Chucked drilling tool locator comprises larger diameter rollers placed in chuck cylinder to bear increasingly on centraly positioned drill tool as chuck speed increases.

摘要

Rollers (1) of slightly larger diameter are carried in a chuck cylinder (2) so as to locate the centraly inserted drill tool (4) by pressure when the cylinder (2) rotates. The endfaces of the rollers terminate in pins which are guided in the cylinder covers to prevent the rollers falling out.