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Thread: Shop Made Tools

  1. #1221
    Join Date
    Jan 2004
    Posts
    112

    Default Plasma Guide--look Mom no clamps Req'd!!!!

    I have needed these for years, and for years I have cobbed together whatever steel I had around around the shop to do two things:

    1) Provide a straight edge for plasma cutting that was fast to set up

    2) Provide the proper offset above the tip to avoid blow back and have the consumables last longer. Please note the Miller Spectrum torch I have is not really a drag type and it should be spaced about 0.062 off the cutting surface.

    I also wanted to use these without the use of clamps to get in the way. The solution was those wonderful Neodymium magnets. I think the photos are self explanatory if there are any questions please let me know. The magnets are a press fit approx. 0.750 dia. so an end mill works great. The hole is bored a few thou deeper than the holder. I have made various lengths up to about 52" to cut sheets in half.

    I hope this might give you gents a few ideas for other applications.




    Last edited by hammerfest; 12-24-2011 at 04:30 PM.

  2. #1222
    Join Date
    Aug 2011
    Location
    South Florida
    Posts
    457

    Default

    [QUOTE=metalflyage]I made a jig plate when I was in collage that I copied from an optics table. I use it to setup projects as I build. Makes a great third hand. It is made from 6061-T6 12"x24" with 253 tapped 1/4-20 holes.

    Very nice and useful too!

  3. #1223
    Join Date
    Aug 2011
    Location
    South Florida
    Posts
    457

    Default

    [QUOTE=hammerfest]

    http://s359.photobucket.com/albums/o...t=100_3989.jpg

    What is this tool?

    Chris

  4. #1224
    Join Date
    Aug 2009
    Location
    the sub-tropical island of Anglesey, North Wales
    Posts
    1,334

    Default

    [quote=Chris S.]
    Quote Originally Posted by hammerfest
    Plasma cutter on a straight edge
    John

    I used to be indecisive. Now I'm not so sure , but I'm not a complete idiot - some bits are still missing

  5. #1225

    Default

    Sorry for not knowing, most systems down here in the south are air based. We have blowers, not pumps. Water might be used for radiant floor systems but those are rather rare. We don't have boilers or oil or coal systems. All natural gas, propane, or electric.

    Quote:
    Originally Posted by ArkTinkerer
    OK, I'm clueless--what did the unmodified pump come out of?

    There were 2 clues -

    Quote:

    Nb - most c/h pumps have 3 speeds

    Quote:

    Grabbed an old heating pump

    It's a standard central heating circulation pump.
    __________________
    John

  6. #1226
    Join Date
    Jan 2005
    Posts
    2

    Default

    I have to admit, I never gave the ceramic bearings any thought.
    I beat the ceramic spindle out of the armature, I replaced it with a steel spindle about 12" long and fitted 3 ballraces. Okay a bush would have been best at the bottom, but I had the 3 bearings and the only bronze I had is spoken for. Anyway it runs all day without any problem, and is a vast improvement on the Holley fuel pumps I usually use, no more paddling around in coolant;-)

    I know pretty much nothing about central heating, this lived on the wall at the side of the boiler and I guess it pumped the hot water around the house. It should have 3 speeds and the slowest[1400rpm] is something like 60W.

  7. #1227

    Default Large Bore Lathe Pt. 2

    Carrying on in the large bore theme I started last year with my chuck extension. This one came about because of a job at work. We have machines that have bars made of 1 1/2" SCH 40 stainless steel pipe with hubs welded in the ends. These bars are about 6' long and the ends are bored for a 5/8" bronze bushing. The holes are blind so there is no way to get a worn bushing out except to chisel it out. Don't even think about using a hand held drill to try and drill it out. Talk about a wrist buster and damaged bore.

    Our lathe only has a 1 5/8" bore. I contemplated figuring out how I could mount these bars on the carriage to bore the worn bushings out but with 9 of these bars to do and the setup time each end would require I didn't have the time so we send them out to the OEM for repair.

    This did plant the seed in my mind however and after running several scenarios over I came up with what you see. I used the 8" self centering 4 jaw chuck I used on last years project. It has a 2 1/2" bore. I then bought an 8" angle plate and mounted it to the lathe carriage in such a manner that it is locked down solid. The steady rest was already modified for roller bearings so it was a simple matter of machining a new anti rotation groove at 90 degrees to the existing ones so the bearings would run laterally.

    Considering that I used off the shelf Chinese parts it turned out very well. I only have about .002 " runout and an equal amount of off center laterally over an appox 2" depth.

    The test piece is 2" SCH 40 pipe about 6' long. I know the pic looking down the bore looks quite a bit off center but it really isn't. The camera flash makes it look that way.








  8. #1228

    Default Large Bore Lathe 2

    More pics.






  9. #1229

    Default

    Quick and dirty drill center/punch

    I made this from a broken end mill. I ground a VERY sharp point on it. So it is capable of punching mild steel. I just chuck it up, put it where it needs to go and stab it into the part. Chuck your drill up and your centered and the bit will not wonder off.....

    This is a set of soft jaws I made, not much has to be exact.

    This isnt as elaborate as most of your tools, but handy!

    Feel free to put me on ignore....

  10. #1230
    Join Date
    Aug 2011
    Location
    South Florida
    Posts
    457

    Default

    [QUOTE=jugs]
    Quote Originally Posted by Chris S.

    Plasma cutter on a straight edge
    Sorry for sounding like an idiot but I've never used or even seen one until now. Until now I've envisioned something like a large XRAY-esc machine.

    Thanks and nice work!
    Chris

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