71800 ACD/P4DGA
71800 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71800 ACD/P4DGA
Basic Information
System of measurement
Metric
Weight
0.01 kg
Tolerance class
P4
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
10 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
19 mm
Outside diameter tolerance
-0.004mm to 0
Width
10 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
2.381 mm
Ball quantity
12
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
655 lbf
Radial static load rating
418 lbf
Limiting speed
95 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
Chrome Steel
Cage material
Phenolic
Technical Drawings
No drawings available at the moment, will be launched soon
Price:
$ 78.31
/ each
In Stock
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71800 ACD/P4DGA Bearing Product Overview & Core Advantages
The 71800 ACD/P4DGA is a super-precision angular contact ball bearing designed for the most demanding high-speed and high-accuracy applications. As part of a universally matchable (SU) pair, it excels in configurations requiring exceptional rotational accuracy and rigidity. Its defining characteristics include an extra light preload (Class A) and a P4 tolerance class, ensuring minimal runout and smooth operation under high rotational speeds. This bearing is pre-lubricated and engineered to handle combined loads, offering a reliable solution for sophisticated machinery.
71800 ACD/P4DGA Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning | Significance & Benefit |
|---|---|---|
| ACD | 25° Contact Angle | Optimized for carrying significant axial loads in one direction while supporting radial loads. |
| P4 | Tolerance Class P4 | Denotes high precision with tight dimensional and running accuracy tolerances for superior performance. |
| DGA | Phenolic (Polyamide) Cage, Universal Match | The lightweight phenolic cage contributes to lower friction and higher limiting speeds. The "Universal Match" designation allows for flexible pairing in various preload configurations. |
71800 ACD/P4DGA Bearing Structural Features & Performance Benefits
- High Rigidity and Precision: Manufactured to P4 tolerance class standards, this bearing ensures minimal internal clearance and high running accuracy, which is critical for applications requiring extreme positional stability.
- Superior High-Speed Performance: The combination of a lightweight phenolic cage, a 25° contact angle, and precision grinding allows for a very high limiting speed of 95,000 rpm, making it ideal for high-spindle applications.
- Optimized Load Capacity: The 25° contact angle is engineered to efficiently support combined loads, providing excellent performance where substantial axial and radial forces are present simultaneously.
- Universal Matchability (SU): This feature allows two bearings to be mounted in a face-to-face, back-to-back, or tandem arrangement without selective matching, simplifying installation and providing design flexibility for achieving specific preload and stiffness characteristics.
71800 ACD/P4DGA Bearing Typical Application Areas
This super-precision bearing is indispensable in equipment where high rotational speed and accuracy are paramount. Key application areas include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Instruments: Measuring and testing equipment.
- High-Frequency Motors and Spindles: Used in PCB drilling and semiconductor manufacturing equipment.
- Aerospace Gyroscopes and Navigation Systems: Where uncompromising accuracy is required.
