A device by which a spindle may be rotated and at the same time moved axially, as in the driving spindle of a bench drill in which the drill can travel to and from the work while spinning. It may take the form of a sleeve which does not itself rotate, but may be moved axially, usually having its outer surface machined with rack teeth to engage with the teeth of the feeding mechanism. The spindle is carried in bearings fixed inside the quill, and its driving end is provided with a long groove or keyway which engages with a corresponding key inside the bore of the pulley which rotates it.