71911 CE/HCP4ADGA
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
71911 CE/HCP4ADGA
Basic Information
System of measurement
Metric
Weight
0.29 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
55 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
80 mm
Outside diameter tolerance
-0.004mm to 0
Width
26 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
7.938 mm
Ball quantity
21
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
5648 lbf
Radial static load rating
4770 lbf
Limiting speed
34 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Universal Matchable (SU)
Number of bearings in matched set
2
Universal matching bearing
Universal Matchable (SU)
Preload
Extra light / Class A
Materials
Ring material
Chrome Steel
Ball material
Ceramic
Cage material
Phenolic
Technical Drawings
No drawings available at the moment, will be launched soon
Price:
$ 397.54
/ each
In Stock
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71911 CE/HCP4ADGA Bearing Product Overview & Core Advantages
The 71911 CE/HCP4ADGA is a super-precision angular contact ball bearing engineered for the most demanding high-performance applications. This metric series bearing is characterized by its extra light preload (Class A) and P4A tolerance class, ensuring exceptional running accuracy and rotational stability. Its primary advantage lies in its ability to handle combined loads (radial and axial) simultaneously with high precision, making it ideal for spindles requiring ultra-high speeds and minimal thermal growth. The use of a phenolic cage and ceramic balls contributes to lower friction, higher limiting speeds, and extended service life.
71911 CE/HCP4ADGA Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| CE | Contact angle of 15°. |
| HC | Hybrid Ceramic bearing (Ceramic balls with steel rings). |
| P4A | Super precision tolerance class, tighter than ABEC 7. |
| DGA | Universal Matchable (SU) designation. Two bearings are supplied as a matched set for preloaded arrangements. |
71911 CE/HCP4ADGA Bearing Structural Features & Performance Benefits
- Hybrid Ceramic Construction: The combination of chrome steel rings and silicon nitride (Si3N4) ceramic balls significantly reduces centrifugal forces, lowers operating temperature, and enables a higher limiting speed of 34,000 rpm. This construction also offers superior resistance to electrical arcing and operates effectively in marginal lubrication conditions.
- High Rigidity & Precision: Manufactured to P4A tolerance class with an extra light preload, this bearing provides maximum shaft rigidity and minimal runout, which is critical for maintaining accuracy in high-speed machining and precision equipment.
- Optimized Cage Design: The phenolic resin cage is lightweight and possesses excellent slip characteristics, contributing to smooth operation at high speeds and reduced friction losses.
- Universal Matching (SU): The bearings are supplied as a universally matchable pair. This allows for flexible mounting arrangements (DB, DF, DT) to achieve the required preload and stiffness without selective grinding, simplifying installation and inventory.
71911 CE/HCP4ADGA Bearing Typical Application Areas
This bearing is specifically designed for high-tech machinery where speed, precision, and reliability are paramount. Key applications include:
- High-Frequency Machine Tool Spindles
- Precision Grinding Spindles
- High-Speed Motors and Electric Spindles
- Aerospace auxiliary systems and instrumentation
- Medical Device rotating assemblies (e.g., dental handpieces)
