How many holes are you drilling? Is this an ongoing project or a one-time
fix?

If you've got thousands to do there is a better way... If you have 4 to do,
then go with the quick fix for sure!

Regards,
Joe Agro, Jr.
http://www.autodrill.com
http://www.multi-spindle-heads.com

V8013


"Steve Monroe" wrote in message
news:gt0pd.74555$EZ.71471@okepread07...
Gotta second Waynes advice to use a core drill. I've drilled many jet
engine
mounts out for bushings w/CDs. (4340, RC 43)
For lube, castor oil is my preferance.
Thanks,
Steve Monroe

"Wayne Cook" wrote in message
...
On Mon, 22 Nov 2004 19:09:56 GMT, "Tom Gardner"
wrote:

I have a bunch of presses with 5/8-11 holes that are in poor shape. We
pulled the first plate, 400 lbs - 2.5" thick and started drilling with
a
"D"
handle 1/2" electric drill. What a bitch! I ground the bit into a
spear
point on a 21/64" bit with a slight negative rake and it's still tough.
Two
guys and it still is very grabby and ary twisty. Short of a mag drill
or
putting the plate on the BP (can't get it there except by mussle)
There's
got to be a better way?


Four flute "Core Drill" is the best way to go. If it's a through
hole then a bridge reamer will work as well.
Wayne Cook
Shamrock, TX
http://members.dslextreme.com/users/waynecook