7008 CD/P4ADGC
7000 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
7008 CD/P4ADGC
Basic Information
System of measurement
Metric
Weight
0.38 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
40 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
68 mm
Outside diameter tolerance
-0.004mm to 0
Width
30 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
7.938 mm
Ball quantity
18
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
6210 lbf
Radial static load rating
4950 lbf
Limiting speed
43 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Universal Matchable (SU)
Number of bearings in matched set
2
Universal matching bearing
Universal Matchable (SU)
Preload
Moderate / Class C
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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7008 CD/P4ADGC Bearing Product Overview & Core Advantages
The 7008 CD/P4ADGC is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional rotational accuracy and rigidity. This universal matchable (SU) bearing is supplied as a pre-lubricated, moderate preload (Class C) pair, enabling it to handle combined radial and axial loads simultaneously. Manufactured to P4A tolerance class, it delivers superior running accuracy and is ideal for high-speed, high-rigidity spindles and precision machinery where uncompromising performance is critical.
7008 CD/P4ADGC Bearing Model Code Explained, Specifications & Naming Convention
The model number 7008 CD/P4ADGC is decoded as follows:
- 7008: Basic series designation for a metric angular contact ball bearing with a 40mm bore and 68mm outside diameter.
- C: Denotes a 15° contact angle, optimized for high-speed operation and moderate axial load capacity.
- D: Indicates the bearing is supplied as a universal matchable (SU) pair. Two bearings can be mounted in various configurations (back-to-back, face-to-face, or tandem) to achieve the desired rigidity and load capacity.
- P4A: Specifies the tolerance class, indicating very high precision for both dimensional and running accuracy.
- DGC: Signifies the moderate preload (Class C) applied to the bearing pair. This preload increases system rigidity, reduces vibration, and improves rotational accuracy.
7008 CD/P4ADGC Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The universal matchable pair (SU) design allows for versatile mounting arrangements that significantly enhance system rigidity. The 15° contact angle and moderate preload enable the bearing to effectively support combined loads, making it exceptionally stable under complex force conditions.
- Superior Precision: Manufactured to the stringent P4A tolerance class, this bearing guarantees minimal runout and exceptional rotational accuracy, which is paramount for applications like machine tool spindles.
- Optimized High-Speed Performance: The phenolic cage is lightweight and robust, contributing to lower centrifugal forces and stable operation at the high limiting speed of 43,000 rpm. The standard lubrication further supports reliable high-speed running.
- Durable Construction: Both rings and balls are made from high-grade chrome steel, providing excellent wear resistance and long service life under demanding operating conditions.
7008 CD/P4ADGC Bearing Typical Application Areas
This precision bearing is ideally suited for:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Grinding Spindles
- High-Frequency Motors
- Industrial Pumps and Compressors
- Medical and Dental Equipment Spindles
- Advanced Robotics and Automation
