I am trying to machine some aluminum and it involves countersinking some
holes. I have tried a variety of 3/4" countersinks and so far they all suck
rocks. I tried the Vermont American single flute and it didn't want to cut.
I next tried a Bosch and it chattered so badly even in wood as to be
unusable. I have a Stanley 1/2" that works great but cannot find anyone that
carries Stanley countersinks. Any suggestions for a multi flute countersink?

"R. Pierce Butler" wrote in message
I am trying to machine some aluminum and it involves countersinking some
holes. I have tried a variety of 3/4" countersinks and so far they all
suck
rocks. I tried the Vermont American single flute and it didn't want to
cut.
I next tried a Bosch and it chattered so badly even in wood as to be
unusable. I have a Stanley 1/2" that works great but cannot find anyone
that
carries Stanley countersinks. Any suggestions for a multi flute
countersink?

http://www.leevalley.com/hardware/pa...=3,41306,41328

No longer available on LV, but you maybe able to find another source.
http://www.leevalley.com/wood/page.a...at=1,180,42240

Pilot essential, speed slow, work held fast, most any HSS design will
yield acceptable results, Ford better than others if chamfer precut
with piloted cutter.
Sample in the http://patwarner.com/new_pix.html link done this way in 2
stages.

http://www.patwarner.com (Routing & drilling)
_____________________________________________
R. Pierce Butler wrote:
I am trying to machine some aluminum and it involves countersinking some
holes. I have tried a variety of 3/4" countersinks and so far they all suck
rocks. I tried the Vermont American single flute and it didn't want to cut.
I next tried a Bosch and it chattered so badly even in wood as to be
unusable. I have a Stanley 1/2" that works great but cannot find anyone that
carries Stanley countersinks. Any suggestions for a multi flute countersink?

wrote in message
ups.com...
Pilot essential, speed slow, work held fast, most any HSS design will
yield acceptable results, Ford better than others if chamfer precut
with piloted cutter.
Sample in the http://patwarner.com/new_pix.html link done this way in 2
stages.

Agreed. Use oil or something similar as a lubricant in aluminum ALWAYS.
Aluminum becomes gummy on just about any tool at just about any speed sooner
or later.

Run the RPMs as slow as possible... "Play with" your downward pressure to
minimize chatter as needed. Pilot hole is absolutely necessary.

Ask in rec.crafts.metalworking for a more professional-soundign answer.

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

V8013-R

"Joe AutoDrill" wrote in
news:ZKnzg.1110$eG.309@trndny08:

wrote in message
ups.com...
Pilot essential, speed slow, work held fast, most any HSS design will
yield acceptable results, Ford better than others if chamfer precut
with piloted cutter.
Sample in the http://patwarner.com/new_pix.html link done this way in 2
stages.

Agreed. Use oil or something similar as a lubricant in aluminum ALWAYS.
Aluminum becomes gummy on just about any tool at just about any speed
sooner or later.

Run the RPMs as slow as possible... "Play with" your downward pressure
to minimize chatter as needed. Pilot hole is absolutely necessary.

Ask in rec.crafts.metalworking for a more professional-soundign answer.


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

V8013-R





I have used my Stanley 1/2" countersink in wood and brass with no issues.
Even starting to countersink a hole in soft pine using the Bosch CS
resulted in horrible amounts of chatter.

I have used my Stanley 1/2" countersink in wood and brass with no issues.
Even starting to countersink a hole in soft pine using the Bosch CS
resulted in horrible amounts of chatter.

What RPM are you running when this happens? Is the tool new or at least
sharp?

I don't have the RPMs for countersinks memorized, but I'd guess that if I
had to simply walk up to a drill press (you are using a drill press and not
a hand drill, right?) and make a counersunk hole, I'd run it at 1/2 the
speed of drilling to start.

Rough, ver conservative drilling RPMs can be found on my site at:
http://www.multi-drill.com/drill-speed-chart.htm

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

V8013-R

"Joe AutoDrill" wrote in
news:f0ozg.7909$Ju.7125@trndny09:

I have used my Stanley 1/2" countersink in wood and brass with no
issues. Even starting to countersink a hole in soft pine using the
Bosch CS resulted in horrible amounts of chatter.

What RPM are you running when this happens? Is the tool new or at least
sharp?

I don't have the RPMs for countersinks memorized, but I'd guess that if
I had to simply walk up to a drill press (you are using a drill press
and not a hand drill, right?) and make a counersunk hole, I'd run it at
1/2 the speed of drilling to start.

