With a 25 hp motor geared down to 8 rpm and a # 6 morse taper, I would
think it would be able to use bigger drills. How do you come up with
4 inches?

The same site has another radial arm drill press with a 15 hp motor
and a #5 morse taper and says it will drill up to 4.5 in cast iron.

Both of them are too big to go into my basement.

Typically, the MT shank isn't rated for making a hole in mild steel much
larger than about 115% of it's maximum diameter.

That's not a solid rule, but it's somewhat of a standard many go by.

Regards,
Joe Agro, Jr.
(800) 871-5022 x113
01.908.542.0244
Flagship Site: http://www.Drill-HQ.com
Automatic / Pneumatic Drills: http://www.AutoDrill.com
Multiple Spindle Drills: http://www.Multi-Drill.com
Production Tapping: http://Production-Tapping-Equipment.com/
VIDEOS: http://www.youtube.com/user/AutoDrill
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TWITTER: http://twitter.com/AutoDrill


V8013-R

There's a twist-drill manufacturer with their head office in Seoul
Korea who has a scaled-up twist drill sculpture in front of their
building. Maybe 20-30' high and 3' in diameter? ;-)

If someone can make it work on a drill press, I'll count that as the winner.

...No Balsa wood drilling either.

Regards,
Joe Agro, Jr.
(800) 871-5022 x113
01.908.542.0244
Flagship Site: http://www.Drill-HQ.com
Automatic / Pneumatic Drills: http://www.AutoDrill.com
Multiple Spindle Drills: http://www.Multi-Drill.com
Production Tapping: http://Production-Tapping-Equipment.com/
VIDEOS: http://www.youtube.com/user/AutoDrill
FACEBOOK: http://www.facebook.com/AutoDrill
TWITTER: http://twitter.com/AutoDrill


V8013-R

12"

Would love to see it. What shank does a 12" drill tool have? The largest
MT is #7, eh?
--


Regards,
Joe Agro, Jr.
(800) 871-5022 x113
01.908.542.0244
Flagship Site: http://www.Drill-HQ.com
Automatic / Pneumatic Drills: http://www.AutoDrill.com
Multiple Spindle Drills: http://www.Multi-Drill.com
Production Tapping: http://Production-Tapping-Equipment.com/
VIDEOS: http://www.youtube.com/user/AutoDrill
FACEBOOK: http://www.facebook.com/AutoDrill
TWITTER: http://twitter.com/AutoDrill


V8013-R

Some where, I've got an installer's bit, which makes 1/2
holes, and the shaft is 4 feet long. I could have got 6 foot
long, and probably ought to have.

Largest diameter I have is 1/2 inch, though I've seen 3/4.

--
Christopher A. Young
Learn more about Jesus
www.lds.org
..


"Joe AutoDrill" wrote in message
...
So my son asks me what the largest twist drill available
is... I told him
10 feet because they could make one for him.

But that got me to thinking... With a Morse Taper #4 or
larger (they go to
Morse #7, right?), what is the largest twist drill you guys
have seen or
actually own?

We're talking standard drills, not annular cutters or end
mills, etc.

Regards,
Joe Agro, Jr.
(800) 871-5022 x113
01.908.542.0244
Flagship Site: http://www.Drill-HQ.com
Automatic / Pneumatic Drills: http://www.AutoDrill.com
Multiple Spindle Drills: http://www.Multi-Drill.com
Production Tapping: http://Production-Tapping-Equipment.com/
VIDEOS: http://www.youtube.com/user/AutoDrill
FACEBOOK: http://www.facebook.com/AutoDrill
TWITTER: http://twitter.com/AutoDrill


V8013-R