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How do I cut this stuff?

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  • Fasttrack
    replied
    Originally posted by bborr01 View Post
    Water jet. I don't know if any of the people here have ever tried cutting anything that large with an abrasive wheel but you will most likely end up with a broken cutoff wheel stuck in the piece too. That won't make cutting it any easier either.
    I've cut 4140PH 5" in diameter with abrasive cut off wheels a number of times when I was younger. It was slow but effective, no broken wheels... Used wheels like the below in a 9" grinder. I'd score around the circumference to get a clear groove to follow by eye and then cut the majority of the way through on one side and rotate 90 to finish up.

    https://www.lehighvalleyabrasives.co...caApjREALw_wcB

    These days I'd probably torch it and, if I needed a clean face, hard turn / part in a lathe. Feels faster and quieter than running the angle grinder and I don't have a water jet!

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  • Sparky_NY
    replied
    Originally posted by Noitoen View Post
    Like this
    Damn ! The amount of oxygen used to cut that shaft into the pieces shown has to be unbelievable ! (Oxygen Lance video)

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  • Fasturn
    replied
    My bad.......didnt see the 21' long . Yes that's BiG.

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  • Fasturn
    replied
    Originally posted by Mcgyver View Post

    you have a wire EDM that will fit 21' stock? pics please


    at 21' just getting it to a shop is a chore. I would have torched it or done it with a zip disk
    Well that was kind of a joke, but shop I work at before retierment that would be the way. It's hard so a door open and a shop cart / supports and away you go. Wire can be expensive/ machine time, but they had that covered. Sometimes....ya just have to be a Mcgyver Lol.


    Last edited by Fasturn; 05-09-2021, 02:06 PM.

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  • Mcgyver
    replied
    Originally posted by bborr01 View Post
    Water jet. I don't know if any of the people here have ever tried cutting anything that large with an abrasive wheel but you will most likely end up with a broken cutoff wheel stuck in the piece too. That won't make cutting it any easier either.
    good point, I confess I have not done so....just thought torch or grinder because they're the most effective wholesale removal implements I've got. I guess I'd be back to the earlier suggestion of grind a ring then bandsaw. Figured the big bolt cutters were out

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  • bborr01
    replied
    Water jet. I don't know if any of the people here have ever tried cutting anything that large with an abrasive wheel but you will most likely end up with a broken cutoff wheel stuck in the piece too. That won't make cutting it any easier either.

    Leave a comment:


  • Noitoen
    replied
    Originally posted by boslab View Post
    The rods in a packed Lance are aluminium, boy do they burn quick, we had them, no one liked them, you’d need to screw one on the end of a plain Lance, just to distance yourself from the thermit reaction, 3/8 was popular, bigges I’ve used, 1”, that’s a 20’ long pipe, like a metal snowstorm
    mark
    Never seen aluminium. The one our guys use are packed in steel.

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  • boslab
    replied
    The rods in a packed Lance are aluminium, boy do they burn quick, we had them, no one liked them, you’d need to screw one on the end of a plain Lance, just to distance yourself from the thermit reaction, 3/8 was popular, bigges I’ve used, 1”, that’s a 20’ long pipe, like a metal snowstorm
    mark

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  • Noitoen
    replied
    Like this

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  • Noitoen
    replied
    We have a demolition department and besides the 6 feet long oxy torch, some cutting jobs requires the use of a oxy lance. It starts with a 10 feet long 1/2 inch steel pipe filled inside with 1/8" steel rods tacked together to occupy the inside of the pipe. A ball valve connects to a check valve and oxygen tank. To light the thing, another torch is used to heat the other end till red hot and the oxygen is opened. The resulting reaction is so violent that it will cut almost anything including concrete.
    It will carry on cutting untill you shut off the oxygen or the pipe is so short that you cant bear the heat

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  • Mcgyver
    replied
    Originally posted by Fasturn View Post
    Wire EDM.... doesn't everyone own one ?
    you have a wire EDM that will fit 21' stock? pics please


    at 21' just getting it to a shop is a chore. I would have torched it or done it with a zip disk

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  • boslab
    replied
    I read the oxy cut rotate thing, I do it differently myself, I bottom cut upwards, but it’s how I learned, big rolls and stuff you couldn’t rotate so we’d lift an end on blocks and start under it, the slag, dross etc dropped out of the cut instead of into it which was helpful, same as lancing type of thing, I’d be tempted to take a s petrol cutter to it myself, like sthil or somthing
    mark

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  • Fasttrack
    replied
    Originally posted by Plain ol Bill View Post
    Farmed it out to a local shop with a big band saw. Cost $$ but got to get it cut somehow. Didn't have a clue where I could find anyone that had a lathe that could handle 5 1/2" round stock 21 ft long close to me.
    You failed to mention the fact that it was 21 feet long! Do you have a gas axe? I would have cut off a workable length with the torch and then cleaned it up with a grinder if I didn't have a lathe that could hard turn it.

    Glad you got it cut in the end. I'd be interested to see the final product. And what will you do with the remaining length??

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  • Fasturn
    replied
    Wire EDM.... doesn't everyone own one ?

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  • Bob Engelhardt
    replied
    Originally posted by Plain ol Bill View Post
    ... 5 1/2" round stock 21 ft long close to me.
    Yikes - didn't know the 21' long aspect!

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