The ornamental design for a segmenttip for a grinding wheel, as shown and described.
FIG. 1 is a perspective view of the segment tip for a grinding wheel of the present invention;
FIG. 2 is a front view the segment tip for a grinding wheel shown in FIG. 1;
FIG. 3 is a rear view the segment tip for a grinding wheel shown in FIG. 1;
FIG. 4 is left side view the segment tip for a grinding wheel shown in FIG. 1;
FIG. 5 is a right side view the segment tip for a grinding wheel shown in FIG. 1;
FIG. 6 is a top view the segment tip for a grinding wheel shown in FIG. 1;
FIG. 7 is a bottom view the segment tip for a grinding wheel shown in FIG. 1; and,
FIG. 8 is a perspective view of the segment tip for a grinding wheel shown in FIG. 1 arranged on a grinding wheel with the grinding wheel and other segment tips shown in broken lines to illustrate the environment related to the claimed design.