The ornamental design for a shaft mounted saw, as shown and described.
FIG. 1 is a perspective view of the shaft mounted saw where the teeth of the saw and threads of the mount are in broken lines to show the environment of the invention, but form no part of the claimed design;
FIG. 2 is a top plan view of the shaft mounted saw shown in FIG. 1;
FIG. 3 is a left side elevation view of the shaft mounted saw shown in FIG. 1;
FIG. 4 is a bottom plan view of the shaft mounted saw shown in FIG. 1;
FIG. 5 is a right side elevation view of the shaft mounted saw shown in FIG. 1;
FIG. 6 is a back elevation view of the shaft mounted saw shown in FIG. 1;
FIG. 7 is a front elevation view of the shaft mounted saw shown in FIG. 1; and,
FIG. 8 is a reduced size perspective view of the shaft mounted saw shown in FIG. 1 positioned at the end of an arrow shaft.
The broken lines in FIGS. 1, 2, 3, 4, 5, 6 and 8 depict unclaimed environmental subject matter.