tested at a load of 26 pounds 130 psi and a velocity of 540 rpm 150 fpm in order to apply the correct load and speed a fixture was designed to fit in a bridgeport milling machine model j head series ii the fixture was spring loaded so that when compressed to the appropriate distance it applied a 26 pound load the milling machine was able to control the amount of compression and the speed at which the fixture operated see fig1 and 2 for schematic drawings of the rotating test specimen and the test fixture respectively the rotating test specimen was made of 1018 stainless steel with a finish of 8 12 u03bc inch a diagram of the specimen is shown below the specimen was exactly copied from the astm d 3702 test and is shown schematically in fig1 the test fixture was designed to hold the rotating test specimen and apply a constant load a schematic drawing of the fixture is shown in fig2 after the fixture was assembled it was placed on an instron u00ae universal material test machine model no 5567 instron corporation canton mass to determine the amount of compression required for 26 pounds of load fig3 is a graph of the load vs compression for the fixture each sample was tested in the following manner first the.