7008 CE/HCP4AL1DT
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
7008 CE/HCP4AL1DT
Basic Information
System of measurement
Metric
Weight
0.34 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
7.144 mm
Ball quantity
19
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
4478 lbf
Radial static load rating
3442 lbf
Limiting speed
56 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Duplex Tandem (DT)
Number of bearings in matched set
2
Universal matching bearing
No (Standard)
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
In Stock
Price available upon request.
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7008 CE/HCP4AL1DT Bearing Product Overview & Core Advantages
The 7008 CE/HCP4AL1DT is a high-precision duplex tandem angular contact ball bearing designed for exceptional performance in demanding applications. This matched set configuration, consisting of two bearings, is engineered to handle primarily axial loads in one direction with superior rigidity and accuracy. Its defining features include a P4A super-precision tolerance class, a phenolic resin cage for high-speed operation, and ceramic balls that reduce centrifugal forces, lower operating temperatures, and enable higher limiting speeds. This bearing is preloaded and arrives lubricated, making it an ideal, ready-to-install solution for high-rigidity, high-speed spindles.
7008 CE/HCP4AL1DT Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning | Benefit |
|---|---|---|
| C | 15° Contact Angle | Optimized for combined radial and axial loads. |
| E | Optimized Internal Design | Enhanced performance and load capacity. |
| HC | Hybrid Ceramic (Silicon Nitride Balls) | Higher speed capability, reduced weight, and longer service life. |
| P4A | Super Precision Tolerance (ABEC 7) | Guarantees extreme running accuracy and system stability. |
| L1 | Light Preload | Eliminates internal clearance for maximum rigidity and precise shaft positioning. |
| DT | Duplex Tandem Arrangement | Two bearings mounted in tandem to share axial loads and increase axial load capacity. |
7008 CE/HCP4AL1DT Bearing Structural Features & Performance Benefits
- High Rigidity & Axial Load Capacity: The duplex tandem (DT) arrangement and light preload (L1) create an exceptionally rigid system capable of handling significant axial loads, making it ideal for applications requiring minimal shaft deflection.
- Superior High-Speed Performance: The combination of ceramic balls (HC) and a phenolic resin cage significantly reduces rotating mass and friction. This allows the bearing to achieve a high limiting speed of 56,000 rpm while maintaining lower operating temperatures.
- Exceptional Precision and Accuracy: Manufactured to P4A super-precision standards with tight dimensional tolerances, this bearing ensures minimal runout and vibration, which is critical for maintaining high positional accuracy.
- Optimized for Combined Loads: The 15° contact angle (C) provides an excellent balance, enabling the bearing to support both radial and axial combined loads effectively.
7008 CE/HCP4AL1DT Bearing Typical Application Areas
This bearing is specifically engineered for high-performance machinery where precision, speed, and rigidity are paramount. Key application areas include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling, engraving, and high-frequency motor spindles.
- High-Speed Robotic Drives: Joints and actuators requiring high accuracy and responsiveness.
- Medical Equipment: Dental handpieces and high-speed centrifuges.
- Aerospace & Defense Systems: Gyroscopes, navigation instruments, and radar systems.
