71905 CE/HCP4ADT
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
71905 CE/HCP4ADT
Basic Information
System of measurement
Metric
Weight
0.072 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
25 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
42 mm
Outside diameter tolerance
-0.004mm to 0
Width
18 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
4.762 mm
Ball quantity
16
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
1960 lbf
Radial static load rating
1260 lbf
Limiting speed
100.5 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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71905 CE/HCP4ADT Bearing Product Overview & Core Advantages
The 71905 CE/HCP4ADT is a precision angular contact ball bearing designed for demanding applications requiring exceptional performance. This duplex tandem (DT) arrangement consists of two preloaded bearings, delivering superior high rigidity and axial load capacity in one direction. Featuring a P4A tolerance class and ceramic balls, it is engineered for high-speed operation and exceptional rotational accuracy, making it ideal for high-reliability, precision machinery.
71905 CE/HCP4ADT Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71905 | Basic bearing series and size designation (25mm bore, 42mm OD, 18mm width). |
| CE | Contact angle of 15°. |
| HC | Hybrid Ceramic: Signifies the use of ceramic balls with steel rings. |
| P4A | High precision tolerance class for exceptional running accuracy. |
| DT | Duplex Tandem arrangement: Two bearings matched for increased axial load capacity in one direction. |
71905 CE/HCP4ADT Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The duplex tandem arrangement and 15° contact angle create a highly rigid setup capable of handling significant one-direction axial loads and combined loads, ensuring stable shaft positioning.
- Superior High-Speed Performance: The combination of ceramic balls (lower density, reduced centrifugal force) and a lightweight phenolic cage allows for a very high limiting speed of 100,500 rpm, minimizing friction and heat generation.
- Precision Engineering: Manufactured to P4A tolerance class with a chrome steel ring structure, this bearing guarantees minimal runout and vibration for applications demanding the highest levels of accuracy.
- Optimized for Performance: The open design is lubricated for immediate use, and the hybrid construction offers advantages in electrically sensitive or high-temperature environments due to the properties of ceramic.
71905 CE/HCP4ADT Bearing Typical Application Areas
This bearing is ideally suited for high-performance applications, including:
- Machine Tool Spindles
- High-Frequency Motors
- Precision Grinding Spindles
- Aerospace Control Systems
- Medical and Dental Handpieces
