71905 CDTP/HCP4B
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
71905 CDTP/HCP4B
Basic Information
System of measurement
Metric
Weight
0.039 kg
Tolerance class
P4 (ABEC-7)
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
25 mm
Bore diameter tolerance
-0.005mm to 0
Outside diameter
42 mm
Outside diameter tolerance
-0.006mm to 0
Width
9 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
4.762 mm
Ball quantity
18
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
1521 lbf
Radial static load rating
900 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:
$ 177.17
/ each
In Stock
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71905 CDTP/HCP4B Bearing Product Overview & Core Advantages
The 71905 CDTP/HCP4B is a single-row angular contact ball bearing engineered for applications demanding exceptional precision and high-speed performance. This P4 (ABEC-7) tolerance class bearing is designed to accommodate primarily axial loads in one direction and combined loads. Its key advantages include a ceramic ball construction for reduced weight and superior high-speed capability, a phenolic cage for optimal performance at high rotational speeds, and a factory-applied lubrication suitable for its operational temperature range. The bearing is supplied with a specified preload, ensuring high system rigidity and precise rotational accuracy from installation.
71905 CDTP/HCP4B Bearing Model Code Explained, Specifications & Naming Convention
| Model Segment | Technical Meaning |
|---|---|
| 71905 | Standard designation for a high-precision angular contact bearing series with a 25 mm bore. |
| C | Specifies a 15° contact angle, optimized for high-speed applications. |
| DTP | Indicates a duplex pair configuration (two bearings mounted as a set). |
| HC | Signifies the use of hybrid ceramic balls (ceramic balls with steel rings). |
| P4 | Denotes a P4 (ABEC-7) tolerance class, representing very high running accuracy. |
| B | Indicates a 40° contact angle (Note: This may be a conflict with the "C" designation; typically, the suffix "B" denotes a 40° contact angle. Please verify the exact configuration with the manufacturer). |
71905 CDTP/HCP4B Bearing Structural Features & Performance Benefits
- Hybrid Ceramic Construction: The combination of chrome steel rings and silicon nitride (Si3N4) ceramic balls significantly reduces rotating mass, lowers centrifugal forces, and minimizes friction. This results in a higher limiting speed (45,000 rpm), reduced operating temperature, and extended service life.
- Phenolic Resin Cage: The lightweight and robust phenolic cage provides excellent dimensional stability and guidance at very high speeds, contributing to the bearing's superior high-speed performance.
- Precision & Rigidity: Manufactured to P4 tolerance and supplied with a preload, this bearing ensures minimal runout, high positional accuracy, and increased system stiffness, which is critical for applications requiring precise shaft positioning.
- High Load Capacity: With a dynamic load rating of 1521 lbf and a static load rating of 900 lbf, it offers reliable performance under demanding combined load conditions.
71905 CDTP/HCP4B Bearing Typical Application Areas
This high-precision, high-speed angular contact ball bearing is ideally suited for advanced applications where speed, accuracy, and rigidity are paramount. Key industries and equipment include:
- High-Frequency Machine Tool Spindles
- Precision Grinding Spindles
- High-Speed Robotic Arms and Drives
- Aerospace Actuators and Control Systems
- Medical and Dental Drill Handpieces
- Turbochargers and Compressors
