71904 CDTP/HCP4B
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
71904 CDTP/HCP4B
Basic Information
System of measurement
Metric
Weight
0.033 kg
Tolerance class
P4 (ABEC-7)
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
20 mm
Bore diameter tolerance
-0.005mm to 0
Outside diameter
37 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
15
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
1361 lbf
Radial static load rating
720 lbf
Limiting speed
53 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:
$ 157.67
/ each
In Stock
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71904 CDTP/HCP4B Bearing Product Overview & Core Advantages
The 71904 CDTP/HCP4B is a single-row angular contact ball bearing engineered for ultra-high precision applications. Positioned in the P4 (ABEC-7) tolerance class, it delivers exceptional rotational accuracy and dimensional stability. A key advantage is its ability to accommodate combined loads—handling significant radial loads alongside thrust loads in one direction. The combination of a ceramic ball material and phenolic cage contributes to superior high-speed performance and reduced rotating mass, making it ideal for demanding, high-RPM machinery where reliability and precision are paramount.
71904 CDTP/HCP4B Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning | Significance & Benefit |
|---|---|---|
| CDT | 15° Contact Angle, High Precision | Optimized for high-speed operation and precise axial load carrying capacity. |
| P | Preload Applied | Eliminates internal clearance, resulting in high rigidity and improved shaft positioning accuracy. |
| HC | Hybrid Ceramic (Silicon Nitride Balls) | Reduces friction, heat generation, and weight; enhances high-speed capability and service life. |
| P4B | Enhanced P4 Tolerance Class | Guarantees extremely tight dimensional and running accuracy for the most demanding precision applications. |
71904 CDTP/HCP4B Bearing Structural Features & Performance Benefits
- High Rigidity and Precision: The application of a preload ensures minimal axial and radial deflection under load, providing exceptional stiffness for precise shaft guidance.
- Superior High-Speed Performance: The hybrid ceramic design with silicon nitride balls significantly lowers centrifugal forces and friction. Combined with the lightweight phenolic resin cage, this allows for a very high limiting speed of 53,000 rpm.
- Optimized Load Capacity: The 15° contact angle is engineered to efficiently handle combined radial and axial loads, making it suitable for applications with complex loading conditions.
- Extended Service Life: Ceramic balls are electrically insulating, harder, and more wear-resistant than steel, leading to reduced wear and a longer operational lifespan, especially in contaminated or electrically challenging environments.
71904 CDTP/HCP4B Bearing Typical Application Areas
This precision angular contact bearing is ideally suited for high-performance machinery requiring high rotational speeds and extreme accuracy. Key application areas include:
- High-Frequency Machine Tool Spindles
- Precision Grinding Spindles
- High-Speed Robotic Arms and Drives
- Advanced Medical and Dental Equipment (e.g., high-speed handpieces, scanners)
- Aerospace Actuators and Instrumentation
- Semiconductor Manufacturing Equipment
