71910 ACD/P4A
71900 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71910 ACD/P4A
Basic Information
System of measurement
Metric
Weight
0.13 kg
Tolerance class
P4 (ABEC-7)
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
50 mm
Bore diameter tolerance
-0.006mm to 0
Outside diameter
72 mm
Outside diameter tolerance
-0.007mm to 0
Width
12 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° to 110 °C
Radial dynamic load rating
2858 lbf
Radial static load rating
2205 lbf
Limiting speed
26 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Single
Preload
Available
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:
$ 83.48
/ each
In Stock
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71910 ACD/P4A Bearing Product Overview & Core Advantages
The 71910 ACD/P4A is a high-precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. This single-row bearing features a 25° contact angle and is supplied with a P4 (ABEC-7) tolerance class, making it ideal for high-speed spindles and precision machinery. Its key advantages include the ability to accommodate combined radial and axial loads simultaneously, superior running accuracy, and availability with preload for enhanced system stiffness.
71910 ACD/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71910 | Basic bearing series and size designation (50mm bore, 72mm OD, 12mm width). |
| AC | Angular Contact design with a 25° contact angle. |
| D | Signifies a high-precision version of the bearing. |
| /P4A | Indicates a P4 (ABEC-7) tolerance class and specific internal clearance/geometry for high-precision applications. |
71910 ACD/P4A Bearing Structural Features & Performance Benefits
- High Rigidity & Precision: The 25° contact angle and P4 tolerance class provide superior axial rigidity and exceptional running accuracy, essential for minimizing deflection in precision spindles.
- Optimized Load Capacity: Engineered to handle significant combined radial and axial loads, making it suitable for applications with complex loading conditions.
- High-Speed Performance: The lightweight phenolic resin cage ensures excellent dimensional stability and low friction, contributing to a high limiting speed of 26,000 rpm.
- Durable Construction: Manufactured from chrome steel for both rings and balls, offering high fatigue life and wear resistance. The open seal type allows for custom lubrication schemes to further optimize performance.
71910 ACD/P4A Bearing Typical Application Areas
This bearing is specifically engineered for high-performance applications, including:
- Machine Tool Spindles
- High-Frequency Motors
- Precision Grinding Equipment
- Robotic Drives and Actuators
- Medical and Dental Equipment
