Rotating Fatigue

The Rotating Fatigue Machine from Matrix is a precision-engineered teaching tool designed to demonstrate the principles of material fatigue under cyclic loading conditions. It simulates sinusoidal bending stress at selectable speeds of 1400 or 5600 RPM, achieved through a 2800 RPM motor coupled via a gear and pulley system.

Test specimens are mounted using precision keyless chucks and subjected to cantilever loading, applied through a screw jack mechanism integrated with a load cell. This allows accurate force application and measurement. A digital display provides real-time readouts of both the applied force and the number of loading cycles, with reset functions available prior to each test.

The system automatically stops upon specimen failure using a microswitch, ensuring the final cycle count is preserved on the display. For operator safety, all rotating components are fully enclosed within a protective guard.

A manual and curriculum accompany the equipment, covering setup, operation, experimental procedures, example results, and the theoretical background.

Supplied as standard are a set of specially machined steel specimens with a nominal 4 mm neck diameter and all necessary tools for specimen replacement.

 Learning Objectives:

• Make an introductory study of fatigue using a Wohler rotating​
• Fatigue apparatus, including the time to failure caused by various​ stress levels and materials​
• Introducing students to S-N curves​
• Material specification on fatigue limits​
• Specimen geometry on fatigue limit