7018 CD/P4ADGA
7000 Series Super Precision Angular Contact Ball Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
7018 CD/P4ADGA
Basic Information
System of measurement
Metric
Weight
2.32 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
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
Lubricated
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
Price:
$ 487.62
/ each
In Stock
- Fast delivery
- Free shipping on orders over $200
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
7018 CD/P4ADGA Bearing Product Overview & Core Advantages
The 7018 CD/P4ADGA is a precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and high-speed performance. Manufactured to P4A tolerance class, this bearing delivers superior running accuracy and dimensional stability. Its extra light preload (Class A) minimizes deflection under light loads, making it ideal for high-precision spindles. The universal matchable (SU) design allows for flexible mounting arrangements in pairs to support combined loads, including significant axial loads from both directions, thanks to its 15° contact angle. Constructed from high-grade chrome steel and featuring a phenolic cage, it offers excellent durability and stable operation at high rotational speeds.
7018 CD/P4ADGA Bearing Model Code Explained, Specifications & Naming Convention
The model number 7018 CD/P4ADGA is decoded as follows:
- 7018: Basic series designation for a metric, angular contact ball bearing.
- C: Indicates a 15° contact angle, optimized for high-speed applications requiring high rigidity.
- D: Signifies the internal design and clearance/ preload specification. In this context, it is associated with the universal matchable (SU) feature.
- P4A: Denotes the tolerance class. P4A is a very high precision grade with tight tolerances on bore, outside diameter, and width, ensuring minimal runout and vibration.
- DGA: Indicates a specific preload group and internal clearance. Here, it corresponds to the Extra light preload (Class A).
7018 CD/P4ADGA Bearing Structural Features & Performance Benefits
- High Precision & Rigidity: Built to P4A tolerance class, this bearing ensures extremely low vibration and high running accuracy. The angular contact design and extra light preload provide high system rigidity, critical for maintaining precision under operational loads.
- Superior Load Capacity: The bearing is engineered to handle combined radial and axial loads simultaneously. With a dynamic load rating of 28,575 lbf and a static load rating of 34,425 lbf, it offers reliable performance in demanding conditions.
- Optimized High-Speed Performance: The 15° contact angle and phenolic resin cage are key to its high-speed capability, enabling a limiting speed of 15,000 rpm. The cage provides excellent strength-to-weight ratio and operates smoothly with minimal friction.
- Universal Matching Capability (SU): Designed as a universal matchable bearing, two bearings can be mounted in various arrangements (back-to-back, face-to-face, or tandem) to optimize performance for specific load and rigidity requirements, offering great design flexibility.
- Premium Material Construction: The use of chrome steel for rings and balls ensures high fatigue life and wear resistance, suitable for a wide operating temperature range from -30°C to 110°C.
7018 CD/P4ADGA Bearing Typical Application Areas
The 7018 CD/P4ADGA is ideally suited for high-precision, high-speed machinery and systems, including:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers requiring utmost precision and rigidity.
- Precision Spindles: Applications in PCB drilling, precision grinding, and other high-accuracy machining operations.
- High-Frequency Motors: Spindles for electric motors and generators that operate at very high rotational speeds.
- Medical Equipment: Critical components in high-speed dental handpieces and medical imaging devices.
- Aerospace & Defense Systems: Gyroscopes, radar systems, and other instrumentation requiring reliable, high-speed rotational elements.
