[Technical Information] How to detect looseness? (Junker Test)

Continuously measure changes in axial force! We will explain the principles of the Junker test in detail!

The Junker axial perpendicular vibration test is a test for the loosening of screws caused by repeated loads in the axial perpendicular direction. The principle of the Junker test is illustrated in the left diagram. By applying repeated forces in the perpendicular direction to the axis of the screw, a loosening torque is generated, and the changes in axial force are continuously measured. In actual usage scenarios of screws and bolts, vibrations occur regularly and are a primary cause of loosening. The Junker testing machine artificially generates vibrations in the axial perpendicular direction, which are prone to cause a decrease in axial force, allowing for observation and verification. *For more details, please refer to the PDF materials or feel free to contact us.*

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