Guard Tube for Supporting a Drive Shaft of a Hand-Guided Power Tool

The invention relates to a guard tube (4) which is provided with an inner bearing tube (14) for supporting a drive shaft (10) of a hand-guided power tool. The bearing tube (14) is provided with a central bearing sleeve with supporting elements (21,22,23,24). The guard tube (4) has a tube cross section which is different from a circle, wherein the inner contour (18) of the tube cross section (17) has first circumferential edge section (51,52,53,54) with a least distance (rmin) relative to the center (Z) of the tube cross section (17) and second circumferential edge section (61,62,63,64) with a maximal distance (rmax) relative to the center (Z) of the bearing sleeve (17). At least one supporting element (21,22,23,24) abut against the inner contour (18) of the tube cross section (17) by means of abutting surfaces (37,39), wherein the distance (r) of the abutting surfaces (37,39) relative to the center (Z) is higher than the least distance (rmin) of the first circumferential edge section (51,52,53,54) relative to