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", ...
Hougen takes the difficulty out of enlarging existing holes using its new hole-enlarging pilots and Rotabroach ® cutters in portable magnetic drills. Enlarging an existing hole can be a time consuming ...
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