7008 CDGB/P4A
7000 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
7008 CDGB/P4A
Basic Information
System of measurement
Metric
Weight
0.19 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
15 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
3780 lbf
Radial static load rating
2475 lbf
Limiting speed
43 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Single
Number of bearings in matched set
3
Universal matching bearing
Universal Matchable (SU)
Preload
Light / Class B
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:
$ 81.66
/ each
In Stock
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7008 CDGB/P4A Bearing Product Overview & Core Advantages
The 7008 CDGB/P4A is a high-precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. Operating under the stringent P4A tolerance class, this bearing is engineered to handle combined loads efficiently, accommodating both radial and significant axial loads in one direction. Its universal matchable (SU) design allows for flexible mounting in various preload configurations, making it ideal for high-speed spindles and other precision machinery where stability and minimal runout are critical.
7008 CDGB/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7008 | Basic bearing series, indicating a 40mm bore, 68mm OD, and 15mm width. |
| C | 15° contact angle, optimized for high axial load capacity. |
| DGB | Universal Matchable (SU) bearing designed for light preload (Class B) when mounted in pairs or sets. |
| P4A | Super-precision tolerance class exceeding ABEC 7, ensuring extremely tight dimensional and running accuracy. |
7008 CDGB/P4A Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The angular contact design with a 15° contact angle provides excellent resistance to combined loads, delivering high system stiffness essential for precision applications.
- Super-Precision Performance: Manufactured to P4A tolerance class, this bearing guarantees minimal vibration and superior running accuracy, which is critical for high-speed spindles and machine tools.
- Optimized High-Speed Operation: The phenolic resin cage offers low friction and high strength, contributing to a high limiting speed of 43,000 rpm. The open seal type allows for efficient lubrication management in high-speed environments.
- Universal Matching Capability: As a Universal Matchable (SU) bearing, it can be paired in any combination to achieve specific preloads (Light / Class B), simplifying inventory and assembly for complex spindle designs.
7008 CDGB/P4A Bearing Typical Application Areas
This bearing is specifically engineered for high-performance applications, including:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Robotics: High-accuracy robotic arms and joints.
- High-Frequency Motors: Spindles for PCB drilling and small motor applications.
- Medical Equipment: Dental handpieces and imaging device rotors.
- Aerospace Instrumentation: Gyroscopes and navigation system components.
