take a look at your large drill from the point end and take a small drill and look at the point end, notice how big the chisel is on the big drill compared to
small drill, you can thin these chisel edges on the large drill by thinning the web and grinding more heal clearance behind the cutting edge,
i have drilled 1/2 inch holes in steel with a cordless drill by properly addressing the cutting tool ,
i thin all the webs on my drills , stay away from split point drills however
they cut great at first but are delicate and chip out real fast expesially in handoperated tools
thanks chuck
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