7008 CD/P4ADBA
7000 Series Super Precision Angular Contact Ball Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
7008 CD/P4ADBA
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
41 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Duplex Back-to-Back (DB)
Number of bearings in matched set
2
Universal matching bearing
No (Standard)
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:
$ 163.42
/ each
In Stock
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7008 CD/P4ADBA Bearing Product Overview & Core Advantages
The 7008 CD/P4ADBA is a precision duplex angular contact ball bearing designed for applications requiring exceptional rotational accuracy and rigidity. This matched back-to-back arrangement (DB) provides superior stiffness and the ability to withstand combined loads, including significant radial and bidirectional axial loads. Manufactured to P4A tolerance class with an extra light preload, it delivers high running accuracy and is ideally suited for high-speed spindles and other precision machinery demanding maximum performance and reliability.
7008 CD/P4ADBA Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| CD | Indicates a duplex bearing with a specific internal clearance and preload. |
| P4A | Denotes a high-precision tolerance class with dimensional and running accuracy exceeding ABEC 7 standards. |
| DB | Specifies the Back-to-Back mounting arrangement of the matched pair. |
| A | Signifies the Extra Light Preload class, minimizing friction and heat generation at high speeds. |
7008 CD/P4ADBA Bearing Structural Features & Performance Benefits
- High Rigidity & Stability: The duplex back-to-back (DB) design creates a wide, rigid support system that effectively resists moment loads and shaft deflection, ensuring exceptional operational stability.
- Superior Load Capacity: The 15° contact angle and optimized internal geometry enable the bearing to handle significant combined radial and axial loads simultaneously.
- High-Speed Performance: The lightweight phenolic resin cage ensures excellent guidance and low centrifugal forces, contributing to a high limiting speed of 41,000 rpm. The extra light preload further reduces friction and heat buildup.
- Precision & Longevity: Manufactured from high-grade chrome steel and held to P4A precision tolerances, this bearing guarantees high running accuracy, low noise, and extended service life in demanding applications.
7008 CD/P4ADBA Bearing Typical Application Areas
This bearing is engineered for high-performance applications, including:
- Machine Tool Spindles (High-speed milling, grinding)
- Precision Grinding Spindles
- High-Frequency Motors
- Medical & Dental Equipment Spindles
- Aerospace Test Rigs
