I've seen the grooves cut in IFB using a standard masonry drill in a
drill press. The IFB was held at about 45 degrees using a simple board
as a guide and moved along to route the groove. The resulting groove
was sort of U shaped and deep enough to contain the element, every few
inches the element was pinned using Kanthal wire staples to hold it in
place.

me2 wrote:

On Sat, 04 Feb 2006 09:01:21 -0800, rashid111 wrote:

Do NOT buy Ni/Cr. It will never last.
If you do, make sure you buy the right
one (McMaster does NOT have it, MSC
does).

Instead, buy Kanthal. resistancewire.com
is a good source. There's something like $50 minimum, but it will last
you a lifetime.

When you wind it (lathe etc) make sure do it nice and slow, don't twist
it too much.

Any stress can be lethal to the spiral @ 1100C



What I'd like to know is how to hold the windings in the furnace chamber.
Cut grooves in the wall ? Do they need to L shaped with the leg of the L
going down ?