Twist drills do not make accurately sized or good finish holes; a reamer of some type is often used to cut the final size and finish. A reamer will not make the original hole; it will only enlarge a ...
DORMER PRAMET added a new option to its offering for high-end threading: the Dormer Shark E894 is a high-performance HSS-E thread forming tap suitable for both through and blind holes in a wide range ...