Scored 10 annular cutters at a garage sale for $5.00. They all look brand new. They range from 7/16" diameter to 1 inch. Cutting depth is 2 inches..

What is the purpose of these cutters. If I put one in my milling machine and push it through, say, 1/2" plate, the end result will be the same had I used a solid milling cutter. Why would I ever want an annular groove in a piece of metal other than for an "O" ring?

Please enlighten me. I realize that mag drills use these, but don't know why.

Ivan Vegvary

On Sat, 31 Aug 2013 16:50:39 -0700 (PDT), Ivan Vegvary
wrote:

Scored 10 annular cutters at a garage sale for $5.00. They all look brand new. They range from 7/16" diameter to 1 inch. Cutting depth is 2 inches.

What is the purpose of these cutters. If I put one in my milling machine and push it through, say, 1/2" plate, the end result will be the same had I used a solid milling cutter. Why would I ever want an annular groove in a piece of metal other than for an "O" ring?

Please enlighten me. I realize that mag drills use these, but don't know why.

Ivan Vegvary

Less force required for drilling. Better lubrication. With a center
pin, better centering. Better chip removal. Less runout and lobing.
Fewer burrs.

Good ones are great tools. Poor ones will drive you crazy.

--
Ed Huntress

On Saturday, August 31, 2013 4:58:27 PM UTC-7, Ed Huntress wrote:
On Sat, 31 Aug 2013 16:50:39 -0700 (PDT), Ivan Vegvary

wrote:



Scored 10 annular cutters at a garage sale for $5.00. They all look brand new. They range from 7/16" diameter to 1 inch. Cutting depth is 2 inches.



What is the purpose of these cutters. If I put one in my milling machine and push it through, say, 1/2" plate, the end result will be the same had I used a solid milling cutter. Why would I ever want an annular groove in a piece of metal other than for an "O" ring?



Please enlighten me. I realize that mag drills use these, but don't know why.



Ivan Vegvary



Less force required for drilling. Better lubrication. With a center

pin, better centering. Better chip removal. Less runout and lobing.

Fewer burrs.



Good ones are great tools. Poor ones will drive you crazy.



--

Ed Huntress

Thanks Ed, that explains it.

Ivan Vegvary

On Saturday, August 31, 2013 4:50:39 PM UTC-7, Ivan Vegvary wrote:
Scored 10 annular cutters at a garage sale for $5.00. They all look brand new. They range from 7/16" diameter to 1 inch. Cutting depth is 2 inches.



What is the purpose of these cutters. If I put one in my milling machine and push it through, say, 1/2" plate, the end result will be the same had I used a solid milling cutter. Why would I ever want an annular groove in a piece of metal other than for an "O" ring?



Please enlighten me. I realize that mag drills use these, but don't know why.



Ivan Vegvary

"Ivan Vegvary"
wrote in message
Scored 10 annular cutters at a garage sale for
$5.00. They all look brand new. They range from
7/16" diameter to 1 inch. Cutting depth is 2
inches.

What is the purpose of these cutters. If I put
one in my milling machine and push it through,
say, 1/2" plate, the end result will be the same
had I used a solid milling cutter. Why would I
ever want an annular groove in a piece of metal
other than for an "O" ring?

Please enlighten me. I realize that mag drills
use these, but don't know why.

Ivan Vegvary


To produce large holes in thin plate 'in
postition' with a mag drill.
Like 1.5 dia in 0.188 plate

On Sat, 31 Aug 2013 20:17:49 -0400, "Phil Kangas"
wrote:


"Ivan Vegvary"
wrote in message
Scored 10 annular cutters at a garage sale for
$5.00. They all look brand new. They range from
7/16" diameter to 1 inch. Cutting depth is 2
inches.

What is the purpose of these cutters. If I put
one in my milling machine and push it through,
say, 1/2" plate, the end result will be the same
had I used a solid milling cutter. Why would I
ever want an annular groove in a piece of metal
other than for an "O" ring?

Please enlighten me. I realize that mag drills
use these, but don't know why.

Ivan Vegvary


To produce large holes in thin plate 'in
postition' with a mag drill.
Like 1.5 dia in 0.188 plate

I should have pointed out that they're used mostly in fabrication
drilling, but I've seen them on gang-type drilling machines for
structural sections as well as plate, and for plate up to an inch or
so thick.

But they are mostly products for the portable magnetic drill business.

--
Ed Huntress

On 2013-08-31, Ivan Vegvary wrote:

Scored 10 annular cutters at a garage sale for $5.00. They all look
brand new. They range from 7/16" diameter to 1 inch. Cutting depth is
2 inches.

Nice!

What is the purpose of these cutters. If I put one in my milling
machine and push it through, say, 1/2" plate, the end result will be the
same had I used a solid milling cutter. Why would I ever want an
annular groove in a piece of metal other than for an "O" ring?

Please enlighten me. I realize that mag drills use these, but don't
know why.

