Home |
Search |
Today's Posts |
|
Metalworking (rec.crafts.metalworking) Discuss various aspects of working with metal, such as machining, welding, metal joining, screwing, casting, hardening/tempering, blacksmithing/forging, spinning and hammer work, sheet metal work. |
Reply |
|
LinkBack | Thread Tools | Display Modes |
#1
Posted to rec.crafts.metalworking
|
|||
|
|||
Looking for heating element for electric furnace...
We have a Barnstead electric bench top furnace. It uses a 1050 watt
heating element that measures 4 x 12 x 3/8 inches. The furnace goes to 1100 Celcius. The element burnt out. Does anyone know where I could get a replacement element without getting it from Barnstead ? Their prices are very high. Having seen how this furnace is put together, I will probably build my next furnace rather than buy one... |
#2
Posted to rec.crafts.metalworking
|
|||
|
|||
Looking for heating element for electric furnace...
http://euclids.com makes elements for all types of kilns. if they don't have
one, they can custom make one to your specs. regards, http://glassartists.org/chaniarts "me2" wrote in message news We have a Barnstead electric bench top furnace. It uses a 1050 watt heating element that measures 4 x 12 x 3/8 inches. The furnace goes to 1100 Celcius. The element burnt out. Does anyone know where I could get a replacement element without getting it from Barnstead ? Their prices are very high. Having seen how this furnace is put together, I will probably build my next furnace rather than buy one... |
#3
Posted to rec.crafts.metalworking
|
|||
|
|||
Looking for heating element for electric furnace...
On Fri, 03 Feb 2006 21:19:28 GMT, me2 wrote:
We have a Barnstead electric bench top furnace. It uses a 1050 watt heating element that measures 4 x 12 x 3/8 inches. The furnace goes to 1100 Celcius. The element burnt out. Does anyone know where I could get a replacement element without getting it from Barnstead ? Their prices are very high. Having seen how this furnace is put together, I will probably build my next furnace rather than buy one... If you're near Seattle then Seattle Pottery Supply is a good place for custom elements. ERS |
#4
Posted to rec.crafts.metalworking
|
|||
|
|||
Looking for heating element for electric furnace...
Eric R Snow wrote:
On Fri, 03 Feb 2006 21:19:28 GMT, me2 wrote: We have a Barnstead electric bench top furnace. It uses a 1050 watt heating element that measures 4 x 12 x 3/8 inches. The furnace goes to 1100 Celcius. The element burnt out. Does anyone know where I could get a replacement element without getting it from Barnstead ? Their prices are very high. Having seen how this furnace is put together, I will probably build my next furnace rather than buy one... If you're near Seattle then Seattle Pottery Supply is a good place for custom elements. ERS I would think an element from an electric stove would work. The oven element might be even better. John |
#5
Posted to rec.crafts.metalworking
|
|||
|
|||
Looking for heating element for electric furnace...
My home made furnace uses one 220 volt 1500 watt domestic stove-top spiral
wound element from the junk pile. Cost zero$. Dave "John" wrote in message ... Eric R Snow wrote: On Fri, 03 Feb 2006 21:19:28 GMT, me2 wrote: We have a Barnstead electric bench top furnace. It uses a 1050 watt heating element that measures 4 x 12 x 3/8 inches. The furnace goes to 1100 Celcius. The element burnt out. Does anyone know where I could get a replacement element without getting it from Barnstead ? Their prices are very high. Having seen how this furnace is put together, I will probably build my next furnace rather than buy one... If you're near Seattle then Seattle Pottery Supply is a good place for custom elements. ERS I would think an element from an electric stove would work. The oven element might be even better. John |
#6
Posted to rec.crafts.metalworking
|
|||
|
|||
Looking for heating element for electric furnace...
me2 writes:
Does anyone know where I could get a replacement element without getting it from Barnstead ? Coil your own from Nichrome wire. Calipers and Ohm's law will reverse- engineer the requirements. Search for "resistance wire" at http://www.mscdirect.com/ where you can buy 1/4 lb spools relatively cheap. |
#7
Posted to rec.crafts.metalworking
|
|||
|
|||
Looking for heating element for electric furnace...
I'd use Kanthal A1 wire. I used it to make a brass casting furnace and it
worked well. Karl "Richard J Kinch" wrote in message .. . me2 writes: Does anyone know where I could get a replacement element without getting it from Barnstead ? Coil your own from Nichrome wire. Calipers and Ohm's law will reverse- engineer the requirements. Search for "resistance wire" at http://www.mscdirect.com/ where you can buy 1/4 lb spools relatively cheap. |
#8
Posted to rec.crafts.metalworking
|
|||
|
|||
Looking for heating element for electric furnace...
