7008 CD/P4A
7000 Series Super Precision Angular Contact Ball Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
7008 CD/P4A
Basic Information
System of measurement
Metric
Weight
0.19 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
7.938 mm
Ball quantity
18
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
3780 lbf
Radial static load rating
2475 lbf
Limiting speed
32 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:
$ 56.93
/ each
In Stock
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7008 CD/P4A Bearing Product Overview & Core Advantages
The 7008 CD/P4A is a precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. As a single-row bearing with a 15° contact angle, it excels at supporting combined radial and axial loads simultaneously. Manufactured to the stringent P4 (ABEC-7) tolerance class, it ensures minimal runout and vibration, making it ideal for high-speed spindles and other high-precision machinery. Its compact design, with a 40 mm bore and 68 mm outside diameter, provides a high-performance solution in a minimal space envelope.
7008 CD/P4A Bearing Model Code Explained, Specifications & Naming Convention
The model number 7008 CD/P4A provides specific technical information:
- 7008: Basic designation indicating a 40 mm bore, 68 mm OD, 15 mm width metric bearing.
- C: Denotes a 15° contact angle, optimized for high-speed operation and moderate axial load capacity.
- D: Indicates the bearing is supplied with a specific preload for enhanced rigidity and precise shaft positioning.
- P4A: Specifies the tolerance class. P4 is equivalent to ABEC-7, denoting very high precision. The "A" suffix often indicates specific accuracy and performance characteristics within this class.
7008 CD/P4A Bearing Structural Features & Performance Benefits
- High Rigidity and Precision: The angular contact design and factory-set preload significantly increase system stiffness, reducing deflection under load and enabling superior machining accuracy and surface finishes.
- Optimized for High Speeds: The lightweight phenolic resin cage minimizes centrifugal forces, reduces friction, and contributes to the bearing's high limiting speed of 32,000 rpm. The 15° contact angle is ideal for such high-speed applications.
- Superior Load Capacity: Engineered to handle combined loads, it offers a dynamic load rating of 3780 lbf and a static load rating of 2475 lbf, ensuring long-term reliability in demanding conditions.
- Pre-Lubricated for Immediate Use: The bearing comes lubricated from the factory, ready for installation and initial operation, simplifying the assembly process.
7008 CD/P4A Bearing Typical Application Areas
This bearing is a critical component in equipment where high speed, precision, and rigidity are paramount. Key applications include:
- Machine Tool Spindles: For CNC milling centers, grinding spindles, and lathes.
- High-Speed Motors and Drives: Used in electric spindles and high-frequency motors.
- Precision Instrumentation: In medical devices, optical scanners, and coordinate measuring machines.
- Aerospace and Defense Systems: For gyroscopes, radar systems, and other critical rotating assemblies.