Rough, ver conservative drilling RPMs can be found on my site at:
http://www.multi-drill.com/drill-speed-chart.htm

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

V8013-R





I chucked the Bosch bit in my drill press at the lowest speed and it
chattered very badly. I decided to try a variable speed hand drill and no
matter what speed i tried, it chattered. Wood, Brass, it doesn't matter.
I think I will have to order a set to get a good countersink that I can use
in my drillpress. I wish I could find a Stanley 3/4" countersink. BTW,
I clamped the pieces to the drill press using c clamps.

I chucked the Bosch bit in my drill press at the lowest speed and it
chattered very badly. I decided to try a variable speed hand drill and no
matter what speed i tried, it chattered. Wood, Brass, it doesn't matter.
I think I will have to order a set to get a good countersink that I can
use
in my drillpress. I wish I could find a Stanley 3/4" countersink. BTW,
I clamped the pieces to the drill press using c clamps.

You are on the right track. Sounds like the Bosch bit may either be dull, a
specialty bit for something else, or simply doesn't like you.

Much success.

Also, final thought on RPM... Some folks countresink up to 3X the diameter
of the inside hole... In that case, you may want to drop the RPMs even
further... i.e. a 1/4" hole with a 1/2" ctrsink will have the ctrsink run
at 40-50% of the hole drilling rpm. But... a 1/4" hole with a 3/4" ctrsink
will run at 33% or less the speed of the drilling rpm, etc.

When in wood, it usually doesn't matter as much unless you want a clean hole
and/or no burnt wood. I haven't met a wood worker yet who uses coolant
other than air...

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

V8013-R

"R. Pierce Butler" wrote...
I am trying to machine some aluminum and it involves countersinking some
holes. I have tried a variety of 3/4" countersinks and so far they all
suck
rocks.


I've had good luck with this style countersink in wood, aluminum, and
plastic:

http://www.woodcraft.com/family.aspx?familyid=5154

--
Timothy Juvenal
www.tjwoodworking.com

R. Pierce Butler wrote:
I am trying to machine some aluminum and it involves countersinking some
holes. I have tried a variety of 3/4" countersinks and so far they all suck
rocks. I tried the Vermont American single flute and it didn't want to cut.
I next tried a Bosch and it chattered so badly even in wood as to be
unusable. I have a Stanley 1/2" that works great but cannot find anyone that
carries Stanley countersinks. Any suggestions for a multi flute countersink?
G'day,
I gather the holes are already drilled ??. If not, drill the countersink
first with a drill bit the right size for the screw heads, than drill
the hole through the centre for the screw shank. The smaller bit will
self centre in the larger, countersink holes.

Regards
John

ORDER A GOOD SINBLE FLUTE FROM http://www.kbctools.com/
I HAVE SEVERAL THAT I USE ON ALL METALS, WOOD AND PLASTIC. I USE THEM ON
THE DRILL PRESS, HAND HELD, AND SOMETIMES IN AN OLD HAND CRANK, BREAST
DRILL.
WORKS JUST AS GOOD WET OR DRY.
DON'T GET THE CHEAP ONE YOU WILL HAVE THE SAME RESULTS YOU ARE HAVING NOW.

GOOD LUCK
WOODWORM
"R. Pierce Butler" wrote in message
. 1...
I am trying to machine some aluminum and it involves countersinking some
holes. I have tried a variety of 3/4" countersinks and so far they all
suck
rocks. I tried the Vermont American single flute and it didn't want to
cut.
I next tried a Bosch and it chattered so badly even in wood as to be
unusable. I have a Stanley 1/2" that works great but cannot find anyone
that
carries Stanley countersinks. Any suggestions for a multi flute
countersink?

"Hambone Slim" wrote in
:

"R. Pierce Butler" wrote...
I am trying to machine some aluminum and it involves countersinking some
holes. I have tried a variety of 3/4" countersinks and so far they all
suck
rocks.


I've had good luck with this style countersink in wood, aluminum, and
plastic:

http://www.woodcraft.com/family.aspx?familyid=5154

--
Timothy Juvenal
www.tjwoodworking.com





Too small. I need a 3/4" countersink.

