Typically, I tell people who *need* to drill aluminum dry to run at about
70% of the RPm shown on my charts
(http://www.multi-drill.com/drill-speed-chart.htm).

In other words, a 1/2" hole in aluminum run dry would be run at around 1000
RPM rather than 1500 or so...

We are relatively conservative with our numbers because when it comes to
drilling, most people don't need CNC-type speed. ...So don't slam me for
being so slow and out of touch!

I'm wondering if there is a rule of thumb any of you follow for such
procedures?

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

V8013-R

On 2010-09-02, Joe AutoDrill wrote:
Typically, I tell people who *need* to drill aluminum dry to run at about
70% of the RPm shown on my charts
(http://www.multi-drill.com/drill-speed-chart.htm).

Great chart, thanks for posting the link.

In other words, a 1/2" hole in aluminum run dry would be run at around 1000
RPM rather than 1500 or so...

We are relatively conservative with our numbers because when it comes to
drilling, most people don't need CNC-type speed. ...So don't slam me for
being so slow and out of touch!

I'm wondering if there is a rule of thumb any of you follow for such
procedures?

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

V8013-R

Great chart, thanks for posting the link.

My pleasure. It's conservative for the most part and based on HSS tooling
and typical coolant-in-use situations for the most part.

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

V8013-R

On Sep 2, 3:51*pm, "Joe AutoDrill" wrote:
Typically, I tell people who *need* to drill aluminum dry to run at about
70% of the RPm shown on my charts
(http://www.multi-drill.com/drill-speed-chart.htm).
...

Thanks.

Does the point style affect the thrust much?

jsw

"Jim Wilkins" wrote in message
...
On Sep 2, 3:51 pm, "Joe AutoDrill" wrote:
Typically, I tell people who *need* to drill aluminum dry to run at about
70% of the RPm shown on my charts
(http://www.multi-drill.com/drill-speed-chart.htm).
...

Thanks.

Does the point style affect the thrust much?

Good question. It does on larger holes - sorta... I challenge anyone to
start a 3/4" diameter drill in a flat plate of steel without split point
tooling and a smaller drill press.

I can't answer whether it changes the process as the drill moves through the
material as we use more thrust and a HydroSpeed feed control on our units to
keep teh feed rate stable. It's like drilling with a CNC that can generate
5,000 lbs. thrust... It can drill a 1/8" hole no problem, but there is
something holding back all that potential.

Imagine this... My drill can create 1000 # of thrust but I set it so that
it can not move forward more than 0.004" per rotation. Thus, I can drill a
1/4" hole in soft plastic with my drill running full tilt thrust... ...Or I
can turn it down to around 100# of thrust and stop abusing the HydroSpeed.

--


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

V8013-R

On 2010-09-03, Joe AutoDrill wrote:
"Jim Wilkins" wrote in message
...
On Sep 2, 3:51 pm, "Joe AutoDrill" wrote:
Typically, I tell people who *need* to drill aluminum dry to run at about
70% of the RPm shown on my charts
(http://www.multi-drill.com/drill-speed-chart.htm).
...

Thanks.

Does the point style affect the thrust much?

Good question. It does on larger holes - sorta... I challenge anyone to
start a 3/4" diameter drill in a flat plate of steel without split point
tooling and a smaller drill press.

I can't answer whether it changes the process as the drill moves through the
material as we use more thrust and a HydroSpeed feed control on our units to
keep teh feed rate stable. It's like drilling with a CNC that can generate
5,000 lbs. thrust... It can drill a 1/8" hole no problem, but there is
something holding back all that potential.

Imagine this... My drill can create 1000 # of thrust but I set it so that
it can not move forward more than 0.004" per rotation. Thus, I can drill a
1/4" hole in soft plastic with my drill running full tilt thrust... ...Or I
can turn it down to around 100# of thrust and stop abusing the HydroSpeed.


Does your drill resist being grabed and led into the hole?

i

Does your drill resist being grabed and led into the hole?

Does it resist the pull of the tooling when the tooling starts to act like a
screw instead of a drill? Yes. Quite well actually. It also resists the
surge that happens at break through so as to minimize the burr as much as
possible.

Does it resist finding the center of an existing hole? I don't think this is
what you meant to ask, but hey... One never knows! This is essentially the
same question as "will it hold center when drilling on the curved surface of
a round tube?" To some degree, but that's what drill bushings are for in
high volume job applications.

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

V8013-R