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Type: Posts; User: Rasper

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    My experience with propane burners is that,...

    My experience with propane burners is that, outside of a closed space, they tend to blow themselves out when the flare no longer can hold the flame at the tip of the burner. A bad flare design or too...
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    Finally I am getting her wax ready to invest. ...

    Finally I am getting her wax ready to invest.

    https://spideroak.com/share/IZQW45DBMNUXO33SNNZQ/forums/home/ricardo/SpiderOak%20Hive/forums/alloy%20avenue/New%20Girl%20Tutorial/arm_cut_off_full.jpg...
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    Sticky: As long as the alloy is the same, you're good to...

    As long as the alloy is the same, you're good to go.
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    Sticky: I generally make one or two in mi larger...

    I generally make one or two in mi larger investments. I use cotton string and dip it in wax until it is the thickness I want.

    Richard
  5. That is good stuff QC. I take back what I said...

    That is good stuff QC. I take back what I said about the pointlessness of melting copper. You have made a point. Your castings are excellent. You have also made my primary point: it is not for...
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    I am guessing that you used a traditional plaster...

    I am guessing that you used a traditional plaster based investment material. That is all I work with in my foundry. I burn out at 1000 F. to 1200 F. It takes that much to burn out the bound 3water in...
  7. New people on here keep wanting to melt copper,...

    New people on here keep wanting to melt copper, and I keep asking why. What are you going to do with it after you melt it? Make electrical buss bars? Make a ring for your girlfriend that turns her...
  8. I mix it with just enough water that it will form...

    I mix it with just enough water that it will form a ball when pressed in my hand. I ram it up hard (and I mean hard) and then let it dry. When I fire it, it is pretty damn solid.

    The clay and...
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    I use a #8 and a #30. The #8 is too small, and...

    I use a #8 and a #30. The #8 is too small, and the #30 is too big. Next lifetime I'm going to set up for a #10 and a #20.

    Richard
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    They got out of the electric tool business and...

    They got out of the electric tool business and are strictly high quality air tools now.

    R
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    For tools such as angle grinders that get used...

    For tools such as angle grinders that get used sometimes for an hour or more non-stop, it is best to buy quality tools, not big box store stuff. Unfortunately, it's not so easy. You have to buy them...
  12. You don't have to get firebrick from Lowes. Ask a...

    You don't have to get firebrick from Lowes. Ask a local brick mason where he gets them. They use them for building fireplaces in houses.

    Richard
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    I like the way that turned out. I am in your camp...

    I like the way that turned out. I am in your camp on those dark brown patinas (I find them boring and depressing), and I am in your wife's camp on that box. Quite often less is more.

    I rarely use...
  14. I have made four propane burners. Two are Lionel...

    I have made four propane burners. Two are Lionel (our forum owner) designs, and two are Reil burners.

    This is the 1/2 inch reil.
    ...
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    Phosphor/copper can be had from your local...

    Phosphor/copper can be had from your local welding supplier.

    http://www.harrisproductsgroup.com/en/Products/Alloys/Brazing/Phos-Copper/Harris-0.aspx
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    Sticky: When slightly dissimilar alloys show up...

    When slightly dissimilar alloys show up differently is when you polish them to a mirror shine. Better be careful if that is ever your plan.

    Richard
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    This is what a propane flame should look like. ...

    This is what a propane flame should look like.

    http://i774.photobucket.com/albums/yy21/Raspero/casting/IMAG0006.jpg
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    I sent him an e-mail months ago and he never...

    I sent him an e-mail months ago and he never answered.

    Richard
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    I vote with HT-1 on using red brass scrap. It's...

    I vote with HT-1 on using red brass scrap. It's everywhere. Unless of course you are an incurable experimenter. Then go for it. Most plumbing valves and threaded fittings are red brass. (Brass pipe I...
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    Sticky: I once used an oil tank I made from a length of 4...

    I once used an oil tank I made from a length of 4 inch PVC pipe. Obviously the oil pressure at the burner varied as the level of oil went down. So I junked that and used a five gallon metal bucket. I...
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    Sticky: Here are some shots of a pre-cumbustion waste oil...

    Here are some shots of a pre-cumbustion waste oil burner I made from Mizzou castable refractory a few years ago as a test for a possible burn-out kiln burner. It worked great, but proved to require...
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    Sticky: Instead of just sand, you could use a mix of 1/3...

    Instead of just sand, you could use a mix of 1/3 clay and 2/3 sand (any kind of clay will do). Mix the dry ingredients well. Then wet the mix just until you will form a ball in your hand when you...
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    Sticky: I would recommend that you stay away from...

    I would recommend that you stay away from perlite; it will melt at bronze temperatures. Just use the furnace cement. That's what it's for: patching cracks.

    If you really crank up your oil burner...
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    Sticky: This furnace pictured above is so good as an...

    This furnace pictured above is so good as an alternative, not only for those folks who cannot get castable refractory, but for all of us, that I made it a sticky.
    ...
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    I secure my carbon rods by cutting a shallow...

    I secure my carbon rods by cutting a shallow groove in the rod near the end. The rod is a close fit in the metal conduit. I wrap a piece of #12 copper wire around the groove which prevents the carbon...
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