Anthony wrote:

"Fred" wrote in
:


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?




A rattail file and a vice.


I second that -- it's slow, but it's much more controlled.

Next time verify the correct hole location as you drill. You should be
able to get to within 10 thou on a drillpress if you take your time
marking and center punching. You can even get a light centerpunch off
center and ease it over by careful double-punching or angled punching.
This is a skill I'm only now developing, after years of making slots to
correct poorly drilled holes.

--

Tim Wescott
Wescott Design Services
http://www.wescottdesign.com