For all micromot devices preset for it particularly beneficial for all tasks with different shafts clamping range from 03 32 mm for proxxon micromot machines of fbs 240e fbs 12ef types driller and milling machine 50ef bending shaft 110bfdrill chuck or colletdrill chucks provide more convenience to quickly change the tools when working with shafts of varying diameters eg hss drills as per din 338 however because of their technical setup they have a few drawbacks compared to