GB1340129A - Gauges - Google Patents

Abstract

1340129 Gauging splines THIOKOL CHEMICAL CORP 19 April 1971 [5 March 1970] 23171/71 Heading G1M A device for gauging the surface wear of a splined shaft comprises three gauge members 20, 21, 32 each mounted about a common axis and each having teeth 22, 23, 33 spaced circumfer. entially of the axis, the teeth on two of the members 20, 21 (which rotate relatively to indicate wear of a spline) being of different length to abut different surface portions of a spline and the third member 32 having teeth arranged to be resiliently urged away from the two members to engage surfaces of the splined shaft opposite said different surface portions. As shown, the three gauge members define a bore for the reception of a shaft having splines on its exterior surface and the gauge member 20 which is fixed to a housing section 27 by a screw 29 has teeth 22 shorter than those on the member 21 but of the same length as those on the member 32, the members 21, 32 being rotatable relative to the member 20. With the teeth in initial axial alignment the shaft to be tested is inserted in the bore and then by rotating a knob 38 to one of two positions either side of a central position the member 32 is rotatably urged by way of a slider 36 and a spring arrangement 38a, 38b to a position such that its teeth are in abutment with one side of the splines. The teeth on the other two members 20, 21 simultaneously take up positions in engagement with the other side of the splines and any relative rotation of the members 20, 21 as a consequence of spline wear is registered by a dial indicator 46 to indicate the amount of wear. A further embodiment comprises radially outwardly extending teeth on three gauge members for gauging the wear on the interior surface of a hollow shaft.