This Hendey lathe attachment was for enabling toolmakers to secure carriage spacing accurately to 0.0001″. The main casting is bolted to the front right wing of carriage. The nut is fitted to bracket casting which is clamped to front Vee of lathe bed. The disc hand wheel is keyed to a gear shaft, and has a roller handle. The dials for 12″-20″ lathes are 6″ dia and for 24″ they are 7″ dia. All are graduated in tenths of thousandths of an inch
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