Fred wrote:
Drilling 1/4" holes on a 1/8" thick mild steel plate on a floor drill press
but a few of the holes were off. Try to corrected it on my drill press to
widen the holes with the same 1/4" drill bit the bid just deflected from
side pressure. I do not want to use a larger bit since it will make the
holes too large. I then try to corrected it with a Dremel with one of those
small cylindrical grinding stone attached to a 1/8" shaft to get in the 1/4"
hole but the grinding stone only lasted about 10 seconds before
disintegrated. So what is the right tool/method just to widen those holes on
one side?



If what you have in the way of tools is Dremel-ish, try a carbide burr
in the smallest size you can lay your hands upon; no bigger than 1/8".
Your grinding stone was probably too large relative to the hole,
resulting in far too much contact area around its diameter -- CRUNCH!

With the small burr, you might try a piece of steel scrap (perhaps even
sheet metal) with a 1/4" hole in it above and aligned with where you
want the hole to be. This will help you keep the @#$#$^)(&*()!@ burr
where you want it.

--
Fred R
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