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Thread: Home-made furnace for hardening

  1. #1
    Senior Member GVIkzn's Avatar
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    Default Home-made furnace for hardening

    Hi gents!
    I decided to make a muffle furnace
    I read the forums, made calculations, collected materials.
    For hardening of knives and razor blades to me more than enough
    Internal Dimensions: Diameter - 50 mm, length - 280 mm. The design temperature up to 1000 degrees. Celsius.
    Automatic first made on thyristors, but for some reason he was burned in the tests, and I remade by a magnetic switch. It seems as long as everything works. Will soon begin full operation, except the furnace should be much more.
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    Last edited by GVIkzn; 05-16-2013 at 05:53 AM.
    If something is unclear in the text, please correct me ......

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    ScottGoodman (05-17-2013), spazola (05-16-2013)

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    Admin & Forum fixer Bruno's Avatar
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    Cool. What materials did you use?
    Happiness is a field, littered with the mangled corpses of your enemies. - Vlad III of Wallachia

  4. #3
    Senior Member GVIkzn's Avatar
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    The base of the big old electrical fuse
    Heater - nichrome wire 1 mm.
    Plastering - chamotte clay to 1600 C
    Winding - asbestos cloth.
    Thermal insulation - basalt wool
    The rest can be seen in the photo
    Substance likes this.
    If something is unclear in the text, please correct me ......

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    Admin & Forum fixer Bruno's Avatar
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    Can you still get Asbestos cloth in Russia?
    Substance likes this.
    Happiness is a field, littered with the mangled corpses of your enemies. - Vlad III of Wallachia

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    Senior Member GVIkzn's Avatar
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    Do not quite understand your question.
    Asbestos we can buy
    Stozzberry and Substance like this.
    If something is unclear in the text, please correct me ......

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    Senior Member bongo's Avatar
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    That looks fantastic mate ....Thanks for sharing with us !!

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    How nice, ... more info as you go please :-D

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    Admin & Forum fixer Bruno's Avatar
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    Quote Originally Posted by GVIkzn View Post
    Do not quite understand your question.
    Asbestos we can buy
    Asbestos is highly carcinogenic (asbestos particles cause lung cancer), and is not sold anymore in many Western European countries.
    Last edited by Bruno; 05-16-2013 at 01:10 PM.
    edhewitt and Substance like this.
    Happiness is a field, littered with the mangled corpses of your enemies. - Vlad III of Wallachia

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    Senior Member blabbermouth spazola's Avatar
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    That is the coolest thing I have seen in a while. Thank you for posting the pictures. It looks like a great design and build.

    Charlie

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    GVIkzn (05-16-2013)

  12. #10
    Senior Member GVIkzn's Avatar
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    Quote Originally Posted by Bruno View Post
    Asbestos is highly carcinogenic (asbestos particles cause lung cancer), and is not sold anymore in many Western European countries.
    I know
    Therefore, with the open side of all asbestos I smeared with chamotte clay.
    If there are cracks, they also glossed over.
    You have a very large selection of thermal insulation, you can do without asbestos. I used what I had.
    Neil Miller likes this.
    If something is unclear in the text, please correct me ......

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