Answer: hobber

AnswerCrossword Clue
hobbermilling cutter for gear and sprocket teeth, splines, threads, etc., having helically arranged teeth and fed across the work as the work is rotated
hobberprojection or shelf at the back or side of a fireplace, used for keeping food warm
hobberto cut with a hob
hobberone that hobs (to furnish with hobnails)