View Single Post
Old 09-06-2009, 09:42 PM
David Hopman David Hopman is offline
Registered User
Join Date: Mar 2009
Location: Sutter Creek, CA
Posts: 442
David Hopman is on a distinguished road

That's strange, because you'd think that with the ends of the elements sticking out of the back of the furnace, that at some place on them there would be a temp of 1200. I guess the lowered overall temp moves that 1200 point from the solid part to the spiral part and allows a crack. Taking the elements down to room temp doesn't seem to cause problems- 3 of mine have been cycled 5 times already with no issues.

Come to think of it, I used to lower the glory hole to 1590 at night. Stopped doing that because of some issues with the superstructure, but the elements seemed unaffected. Did that for at least a couple of years.

I didn't think that preheating the pellets was much trouble at all. I just filled up a stainless steel tray with 40 pounds of pellets, brought it up in the annealer, then dumped it in. It also reduced the temp loss in the furnace on a charge. I haven't been preheating the batch I'm using now, and have had no problems in 9 months.

Last edited by David Hopman; 09-06-2009 at 09:46 PM.
Reply With Quote