Klauss k-1311, Pro-Craft 2300, Einhell, Stern AG230D, Grinder 2700W electric motor armature with winding diameter 48.5 (length 68), distance between bearing positions is ~161, total length 200 mm, thread on the shank 8 mm, bearings are put on 9 and 12 mm, pinion gear fixation through a two side cuts 10 mm width. Compatible with many different angle grinders