71910 ACD/HCP4ADT
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
71910 ACD/HCP4ADT
Basic Information
System of measurement
Metric
Weight
0.24 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
50 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
72 mm
Outside diameter tolerance
-0.004mm to 0
Width
24 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
6.35 mm
Ball quantity
25
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
4680 lbf
Radial static load rating
4410 lbf
Limiting speed
46 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
Price:
$ 155.06
/ each
In Stock
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71910 ACD/HCP4ADT Bearing Product Overview & Core Advantages
The 71910 ACD/HCP4ADT is a precision angular contact ball bearing supplied as a duplex tandem (DT) matched set. Engineered for high-speed operation and exceptional rigidity, this bearing is designed to accommodate heavy axial loads in one direction. Its construction, featuring a phenolic cage and ceramic balls, ensures low friction, minimal heat generation, and superior performance in demanding applications requiring P4A super-precision tolerances.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| 71910 | Basic bearing series and size designation (50mm bore, 72mm OD). |
| AC | Angular Contact design with a 25° contact angle. |
| D | Signifies the bearing is part of a Duplex (matched) set. |
| HC | Indicates the use of Hybrid Ceramic balls (Silicon Nitride). |
| P4A | Denotes super-precision tolerance class, exceeding ABEC 7/ISO P4. |
| DT | Specifies the Duplex Tandem arrangement of the matched set. |
71910 ACD/HCP4ADT Bearing Structural Features & Performance Benefits
- High Rigidity & Axial Load Capacity: The duplex tandem (DT) arrangement pairs two bearings to significantly increase stiffness and capacity for unidirectional axial loads, making it ideal for preloaded systems.
- Superior High-Speed Performance: The combination of a lightweight phenolic resin cage and low-density ceramic balls reduces centrifugal forces, enabling stable operation at the high limiting speed of 46,000 rpm.
- Precision & Accuracy: Manufactured to P4A tolerance class, this bearing ensures minimal runout and vibration for applications requiring extreme rotational accuracy.
- Reduced Friction & Heat Generation: Hybrid ceramic construction offers lower thermal expansion and superior lubrication retention compared to all-steel designs, extending service life.
- Preload Availability: The bearing set is supplied ready for preload, eliminating internal clearance to maximize system rigidity and positioning accuracy from installation.
71910 ACD/HCP4ADT Bearing Typical Application Areas
This high-precision, high-speed bearing is ideally suited for:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling and routing equipment.
- High-Frequency Motors: Spindles for electric vehicles and industrial automation.
- Turbochargers and other high-RPM auxiliary equipment.
