The Diamond Products CB215 hand-held drill motor is a lightweight drill for coring up to 3-in. diameter holes by hand or up to 6 in. mounted on a core rig. This motor has a three-speed gear box with ...
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", ...
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