IMMS were requested to perform the comprehensive testing of two mill roller shafts of one of the world's biggest sugar mills owned by Wang Kanai Group located in the northeast of Thailand. The shafts, which were 6 meter long, almost 1 meter wide in diameter, and 32 tons in weight, were suspected of having some internal cracks.

             Acoustic Emission and Ultrasonic techniques were selected. The data obtained from the tests showed several locations of internal fatigue cracks as assumed, and the visual observation had confirmed the test results.
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