Upscale wrote:
"R. Pierce Butler" wrote in message
I am trying to machine some aluminum and it involves countersinking some
holes. I have tried a variety of 3/4" countersinks and so far they all
suck
rocks. I tried the Vermont American single flute and it didn't want to
cut.
I next tried a Bosch and it chattered so badly even in wood as to be
unusable. I have a Stanley 1/2" that works great but cannot find anyone
that
carries Stanley countersinks. Any suggestions for a multi flute
countersink?

http://www.leevalley.com/hardware/pa...=3,41306,41328

No longer available on LV, but you maybe able to find another source.
http://www.leevalley.com/wood/page.a...at=1,180,42240



Upscale has the pricier ones, and I have the cheaper model:

http://www.leevalley.com/hardware/pa...=3,41306,41328

That's the best c'sink I've ever used, and I'm sure it would cut nice
countersinks in aluminum too.

Tanus

--
This is not really a sig.

Tanus wrote in :

Upscale wrote:
"R. Pierce Butler" wrote in message
I am trying to machine some aluminum and it involves countersinking
some holes. I have tried a variety of 3/4" countersinks and so far
they all
suck
rocks. I tried the Vermont American single flute and it didn't want
to
cut.
I next tried a Bosch and it chattered so badly even in wood as to be
unusable. I have a Stanley 1/2" that works great but cannot find
anyone
that
carries Stanley countersinks. Any suggestions for a multi flute
countersink?

http://www.leevalley.com/hardware/pa...t=3,41306,4132
8

No longer available on LV, but you maybe able to find another source.
http://www.leevalley.com/wood/page.a...at=1,180,42240



Upscale has the pricier ones, and I have the cheaper model:

http://www.leevalley.com/hardware/pa...=3,41306,41328

That's the best c'sink I've ever used, and I'm sure it would cut nice
countersinks in aluminum too.

Tanus


not big enough.

R. Pierce Butler skrev:
"Hambone Slim" wrote in
:

"R. Pierce Butler" wrote...
I am trying to machine some aluminum and it involves countersinking some
holes. I have tried a variety of 3/4" countersinks and so far they all
suck
rocks.

I've had good luck with this style countersink in wood, aluminum, and
plastic:

http://www.woodcraft.com/family.aspx?familyid=5154

--
Timothy Juvenal
www.tjwoodworking.com





Too small. I need a 3/4" countersink.


http://www.leevalley.com/hardware/pa...=3,41306,41328

Name wrote in :

R. Pierce Butler skrev:
"Hambone Slim" wrote in
:

"R. Pierce Butler" wrote...
I am trying to machine some aluminum and it involves countersinking
some holes. I have tried a variety of 3/4" countersinks and so far
they all
suck
rocks.

I've had good luck with this style countersink in wood, aluminum, and
plastic:

http://www.woodcraft.com/family.aspx?familyid=5154

--
Timothy Juvenal
www.tjwoodworking.com





Too small. I need a 3/4" countersink.


http://www.leevalley.com/hardware/pa...=3,41306,41328


that could work. I will have to get one the next time I order from Lee
Valley.

"R. Pierce Butler" wrote...
I am trying to machine some aluminum and it involves countersinking some
holes. I have tried a variety of 3/4" countersinks and so far they all
suck


Countersinks are for sissies. Real men use a plug cutter and recess the
screws, welding the plug in place.

"Edwin Pawlowski" wrote in news:VKOzg.11217$Ju.7756@trndny09:


"R. Pierce Butler" wrote...
I am trying to machine some aluminum and it involves countersinking some
holes. I have tried a variety of 3/4" countersinks and so far they all
suck


Countersinks are for sissies. Real men use a plug cutter and recess the
screws, welding the plug in place.





Hard to do that with 3/8" thick aluminum plus make the screw removable.

Get a bigger one.

"R. Pierce Butler" wrote in message
...


not big enough.

R. Pierce Butler wrote:
Tanus wrote in :

Upscale wrote:
"R. Pierce Butler" wrote in message
I am trying to machine some aluminum and it involves countersinking
some holes. I have tried a variety of 3/4" countersinks and so far
they all
suck
rocks. I tried the Vermont American single flute and it didn't want
to
cut.
I next tried a Bosch and it chattered so badly even in wood as to be
unusable. I have a Stanley 1/2" that works great but cannot find
anyone
that
carries Stanley countersinks. Any suggestions for a multi flute
countersink?

http://www.leevalley.com/hardware/pa...t=3,41306,4132
8

No longer available on LV, but you maybe able to find another source.
http://www.leevalley.com/wood/page.a...at=1,180,42240


Upscale has the pricier ones, and I have the cheaper model:

http://www.leevalley.com/hardware/pa...=3,41306,41328

That's the best c'sink I've ever used, and I'm sure it would cut nice
countersinks in aluminum too.

Tanus


not big enough.


That's what an ex girlfriend once said.

Tanus

--
This is not really a sig.