I have to smash out some brick and cut a 7" round hole in a SS chimney
liner. Would a grinder be as simple as it gets.

I have to smash out some brick and cut a 7" round hole in a SS chimney
liner. Would a grinder be as simple as it gets.

7" is way too big for any one drilling tool I know of, but I'd personally do
it with multipel smaller holed made with a masonary bit then punch out the
center and smooth the edges with a chisel as needed, etc.
--


Regards,
Joe Agro, Jr.
http://www.autodrill.com
http://www.multi-drill.com

V8013

Know someone with a motorcycle in the NY Metro area?
http://host.mynocdns.com/mailman/lis...rides_yunx.com

If you've got room, a Dremel tool with a cutting wheel will do the job
on thin SST.

habbi wrote:

I have to smash out some brick and cut a 7" round hole in a SS chimney
liner. Would a grinder be as simple as it gets.

I have no problem getting through the brick, the problem will be cutting a
7" hole in the stainless steel liner that will join to a 7" "fishmouth"
shaped end of more liner.

"Joe" wrote in message
news:H7OTd.44822$W16.40285@trndny07...
I have to smash out some brick and cut a 7" round hole in a SS chimney
liner. Would a grinder be as simple as it gets.

7" is way too big for any one drilling tool I know of, but I'd personally
do
it with multipel smaller holed made with a masonary bit then punch out the
center and smooth the edges with a chisel as needed, etc.
--


Regards,
Joe Agro, Jr.
http://www.autodrill.com
http://www.multi-drill.com

V8013

Know someone with a motorcycle in the NY Metro area?
http://host.mynocdns.com/mailman/lis...rides_yunx.com

I have no problem getting through the brick, the problem will be cutting a
7" hole in the stainless steel liner that will join to a 7" "fishmouth"
shaped end of more liner.

I noticed that about 30 seconds after I posted my reply... But figured the
same method could be used in the stainless... with a metal cutting bit and
PLENTY of coolant.

You will not be able to drill many holes in stainless without keeping the
bit plenty cool with coolant of some sort. Don't even try...

Anyhow... You could still drill holes in a circular pattern and then use a
small dremel or sawzall-type blade to connect the dots and get a roundish
hole.
--


Regards,
Joe Agro, Jr.
http://www.autodrill.com
http://www.multi-drill.com

V8013

Know someone with a motorcycle in the NY Metro area?
http://host.mynocdns.com/mailman/lis...rides_yunx.com

I did it today and found out something about die grinders. They lose power
very quickly as the dia. of the bit is increased. I started off with a die
grinder with 3" cut off disk and it was not doing very well. Then I said
what the hell and put the cut-off disk in the drill and it worked 10 times
more efficiently. The drill turn around 2000 rpm and the die grinder about
10000 rpm.
I made the hole about 1/4" small all around and then cut slots every 1/2"
and bent them out to fit in to the fishmouth of the connecting pipe. Screwed
it together and it went smoothly. Thanks for all replies.


"Joe" wrote in message
news:JuVTd.32718$ya6.18605@trndny01...
I have no problem getting through the brick, the problem will be cutting
a
7" hole in the stainless steel liner that will join to a 7" "fishmouth"
shaped end of more liner.

I noticed that about 30 seconds after I posted my reply... But figured
the
same method could be used in the stainless... with a metal cutting bit
and
PLENTY of coolant.

You will not be able to drill many holes in stainless without keeping the
bit plenty cool with coolant of some sort. Don't even try...

Anyhow... You could still drill holes in a circular pattern and then use
a
small dremel or sawzall-type blade to connect the dots and get a roundish
hole.
--


Regards,
Joe Agro, Jr.
http://www.autodrill.com
http://www.multi-drill.com

V8013

Know someone with a motorcycle in the NY Metro area?
http://host.mynocdns.com/mailman/lis...rides_yunx.com