71906 ACD/P4A
71900 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71906 ACD/P4A
Basic Information
System of measurement
Metric
Weight
0.048 kg
Tolerance class
P4 (ABEC-7)
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
30 mm
Bore diameter tolerance
-0.005mm to 0
Outside diameter
47 mm
Outside diameter tolerance
-0.006mm to 0
Width
9 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
4.762 mm
Ball quantity
20
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
1521 lbf
Radial static load rating
968 lbf
Limiting speed
45 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:
$ 74.03
/ each
In Stock
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71906 ACD/P4A Bearing Product Overview & Core Advantages
The 71906 ACD/P4A is a single-row angular contact ball bearing engineered for high-precision applications requiring exceptional rotational accuracy and rigidity. Designed to accommodate primarily axial loads in one direction, combined with moderate radial loads, its compact cross-section makes it ideal for space-constrained assemblies. Manufactured to a P4 (ABEC-7) tolerance class, this bearing delivers superior running accuracy, low noise, and vibration, ensuring reliable performance in demanding operational environments.
71906 ACD/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71906 | Basic bearing series and size designation (30mm bore, 47mm OD, 9mm width). |
| AC | Angular Contact design with a 25° contact angle for optimal axial load capacity. |
| D | Indicates a high-precision design with enhanced dimensional and running accuracy. |
| P4A | Specifies the tolerance class P4 (ABEC-7), denoting ultra-precision manufacturing standards for high-speed and high-accuracy applications. |
71906 ACD/P4A Bearing Structural Features & Performance Benefits
- High Rigidity and Precision: The single-row angular contact design with a 25° contact angle provides excellent axial rigidity and precise shaft guidance. Manufactured to P4 tolerance, it ensures minimal runout and superior rotational accuracy.
- Optimized Load Capacity: Engineered to support significant axial loads in one direction while simultaneously handling radial loads, making it suitable for combined loading scenarios.
- High-Speed Capability: The lightweight phenolic resin cage ensures stable operation and reduced centrifugal forces, contributing to a high limiting speed of 45,000 rpm. The open design facilitates efficient lubrication management.
- Premium Material Construction: Rings and balls made from high-grade chrome steel provide high fatigue life and durability, while the phenolic cage offers strength and smooth operation at high speeds.
71906 ACD/P4A Bearing Typical Application Areas
This precision angular contact bearing is ideally suited for applications demanding high speed, accuracy, and rigidity, including:
- Machine Tool Spindles
- High-Speed Robotic Drives
- Precision Grinding Spindles
- Medical and Dental Handpieces
- Aerospace Actuators and Control Systems