Because with less cutting area, it takes less force to push
though metal while cutting. And with a mag drill, there is a limit to
the grip it has to the workpiece (mostly a function of the thickness if
the workpiece is a mild steel -- and, of course, no grip on aluminum, :-)

Also -- because you are removing less metal, you need less
horsepower in the cut.

Enjoy,
DoN.

--
Remove oil spill source from e-mail
Email: | (KV4PH) Voice (all times): (703) 938-4564
(too) near Washington D.C. | http://www.d-and-d.com/dnichols/DoN.html
--- Black Holes are where God is dividing by zero ---

I have the mag drill but not the cutters. Want to sell or trade for
something?

Karl

I'm guessing the smaller ones would also do a good job of drilling out spot
welds where a regular drill bit would have to fight through whatever
localized hardening occurred at the weld. They make specialized bits for
this that look like tiny hole saws with a centering spring loaded pin, but
these should do a good job as well.

-----
Regards,
Carl Ijames

"Ed Huntress" wrote in message
...

On Sat, 31 Aug 2013 16:50:39 -0700 (PDT), Ivan Vegvary
wrote:

Scored 10 annular cutters at a garage sale for $5.00. They all look brand
new. They range from 7/16" diameter to 1 inch. Cutting depth is 2
inches.

What is the purpose of these cutters. If I put one in my milling machine
and push it through, say, 1/2" plate, the end result will be the same had I
used a solid milling cutter. Why would I ever want an annular groove in a
piece of metal other than for an "O" ring?

Please enlighten me. I realize that mag drills use these, but don't know
why.

Ivan Vegvary

Less force required for drilling. Better lubrication. With a center
pin, better centering. Better chip removal. Less runout and lobing.
Fewer burrs.

Good ones are great tools. Poor ones will drive you crazy.

--
Ed Huntress

On 8/31/2013 7:50 PM, Ivan Vegvary wrote:
Scored 10 annular cutters at a garage sale for $5.00. ...

What is the purpose of these cutters. ...
...

They have no purpose. Feeling sorry for you, I'll take them, give you
the $5 you squandered & pay postage too. BG Bob

On Sun, 01 Sep 2013 09:16:38 -0400, Bob Engelhardt
wrote:

On 8/31/2013 7:50 PM, Ivan Vegvary wrote:
Scored 10 annular cutters at a garage sale for $5.00. ...

What is the purpose of these cutters. ...
...

They have no purpose. Feeling sorry for you, I'll take them, give you
the $5 you squandered & pay postage too. BG Bob


ROFLMAO!!!

Your one hell of a nice guy Bob! I like you!!


"The socialist movement takes great pains to circulate frequently new labels for its ideally constructed state.
Each worn-out label is replaced by another which raises hopes of an ultimate solution of the insoluble basic
problem of Socialism, until it becomes obvious that nothing has been changed but the name.
The most recent slogan is "State Capitalism."[Fascism] It is not commonly realized that this covers nothing more
than what used to be called Planned Economy and State Socialism, and that State Capitalism, Planned Economy,
and State Socialism diverge only in non-essentials from the "classic" ideal of egalitarian Socialism. - Ludwig von Mises (1922)

On 8/31/2013 7:50 PM, Ivan Vegvary wrote:
Scored 10 annular cutters at a garage sale for $5.00. They all look brand new. They range from 7/16" diameter to 1 inch. Cutting depth is 2 inches.

What is the purpose of these cutters. If I put one in my milling machine and push it through, say, 1/2" plate, the end result will be the same had I used a solid milling cutter. Why would I ever want an annular groove in a piece of metal other than for an "O" ring?

Please enlighten me. I realize that mag drills use these, but don't know why.

Ivan Vegvary



This is a horrible, *horrible* example video... But it shows how you
can use annular cutters with plug ejection on an automated process.

We have done up to 2" diameter holes now (maybe larger? I'm not sure)
with a 2 HP machine and 1000 lbs. or less of thrust.

http://www.youtube.com/watch?v=_dxNeKD-f50



--
http://tinyurl.com/My-Official-Response

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://www.Drill-HQ.com/?page_id=226
VIDEOS: http://www.youtube.com/user/AutoDrill
FACEBOOK: http://www.facebook.com/AutoDrill
TWITTER: http://twitter.com/AutoDrill

V8013-R

Ivan Vegvary wrote:
Scored 10 annular cutters at a garage sale for $5.00. They all look
brand new. They range from 7/16" diameter to 1 inch. Cutting depth
is 2 inches.

What is the purpose of these cutters. If I put one in my milling
machine and push it through, say, 1/2" plate, the end result will be
the same had I used a solid milling cutter. Why would I ever want an
annular groove in a piece of metal other than for an "O" ring?

Please enlighten me. I realize that mag drills use these, but don't
know why.

Ivan, Joe mentioned why, but only said it in passing.

Becaus you are removing so much less metal, it requires less spindle
horsepower and less pressure for the same size of hole.

Imagine attempting to drill a 4" hole in a wooden plank with a solid bit,
and an electric hand drill; you just could not. Now, stick a 4" "hole
saw" in there... and yes you can! (still tough, but it will work!)

Lloyd