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

Continuously measure changes in axial force! We will explain the principles of the Juncker 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 perpendicular to the axis of the screw, it generates a loosening torque, allowing for continuous measurement of changes in axial force. In actual usage scenarios of screws and bolts, vibrations occur regularly and are a primary cause of loosening. The Junker test machine artificially generates vibrations in the axial perpendicular direction, which are prone to cause a decrease in axial force, for observation and verification. *For more details, please refer to the PDF document or feel free to contact us.*

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