The ornamental design for a portable electric hammer drill, as shown and described.
FIG. 1 is a perspective view of top, front, and right side of a portable electric hammer drill showing our new design;
FIG. 2 is a front view thereof;
FIG. 3 is a rear view thereof;
FIG. 4 is a top view thereof;
FIG. 5 is a bottom view thereof;
FIG. 6 is a right side view thereof;
FIG. 7 is a left side view thereof;
FIG. 8 is an alternate perspective view thereof; and,
FIG. 9 is a perspective view of top, front, and right side of a portable electric hammer drill.
The broken line showing of a detachable battery and components is included for the purpose of illustrating the portable electric hammer drill and forms no part of the claimed design.