Slotting machines

A machine for machining blind-ended slots longitudinally disposed within the bore of a sleeve, comprising a work holding spindle indexable about a rotational axis, said spindle incorporating a work holding chuck for holding said sleeve, a cutting tool mounted on a cutting spindle, the axis of said cutting spindle being offset from and at right angles to the rotational axis of said work holding spindle, means of supporting said cutting spindle for angular reciprocation, infeed means to permit said cutting tool to execute a succession of progressively deeper cutting and subsequent return strokes in relation to said bore of said sleeve, whereby after a series of indexations of said work holding spindle, said blind-ended slots are machined in a sleeve characterized in the provision of means slideably supporting said work holding spindle for movement along an axis parallel to said rotational axis of said work holding spindle and, means acting to disable said infeed means after said machining of all said slots is completed, and means to slide said work holding spindle axially relative to said cutting spindle a distance such that said cutting tool is radially and axially clear of said bore.