Rick,
I used fire brick for the inner lining on my foundry & cut the notches for the element using my table saw & 3 or 4 masonry blades stacked together like a Dado Blade used on wood. It took no time at all to cut the groves in the bricks, but having a well tooled wood working shop does help :)
Brian
--- In gingery_machines@yahoogroups.com, Rick Sparber <rgsparber@...> wrote:
>
> Ron,
>
> One nice thing about the Hartman furnace is that the soft firebricks can easily be slotted in order to hold the element. I used a table saw but if I do it again, would use a simple hacksaw and my finger. The stuff cuts like balsa wood except is brittle.
>
> Rick
> Rick.Sparber.org
>
> On Sep 12, 2011, at 7:31 AM, Ron Thompson <ron@...> wrote:
>
> > On 9/11/2011 10:50 PM, confed2001 wrote:
> >> Am I to understand that you are using this to control the temperature
> >> of an electric foundry such as the Gingery "Little Bertha"? I got a
> >> set of plans for an electric foundry from this site:
> >>
> >> http://www.dansworkshop.com/aluminum-foundry/homebuilt-electric-melting-furnace.htm
> >>
> >> It works & I have been using it for several years, but despite what
> >> the plans say it does not get hot enough to melt copper much less
> >> brass. I constructed the controller as described in the plans, and am
> >> using the heating elements stated, but aluminum is the best I can get
> >> out of it. If this controller will raise the temp of a small electric
> >> foundry than I need to get one.
> >>
> >> Brian
> >
>
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