The ornamental design for a body for an aircut-off tool, as shown and described.
FIG. 1 is a perspective view of a body for an air cut-off tool, showing my new design;
FIG. 2 is a front view thereof;
FIG. 3 is a rear view thereof;
FIG. 4 is a left view thereof;
FIG. 5 is a right view thereof;
FIG. 6 is top view thereof;
FIG. 7 is a bottom view thereof; and,
FIG. 8 is an operational perspective view showing the claimed design in FIG. 1, wherein the broken lines are shown for illustrative purpose only and form no part of the claimed design.