While reading another thread here, I noticed some comments about what types
of cutting wheel to use for cutting metal. One person wrote,
"Although steel is tough on a diamond blade, it isn't instant death.
I have used mine in reinforced concrete. I have also used a diamond
wheel on cast iron pipe. (just because it was tight and a fiber wheel
wore down too fast)"
My question is, for cutting cast iron sewer pipe -- with an angle grinder --
what type of wheel/cutter is recommended?
I always thought that any "metal cutting" wheel/cutter would be fine --
maybe a diamond blade? But, what are the possible choices, and what would
people here suggest or recommend?
That's what the pros that I've seen use.
Fast and much easier, especially in tighter
locations. Just to be clear, the chain cutter is not
a chainsaw. It's a chain with steel wheel like things
on it. It goes around the pipe and gets tightened,
putting high pressure on the pipe until it cracks.
I would recommend using an angle grinder with an abrasive cut off wheel. I
don't use snap/chain cutters on old cast because it could break the pipe fu
rther up and you could end up with a lot bigger job than you wanted to get
into. You can use just regular metal cut off wheel, I do this often. Hopefu
lly this was helpful to you.
Thanks. I know about those and even used one once. It worked well when I
used it, but they can sometimes be a problem if the sewer line is worn
because it can break the pipe instead of cutting it off cleanly.
But, I am asking specifically in regard to an angle grinder. I have seen
them used a number of times and they work well. However, I am just curious
about the type of cutting wheel to get for cutting cast iron sewer pipes.
On Friday 04 January 2013 15:48 TomR wrote in alt.home.repair:
Personally I would use a standard metal cutoff disc (well, several as
required). I would also try to dig out and expose the pipe from all sides
and go round it with a 4 1/2" sized grinder rather than trying to put a 12"
grinder through from one or two sides - less chance of snagging the disc and
exploding it into a multitude of high speed daggers!
Needless to say, safety googles are a must for a job like this, ear
defenders would be wise as would heavy work gloves.
Tim Watts Personal Blog: http://www.dionic.net/tim /
"History will be kind to me for I intend to write it."
I did see that YouTube video and almost posted the link myself. And, I did
remember the part where the guy talks about wearing a facemask because the
angle grinder wheel could break apart and send pieces into someone face like
happened to the person he knows.
I don't have any one particular job in mind. I have a contractor who has
done a number of sewer lines for me and others (where I was there) and he
always uses an angle grinder. I am sure now that he uses a metal cutoff
wheel like someone else here suggested. But, I was curious because I saw
the other post in another thread about using a diamond blade and wondered
I forget which YouTube video I also saw today that talked about what I
mentioned earlier about the snap cutter -- that it can break or crush the
pipe instead of cutting it off cleanly, especially for old pipe. And that
person suggested using an angle grinder instead of a snap cutting tool for
that type of pipe.
Same vid, but at the end he seems to say go for the snap cutter.
I don't know what "old" is. The ones I helped with were maybe 60
years old. Toilet stacks. Apartment building reno in Chicago.
Only saw it done twice, and I was the helper.
As in "Hang onto this stack and don't let it move after I snap it."
More interesting was watching him stuff oakum into the new joints and
melt lead into it. Nice looking joints. Pretty much all I remember
about those stacks.
Interesting video but when it was over, a featured video popped up in
the frame and perhaps one could argue that it is related to plumbing but
it had me laughing so hard I almost fell out of my chair. ^_^
I've cut cast iron sewer pipe with a standard angle grinder cutting
blade. One blade should last long enough to cut thru a 4 inch pipe.
The regular blades are only around $2. A diamond blade will be much
more costly. Most of the time all you need to do is cut in half the
thickness of the pipe, and whack it with a hammer and it will break in
half. Warning, if you're cutting into an existing cast iron plumbing
stack, be aware that there may be hundreds of pounds of cast iron above
the cut that could crash down. Always secure it first. I saw one crash
once, and it was not a pleasant sight.
If you have the room the fiber disks are a lot cheaper but I was
working through a hole in the floor 16" down in the sand with limited
swing and the fiber disks were wearing out before I could get all the
way around so I chucked up a diamond disk so I had the full radius. It
worked fine for the 5 cuts I needed to make
I probably ate about 25-30% of the life of the wheel cutting five 3"
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