The ornamental design for a portableelectricgrinder, as shown and described.
FIG. 1 is a front perspective view of a portable electric grinder in accordance with our new design;
FIG. 2 is a rear perspective view thereof;
FIG. 3 is a front elevational view thereof;
FIG. 4 is a rear elevational view thereof;
FIG. 5 is a top plan view thereof;
FIG. 6 is a bottom plan view thereof;
FIG. 7 is a right side elevational view thereof;
FIG. 8 is a left side elevational view thereof; and,
FIG. 9 is a front perspective view of the portable electric grinder in a state of use in which a battery is attached to the portable electric grinder.
The broken lines illustrate environmental subject matter or unclaimed portions of the portable electric grinder, and form no part of the claimed design.