipation.
- Precision Engineering: Manufactured to a P4A tolerance class with tight dimensional tolerances on the bore, outside diameter, and width, this bearing ensures exceptional running accuracy and consistency.
- Superior Material: Constructed from chrome steel for both rings and balls, providing high hardness, wear resistance, and a long operational lifespan under demanding conditions.
7018 CD/P4ADGB Bearing Typical Application Areas
The 7018 CD/P4ADGB is specified for high-performance applications where precision, speed, and rigidity are paramount. Key industries and equipment include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling, semiconductor manufacturing equipment.
- High-Frequency Motors: Spindles for routers and other high-RPM machinery.
- Medical Equipment: Dental handpieces and precision laboratory instruments.
