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Type: Posts; User: CrazyBillyBob

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  1. Razor, If your really worried about that last...

    Razor,

    If your really worried about that last 1.5V (61.5 vs 60V) to the motor.... Throw in another snubber diode. it will drop the remaining 1.5v (depending on diode 1.7V) and your golden. It's...
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    Remember when designing something. The toughest...

    Remember when designing something. The toughest thing on a tool is the 200 pound Gorilla with it in their hands.
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    To be honest... I'm a fan of the Smooth on guys....

    To be honest... I'm a fan of the Smooth on guys. Always helpful and seem to have a product to save the day. Not that I use much silicone. Most of my stuff was tin cure as it's a lot less picky and I...
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    Thanks Spelter. For the type of things I'm likely...

    Thanks Spelter. For the type of things I'm likely to cast...a tiny amount of ash isn't a deal breaker.
    Jag... if you live close to Chicago or one of the other Freeman offices they have different...
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    FMSC Master ProtoWax

    Has anyone used FMSC's Master Protowax https://www.freemansupply.com/products/specialty-waxes/master-protowax/master-protowax-stock-size-blocks

    Looks interesting had a chance to get a 2"x3"x7"...
  6. Thread: Cx5

    by CrazyBillyBob
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    I got in on the Kickstarter awhile ago. Waiting...

    I got in on the Kickstarter awhile ago. Waiting for it to show up... Really want to give it a try.
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    Peedee is on the right track for life casting....

    Peedee is on the right track for life casting. Start with an Alginate cast. Fill it with plaster. Then use the plaster master to make the silicone mold. There are some lifecast friendly silicones out...
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    The Other option for the tuyere is to take half...

    The Other option for the tuyere is to take half the pipe size out of 2 blocks. That's roughly 1.5" per block. It should leave you plenty of strength.
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    Hit up Craigslist. You will be surprised at how...

    Hit up Craigslist. You will be surprised at how many pottery "kilns you will find for $50-100. Might be a little on the big side...but if you have 220v you should be ok.
  10. Big steel arc furnaces have 2 carbon electrodes....

    Big steel arc furnaces have 2 carbon electrodes. One is neutral, one is the hot. Both get plunged into the metal. I'm pretty sure that the goal is an arc so the electrodes don't touch the metal just...
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    Rasper, The question is for the ferrosilicon...

    Rasper,

    The question is for the ferrosilicon because of cost. For the quantity I'm looking to do (small) 95-98% is 50% less expensive.
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    Ferrosilicon and metals

    I know that ferrosilicon is used for Cast Iron casting. I also know that we need to add silicon to aluminum to make it cast better and shrink less. I'm also remembering some discussion on if...
  13. If you're going to do bronze, copper or higher...

    If you're going to do bronze, copper or higher temps. Don't use perlite. It turns into a flux at temp and will erode your hot face. May work ok for the insulation but not for the hot face.
    CBB
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    Whatever Kville doesn't want... I can take off...

    Whatever Kville doesn't want... I can take off your hands.
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    Sticky: Bob, I think I have some of your handy work in...

    Bob,
    I think I have some of your handy work in one of my Tool boxes ....and under one of my cars. (I have a Model T). I love to see how everyone does this especially in a small run kind of setup.
    I...
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    I'm not sure I would let the Horse power Resistor...

    I'm not sure I would let the Horse power Resistor stop me from buying the board. They can be had on amazon for about $2.50us to $5.00us (this link is to a 1HP resistor..but it gives you the idea)...
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    The hollow spot you got looks like shrinkage. As...

    The hollow spot you got looks like shrinkage. As the metal cools it shrinks if there isn't any liquid metal around to get pulled in you get the hollow. You seemed to be able to machine this part out...
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    Only thing I have heard about that might be close...

    Only thing I have heard about that might be close to Acetone for PLA is Tetrahydrofuran (THF) .... I wouldn't use it in my house , and I would make sure both pairs of gloves I had on were not latex....
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    That is some Great work!! You really need to look...

    That is some Great work!! You really need to look into setting up an etsy storefront www.etsy.com That is a place that you can find the folks looking for items like this with a bank roll to match.
    ...
  20. One thing I like to do to keep spatter (and...

    One thing I like to do to keep spatter (and arching away) when I weld a nut on like this is to cover the bolt (throw away kind) in mig nozzle jelly (or spray) then screw it in. As long as you keep it...
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    PM has been Sent to you with an option. ...

    PM has been Sent to you with an option.

    Thanks,
    CBB
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    I need to find somewhere new to go to the...

    I need to find somewhere new to go to the sale.... If it goes up for sale here it goes sky high.

    Nice finds!

    CBB
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    Hit the local big box hardware .... pick up some...

    Hit the local big box hardware .... pick up some phosphoric acid (or Behr Concrete Rust Stain Remover) and wipe it down. Let it set for a few minutes rinse and dry. It's the active ingredient in most...
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    The rusted areas turn dark because of the process...

    The rusted areas turn dark because of the process breaking down the rust into Iron and Magnetite. It should clean off. If some of it doesn't Primer should stick to it with no problems. But those area...
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    J., There is no Hurry....The Old girl has been...

    J.,

    There is no Hurry....The Old girl has been sitting there in pieces for several years....and that is not "the part" that will get her running.

    CBB
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