Abstract: An apparatus for effecting the combined simultaneous rotating and reciprocating movement of a die reconditioning tool mounted in a chuck which is secured to a rotating and reciprocating spindle. The reconditioning tool may be employed either in the rough grinding of a used die or may be employed to polish a die which may or may not have been previously subjected to a rough grinding operation. The improvement comprising the employment of a hub mounted for rotation with the main shaft of a lathe-type apparatus with the hub having a slot formed therein and a plate adjustably mounted in the said slot with a suitable linkage mechanism extending between the said plate and the reciprocating parts of the apparatus on which is mounted the said spindle whereby the length of reciprocating travel of the spindle and reconditioning tool mounted thereon may be varied by adjusting the plate in the slot formed in the aforesaid hub.