7008 CDTP/HCP4B
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
7008 CDTP/HCP4B
Basic Information
System of measurement
Metric
Weight
0.17 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
24 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Single
Preload
Available
Materials
Ring material
Chrome Steel
Ball material
Ceramic
Cage material
Phenolic
Technical Drawings
No drawings available at the moment, will be launched soon
Price:
$ 214.02
/ each
In Stock
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7008 CDTP/HCP4B Bearing Product Overview & Core Advantages
The 7008 CDTP/HCP4B is a high-precision angular contact ball bearing engineered for demanding applications requiring exceptional accuracy and performance. This single-row bearing is distinguished by its ceramic balls and P4 (ABEC-7) tolerance class, ensuring ultra-low runout and superior rotational precision. Its key advantage lies in its ability to handle high-speed operations up to 24,000 rpm while supporting significant combined loads (radial and axial). The 15° contact angle is optimized for high axial load capacity, and the availability of preload allows for enhanced system rigidity and reduced vibration, making it ideal for high-reliability, high-speed spindles and precision machinery.
7008 CDTP/HCP4B Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7008 | Basic bearing series designation, indicating a metric series angular contact ball bearing with a 40mm bore, 68mm OD, and 15mm width. |
| C | Specifies a 15° contact angle, optimized for high axial load capacity. |
| D | Indicates a high preload level, providing maximum system rigidity and rotational accuracy. |
| T | Denotes a phenolic (polyamide) cage, which offers excellent performance at high speeds due to its light weight and good sliding properties. |
| P | Signifies that the bearing is lubricated from the factory. |
| HCP4B | This suffix combination indicates a hybrid ceramic bearing (HCP) with P4 precision tolerance (ABEC-7). The "B" suffix may refer to specific internal design or clearance modifications. |
7008 CDTP/HCP4B Bearing Structural Features & Performance Benefits
- Hybrid Ceramic Construction: The combination of chrome steel rings and ceramic (silicon nitride) balls significantly reduces centrifugal forces, lowers operating temperature, and extends service life, especially at very high speeds. Ceramic balls are also electrically insulating and highly resistant to wear.
- High-Speed Phenolic Cage: The phenolic cage is lightweight and robust, contributing to the bearing's exceptional limiting speed of 24,000 rpm. It provides excellent dimensional stability and low friction.
- Superior Rigidity and Accuracy: The application of a high preload (D) and the P4 precision tolerance class ensure minimal axial and radial deflection, resulting in superior positional accuracy, reduced vibration, and enhanced high rigidity for the entire spindle assembly.
- Optimized Load Capacity: The 15° contact angle design provides an excellent balance, offering high radial dynamic load rating (3780 lbf) and substantial axial load capacity, making it suitable for combined loads.
7008 CDTP/HCP4B Bearing Typical Application Areas
This high-performance bearing is ideally suited for applications where speed, precision, and rigidity are paramount. Key industries and equipment include:
- High-Frequency CNC Spindles for milling, grinding, and drilling
- Precision Machine Tool Main Shafts
- High-Speed Robotics and Automation Arms
- Aerospace & Defense instrumentation and control systems
- Medical Equipment such as high-speed dental handpieces and surgical drills
