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  1. Sort of takes some of the fun out of building a...

    Sort of takes some of the fun out of building a blower for your impeller though




    If it was well designed the optimal impeller port sizes are dictated by the impeller characteristics and vice...
  2. r4z0r, if that motor doesn't work out here's a...

    r4z0r, if that motor doesn't work out here's a possible alternative.
    ...
  3. Universal Motor - These days pretty much every...

    Universal Motor - These days pretty much every shop vac, router and higher rpm woodworking tool 15 amps or less.....and many others

    https://en.wikipedia.org/wiki/Universal_motor

    Best,
    K
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    Here’s the central vac motor and specs. The...

    Here’s the central vac motor and specs. The Ametek units sell for ~$90 shipping included but can be bought for $40-45 new/used if you watch. There are several knock offs of the same unit that can be...
  5. The figures in Ironsides first post in the quoted...

    The figures in Ironsides first post in the quoted link are in general agreement with the thread I started here
    ...
  6. If your talking the thread in the burner section,...

    If your talking the thread in the burner section, its says 100cfm for ~500kbtu, but that's just based upon 20% more than is needed for stoichiometric burn of the fuel and I'm open to being challenge...
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    Appreciate that J and the advice. Growing up I...

    Appreciate that J and the advice. Growing up I spent alot of time in the shop with my father. We built all kinds of things. A good dose of common sense and trial and error can go a long way. I have...
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    Looking good. I don't think I've ever seen a four...

    Looking good. I don't think I've ever seen a four wheel sander before. Earlier in the thread it looked like 3 wheel. What inspired the change?

    Best,
    Kelly
  9. I've had several DC gear motors driving home...

    I've had several DC gear motors driving home built lead screw actuators in service for 20+ years that only have transformed AC and a full wave rectifiers for a power source. They are using...
  10. Do you know the mesh size? Best, K

    Do you know the mesh size? Best, K
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    I did see your build and liked the lost wax...

    I did see your build and liked the lost wax (crayon) approach you used and also the result it achieved. However, I think the design approach I took has locked me into a tubular burner in a tangential...
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    Thanks for that Justin. I started a thread in the...

    Thanks for that Justin. I started a thread in the burner section and was thinking of you when I said Monster burner and was figuring you were North of 500kbtu/hr. Hard to say how much based upon the...
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    That looks like a great improvement Justin. May I...

    That looks like a great improvement Justin. May I ask approximately how much oil you use (per hour if your know) and iron you melt in a typical melt?

    Best,
    Kelly
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    Lookin good Pete. That's definitely the second...

    Lookin good Pete. That's definitely the second best use for a beer keg (first requires a tapper:rolleyes:). Hopefully the weather will ease up a bit for you. You're WMO fueled, correct?

    Best,...
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    I'm going to try to get there with NG but for...

    I'm going to try to get there with NG but for oil, I didn't consider the additional compressed air. I thought it would be small compared the blower fed air, but even for drip, more than 100cfm? This...
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    It's a right of ascension like the first paint...

    It's a right of ascension like the first paint chip or door ding in your new car.




    Yah, offset lap joint. I just clamped it to my welding table sandwiched between a piece of heavy angle on...
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    Furnace Build Update January 8th, 2016 Back at...

    Furnace Build Update January 8th, 2016

    Back at it. I made the sheet metal skins, cut/fit the ceramic wool, and united all the pieces of my larger furnace.
    ...
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    Looks like a decent rig. Agree the lamp post is...

    Looks like a decent rig. Agree the lamp post is priceless and his pouring shank could use a little work. I Think he'd do better with a side pour and a shank that griped the crucible midway up instead...
  19. So as not to hijack Zaps thread, I started a...

    So as not to hijack Zaps thread, I started a thread on air flow required to produce 100kbtu/hr here and looking for some feedback.
    ...
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    Volumetric flow per 100kbtu/hr.

    I’ve been thinking about the burner for my larger furnace and was just looking for some feedback. I’ve been reading here and on the web and I plan to use natural gas as fuel but thought I may as well...
  21. Volumetric Air/Fuel required for 100kbtu/hr

    Probably been asked and answered many times for but for youburner engineers:



    At stoichiometric burn, how many cubic feet per minute ofair and natural gas are required to produce 100kbtu/hr?
    ...
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    Burlington, IA? Hey, that's just 80 miles S-SW of...

    Burlington, IA? Hey, that's just 80 miles S-SW of God's Country :rolleyes:



    The forum posts don't hang around the top very long so unless you browse deeper into the most recent posts it's easy...
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    Have a look here Dave. ...

    Have a look here Dave.

    http://www.alloyavenue.com/vb/showthread.php?8279-Over-Under-Arm-Router&p=130776#post130776

    I did a lot of cabinet making and some pattern work in the distant past. The...
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    More fun with castable refractory. -The Lid. I...

    More fun with castable refractory. -The Lid.

    I updated the build thread on page 1, at the end of post # 6 under the heading Furnace Build Update 1-2-2017 but I’m at picture limit there so here’s...
  25. It’s coming along RZR. I originally thought you...

    It’s coming along RZR. I originally thought you were planning to use a cordless drill to power the lead screw. Since you have the motor/gear reducer, will that be mounted low near the base under the...
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