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Thread: Magnetic Circle Cutter

  1. #1
    Moderator KHK's Avatar
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    Magnetic Circle Cutter

    Magnetic Circle Cutter

    I had an old canera tripod that I modified for a traming tool about 25 years ago. Like many people I don't throw any thing away unless it is totaly shot. So I modified the old tool for a new one. Old Junk into new junk!!

    Parts list

    1) Old camera trypod
    2) HF Magnetic ground block 30754
    3) 2" dia x 3/4 long al stock
    4) 3/8 - 16 bolt 1/2 long
    5) 3/8 flat washer Q 2
    6) 1/4 20 x 1 bolt & lock washer
    7) Nut from a 3/4" diaelectric union (Plasma torch holder)

    The tool will adjust from 4 in to 127 in. Much more than I will EVER use!
    The legs from the trypod screw together to get to the max length

    I added the roller assembly as a after thought. When the leg(s) is extended it tends to sag. the roller maintaines the correct plasma to work distance.

    The 1/4 bolt is for non magnetic material. Drill a 1/4 in hole for center

    Sorry, only two welds for the entire project. Some lath work on the swing nuckle, and trypod legs.

    tryed to post 6 times

    keith
    Attached Images Attached Images    
    Last edited by KHK; 04-11-2009 at 10:50 PM. Reason: Added Picks
    keith
    The older the Boys, the more expensive the TOYS
    Previously Owned equipment;
    lot's
    Current equipment;
    3HP Speedair air compressor, Wilton drill press, Craftsman 10x36 lathe, 10 ton hydrolic press, Portaband band saw, OA torch, Small home brew CNC machine, powered by my 200PI
    2 Longevity autodarking helmets
    160d MIG
    WeldAll 200PI

  2. #2
    HerbD
    Guest

    Re: Magnetic Circle Cutter

    Kieth,

    Cool idea. What a great range of size possibilities! I knew there was a reason that I bought that magnet base at HF when it was on sale. A new gadget to build . . .

    Thanks for sharing the idea and pictures.

    HerbD

  3. #3

    Re: Magnetic Circle Cutter

    What a great idea Keith. I am sure there will be many copies of this floating around now.

    Dan
    Units owned Longevity PROmts 200
    Longevity WeldPro LS200PI (IGBT)
    Force Cut LP80 plasma cutter
    Longevity auto dark welding helmet

    Atlas 10x36" lathe
    Craftsman 5HP 30 Gal compressor
    Home made CNC router/plasma/hot wire foam cutting, 3D printing table powered by Longevity Force Cut LP80
    Home built aluminum foundry, HF 4x6 bandsaw, O/A torch

  4. #4
    Senior Member arandall's Avatar
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    Re: Magnetic Circle Cutter

    Keith:

    That's really neat!! - how do you tighten the 3/4" union nut onto the plasma torch body?

    Art R.
    Cheers,
    Art R.

    Longevity LS200-PI multi-purpose cutter/welder,
    Miller 180 Auto-Set MIG,
    Custom 5hp compressor,

  5. #5

    Re: Magnetic Circle Cutter

    great idea

  6. #6
    Moderator KHK's Avatar
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    Re: Magnetic Circle Cutter

    arandall said
    how do you tighten the 3/4" union nut onto the plasma torch body?
    I had to remove the threads on the nut. After removing the threads the nut is like a cup. Then the union nut just fits the plasma torch. The torch will rotate 360 deg in the nut.

    keith
    keith
    The older the Boys, the more expensive the TOYS
    Previously Owned equipment;
    lot's
    Current equipment;
    3HP Speedair air compressor, Wilton drill press, Craftsman 10x36 lathe, 10 ton hydrolic press, Portaband band saw, OA torch, Small home brew CNC machine, powered by my 200PI
    2 Longevity autodarking helmets
    160d MIG
    WeldAll 200PI

  7. #7
    Senior Member arandall's Avatar
    Join Date
    Dec 2008
    Location
    Saskatoon, Saskatchewan, Canada
    Posts
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    Re: Magnetic Circle Cutter

    I wonder how long it will be before the wife notices her camera tripod missing a leg.

    Art R.
    Cheers,
    Art R.

    Longevity LS200-PI multi-purpose cutter/welder,
    Miller 180 Auto-Set MIG,
    Custom 5hp compressor,

  8. #8

    Re: Magnetic Circle Cutter

    Cool tool, dude!
    (Retired) professional firefighter. Amateur everything else I try to do...
    and I do some of it with:
    Longevity MIGWELD 140 yeah baby!
    Longevity LP40
    , <------ oh yeah!
    Mig: Century 80, Clarke 150EN
    O/A setup
    Lincoln 225 tombstone
    grrrrrinders, bench and ra
    hf drillpress, and files! and pliers! and hammers! and and - OK, whew, got that out of my system!
    Oh yeah: GO BIG RED! (Now one of the 12 members of the Big 10 cuz we left the 10 members of the Big 12)

  9. #9
    I was thinking of something like that but for straight lines. Since my first chore is cutting some 4x6 sheets of diamond plate.
    Hobart Handler 140 mig
    Lincoin arc welder
    CH 8hp 60gal air compresser
    Longevity LP50D plasma cutter
    a can of WD-40, vice grips, and a roll of duct tape

  10. #10
    tomsign
    Guest
    Keith, great idea, will keep it in mind, I have an extra tripod my Boss was kind enough to break for me, now I have a use for it.
    just have to make swapable ends so I can use on AL.
    Tomsign

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