Wohler s fatigue testing machine a spindle in the center of the machine is supported by two bearing blocks and rotated at approximately 15 rpm. Two axles were mounted to both ends of the rotating spindle and bending forces were applied to the axles thru a spring mechanism located at both ends of the machine. Based on wohler s design it uses a motor to rotate a circular cantilever specimen with a load at its free end.
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