The Murphy Builders Site

I have read that the optimium speed for drilling small holes in thin aluminium is something on the order of 30k rpm which is well beyond the drills that I have seen There is a 15,000 rpm drill made by US Industrial availible as well as a 4500rpm model. If I get the 15,000 rpm model, will it have enough torque for my needs or will I want a second air drill (I have numerous electric and cordless drills)? What do you guys use and recommend? Which drills have the best trigger control? I will be building a Moose (fast build)..

Mike
MU-2



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Hi Mike !

Gee, our idea of optimum would be about 6,000 rpm -
that 4,500 rpm model sounds just fine !! :-)

Those speedy Dremels are handy in tight spots, also
great with the little sanding drums ....
....bobp

----------------------------orig.-------------------
On Friday 27 February 2004 08:51 pm, you wrote:

I have read that the optimium speed for drilling small holes in thin

aluminium is something on the order of 30k rpm which is well beyond the
drills that I have seen There is a 15,000 rpm drill made by US Industrial
availible as well as a 4500rpm model. If I get the 15,000 rpm model, will it
have enough torque for my needs or will I want a second air drill (I have
numerous electric and cordless drills)? What do you guys use and recommend?
Which drills have the best trigger control? I will be building a Moose (fast
build)..

Mike
MU-2



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When I use my 25k angle die grinder, it is too fast to control easily.
It likes to skate and it will quickly cut sideways like an end mill if
you are not careful.

My 3k drill is fine and better than my 2600 rpm one but I can see 4500
being a bit better still. More important though is a teasing trigger so
you can start it slowly. The on/off trigger ones are difficult to
control when starting. Anything that spins at 30k is not likely to start
up nice and gently.

Ken

Bob Patterson wrote:

Hi Mike !

Gee, our idea of optimum would be about 6,000 rpm -
that 4,500 rpm model sounds just fine !! :-)

Those speedy Dremels are handy in tight spots, also
great with the little sanding drums ....
....bobp

----------------------------orig.-------------------
On Friday 27 February 2004 08:51 pm, you wrote:

I have read that the optimium speed for drilling small holes in thin

aluminium is something on the order of 30k rpm which is well beyond the
drills that I have seen There is a 15,000 rpm drill made by US Industrial
availible as well as a 4500rpm model. If I get the 15,000 rpm model, will it
have enough torque for my needs or will I want a second air drill (I have
numerous electric and cordless drills)? What do you guys use and recommend?
Which drills have the best trigger control? I will be building a Moose (fast
build)..

Mike
MU-2

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I'll play my air drill tune again. My vote is for the Sioux brand 3600
rpm 1/4" chuck that sells for about $215. We bought one and after my
wife used it once I had to buy another so I would have one to use. The
teasing trigger is tops and it has plenty of power at 90 psi to twist a
1/4" drill. Also suggest a lightweight air hose with miniature fittings
available from Avery for much reduced fatigue.
Ralph Baker
Elite 624E
Too cold to work in the hangar so tomorrow it's off to Daytona
motorcycle speedweek.


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Hello Mike,

I am not a experienced builder, but I use a "American Roadcraft RC4000 1/4"
drill" that run at 2800 rpm. Just 1.3 pound! I think that faster may be
better but you have to be careful, it will be very easy to "ovalised" the
hole.
Jean
Rebel 747R
----- Original Message -----
From: "Mike Rapoport" <rapopor1@ix.netcom.com>
To: <murphy-rebel@dcsol.com>
Sent: Friday, February 27, 2004 8:51 PM
Subject: Air Drills

I have read that the optimium speed for drilling small holes in thin

aluminium is something on the order of 30k rpm which is well beyond the
drills that I have seen There is a 15,000 rpm drill made by US Industrial
availible as well as a 4500rpm model. If I get the 15,000 rpm model, will
it have enough torque for my needs or will I want a second air drill (I have
numerous electric and cordless drills)? What do you guys use and recommend?
Which drills have the best trigger control? I will be building a Moose
(fast build)..

Mike
MU-2

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