There are three tool options to consider when drilling large-diameter holes in thick steel: twist drill bits, hole saws and annular cutters. 1. Twist drill bits. Especially in steel thicker than ¼", ...
This HSS Rotabroach annular cutter is built for the job. Designed for use with magnetic drills, it cuts fast and leaves a smooth finish. Made in the UK by JEI under the Turbo Steel brand. It’s a ...
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