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  1. #1
    Join Date
    Aug 2008
    Posts
    52

    Cutting 1" with 1650

    We are mechanised piercing and cutting some 1" mild steel plate with a 1650. g3
    I know its not recommended to pierce but if you had to...
    Do you have any tips ?
    We're getting a lot of metal splatter on the shield... this is the worst bit.

    Thanks

  2. #2
    Join Date
    Oct 2006
    Posts
    58
    Drill pilot holes where your pierce points are.
    I also use a 1650 and, cut some 20mm plate a couple of years ago, complete with many pierces and, wasted so many consumables, I drew a line in the sand and, now don't pierce anything over 16mm.

    Mick.
    Aussie

  3. #3
    Join Date
    Jan 2008
    Posts
    2247
    You will not be able to pierce 1" plate with a Powermax1650 without damaging the shield and nozzle. It's maximum pierce capacity is 3/4". Drilling pilot arc holes is the best way to achieve 1" cutting...or edge starting. We normally recommend a 200 Amp plasma for the ability to pierce 1" materials.

    Jim Colt Hypertherm

  4. #4
    Join Date
    Aug 2008
    Posts
    52

    1" plate

    Jim

    We want to cut a 40mm hole in 25mm plate, we are going to drill a 5mm pilot hole right on the circumference of the circle and start and finish inside the drilled pilot hole... what size hole would you drill ?

    Is this the best way of doing this ?

    A boss will be welded in the 40mm hole , so the 5mm hole will be filled with weld. If there's anything left of it !

    The hole is over size so some taper isn't going to matter.

  5. #5
    Join Date
    Jan 2008
    Posts
    2247
    Any hole larger than about .100" (2.5 mm) will work fine. Make sure the nozzle orifice starts on the edge, make sure you program a pierce delay time to allow the arc to stabilize before movement starts.

    jim

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