7008 CB/P4A
7000 Series Super Precision Angular Contact Ball Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
7008 CB/P4A
Basic Information
System of measurement
Metric
Weight
0.21 kg
Tolerance class
P4 (ABEC-7)
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
40 mm
Bore diameter tolerance
-0.006mm to 0
Outside diameter
68 mm
Outside diameter tolerance
-0.007mm to 0
Width
15 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
4.762 mm
Ball quantity
26
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
1667 lbf
Radial static load rating
1260 lbf
Limiting speed
43 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Single
Preload
Available
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:
$ 214.39
/ each
In Stock
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7008 CB/P4A Bearing Product Overview & Core Advantages
The 7008 CB/P4A is a high-precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. Engineered to a P4 (ABEC-7) tolerance class, it is optimized to handle combined loads, accommodating significant radial loads and axial loads in one direction. Its single-row design with a 15° contact angle provides high-speed capability and precise shaft positioning. Pre-loaded and pre-lubricated, this bearing is ready for installation, offering high reliability in precision machinery and high-performance systems.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| 7008 | Basic bearing series, indicating a metric, angular contact design with a 40mm bore, 68mm OD, and 15mm width. |
| CB | Specific internal design and contact angle of 15°, providing optimized load distribution. |
| P4A | Indicates a high-precision tolerance class equivalent to ABEC-7. The 'A' suffix may denote specific accuracy or fitting requirements. |
7008 CB/P4A Bearing Structural Features & Performance Benefits
- High Rigidity and Precision: Manufactured to P4 tolerance with a phenolic resin cage, this bearing ensures minimal runout and stable operation under high-speed conditions, contributing to superior system stiffness.
- Superior Load Capacity: The 15° contact angle and chrome steel construction enable it to efficiently support combined radial and axial loads, making it suitable for applications with complex loading.
- Optimized High-Speed Performance: The lightweight phenolic cage and precision-ground components allow for a high limiting speed of 43,000 rpm, reducing centrifugal forces and heat generation.
- Pre-Lubricated and Ready-to-Use: Arrives pre-lubricated, facilitating immediate installation and ensuring optimal performance from startup within the specified temperature range of -30°C to 110°C.
7008 CB/P4A Bearing Typical Application Areas
This precision angular contact ball bearing is ideally suited for high-performance applications, including:
- Machine Tool Spindles
- High-Speed CNC Machining Centers
- Precision Grinding Spindles
- High-Frequency Motors and Spindles
- Medical and Dental Equipment
- Aerospace Instrumentation
