71808 CD/HCP4
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
71808 CD/HCP4
Basic Information
System of measurement
Metric
Weight
0.029 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
52 mm
Outside diameter tolerance
-0.007mm to 0
Width
7 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
3.175 mm
Ball quantity
29
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
1098 lbf
Radial static load rating
1102 lbf
Limiting speed
45 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:
$ 379.01
/ each
In Stock
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71808 CD/HCP4 Bearing Product Overview & Core Advantages
The 71808 CD/HCP4 is a single-row angular contact ball bearing engineered for applications demanding ultra-high precision and exceptional speed performance. Designed to accommodate primarily axial loads in one direction, combined with moderate radial loads, its compact cross-section makes it ideal for space-constrained, high-speed spindles. Key advantages include its P4 (ABEC-7) tolerance class for superior running accuracy, a ceramic ball and phenolic cage combination for reduced centrifugal forces and lower operating temperatures, and the availability of preload for enhanced system rigidity.
71808 CD/HCP4 Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71808 | Basic bearing designation indicating a metric, ultra-light series with a 40mm bore. |
| CD | Signifies a 15° contact angle and a specific internal design optimized for high-speed operation and high rigidity. |
| HC | Indicates the use of Hybrid Ceramic balls (Silicon Nitride). |
| P4 | Denotes the tolerance class, equivalent to ABEC-7, ensuring extremely tight dimensional and running accuracy. |
71808 CD/HCP4 Bearing Structural Features & Performance Benefits
- Hybrid Ceramic Construction: The combination of chrome steel rings and ceramic balls significantly reduces friction, heat generation, and wear. This allows for a higher limiting speed (45,000 rpm) and extended service life, especially in demanding applications.
- Phenolic Resin Cage: The lightweight and robust phenolic cage offers excellent dimensional stability and low friction at high speeds, contributing to smooth operation and reduced vibration.
- High-Precision P4 Tolerance: Manufactured to P4 precision class, this bearing guarantees minimal runout and superior rotational accuracy, which is critical for applications like machine tool spindles.
- 15° Contact Angle & Preload: The 15° contact angle is optimized for high-speed applications requiring high rigidity. The availability of preload options allows for the elimination of axial play, resulting in a stiffer bearing system with improved positional accuracy.
71808 CD/HCP4 Bearing Typical Application Areas
This high-precision, high-speed bearing is ideally suited for:
- Machine Tool Spindles: High-speed milling, grinding, and drilling spindles.
- Precision Robotics: Arm joints and high-accuracy rotary axes.
- High-Frequency Motors & Spindles: Motors for PCB drilling and dental handpieces.
- Aerospace & Defense Systems: Gyroscopes, radar systems, and other precision instrumentation.