Look for resistance wire by the spool and wind your own. Use caution here
because not all wire is equal. Try to find life expectancy at 1500 C spec and compare. Steve "me2" wrote in message news We have a Barnstead electric bench top furnace. It uses a 1050 watt heating element that measures 4 x 12 x 3/8 inches. The furnace goes to 1100 Celcius. The element burnt out. Does anyone know where I could get a replacement element without getting it from Barnstead ? Their prices are very high. Having seen how this furnace is put together, I will probably build my next furnace rather than buy one... |
#9
Posted to rec.crafts.metalworking
|
|||
|
|||
Looking for heating element for electric furnace...
On Sat, 04 Feb 2006 03:59:40 +0000, David Anderson wrote:
My home made furnace uses one 220 volt 1500 watt domestic stove-top spiral wound element from the junk pile. Cost zero$. Dave What sort of temperatures do you run your furnace at ? |
#10
Posted to rec.crafts.metalworking
|
|||
|
|||
Looking for heating element for electric furnace...
On Sat, 04 Feb 2006 00:07:30 -0600, Richard J Kinch wrote:
me2 writes: Does anyone know where I could get a replacement element without getting it from Barnstead ? Coil your own from Nichrome wire. Calipers and Ohm's law will reverse- engineer the requirements. Search for "resistance wire" at http://www.mscdirect.com/ where you can buy 1/4 lb spools relatively cheap. Excellent resource. Thanks. |
#11
Posted to rec.crafts.metalworking
|
|||
|
|||
Looking for heating element for electric furnace...
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 |
#12
Posted to rec.crafts.metalworking
|
|||
|
|||
Looking for heating element for electric furnace...
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 $50 minimum, but it will last you a lifetime. When you wind it (lathe etc) make sure do it nice and slow, don't twist it too much. Any stress can be lethal to the spiral @ 1100C What I'd like to know is how to hold the windings in the furnace chamber. Cut grooves in the wall ? Do they need to L shaped with the leg of the L going down ? |
#13
Posted to rec.crafts.metalworking
|
|||
|
|||
Looking for heating element for electric furnace...
On Sat, 04 Feb 2006 03:59:40 +0000, David Anderson wrote:
My home made furnace uses one 220 volt 1500 watt domestic stove-top spiral wound element from the junk pile. Cost zero$. Dave Where do you place said element in the furnace ? On the floor of the chamber and then suspend a false floor above it ? I'd like to hear more about this setup. |
#14
Posted to rec.crafts.metalworking
|
|||
|
|||
Looking for heating element for electric furnace...
This will reply to me2's questions. My furnace is 18x18x18 inch #16 gage
sheet steel case with 2-inches high temp block and 2-inches low temp insulation on all surfaces. Thus, the chamber is 10x10x10 inches. The spiral 1500 watt element in on one vertical side wall. Actually, my first trial was with two identical elements on opposite sides, but it was overkill, and now I find that a single 1500 watt element is ok. I use it for wax melt-out for lost wax castings in brass. First phase about 250 deg for initial melt, then ramp up to 750 for two hours, then up to 1100 degF for final burn out. Never tried to melt brass or aluminum - for that I use propane fired naturally aspirated burner - about 1-1/2 inch x 10 inch pipe with #57 drilled orifice for the gas, modeled after Ron Reed's design. Bottled propane fuel at about 15 psi pressure. An earlier model used a old vacuum cleaner blower and natural gas, but this one is better. I am currently wiring up an Omega temperature controller so I can use the furnace unattended - right now it is on 100% manual control. If you build one, I would like to hear from you. Regards, Dave "me2" wrote in message news On Sat, 04 Feb 2006 03:59:40 +0000, David Anderson wrote: My home made furnace uses one 220 volt 1500 watt domestic stove-top spiral wound element from the junk pile. Cost zero$. Dave Where do you place said element in the furnace ? On the floor of the chamber and then suspend a false floor above it ? I'd like to hear more about this setup. |
#15
Posted to rec.crafts.metalworking
|
|||
|
|||
Looking for heating element for electric furnace...
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 ? |
#16
Posted to rec.crafts.metalworking
|
|||
|
|||
Looking for heating element for electric furnace...
On Sat, 04 Feb 2006 18:44:25 +0000, David Billington wrote:
every few inches the element was pinned using Kanthal wire staples to hold it in place. Tell me more about these staples. I'm beginning to think I am going to build a new furnace chamber to use open Kanthal wire elements. I'd like to cast a new furnace body using the home made pearlite castable refractory. I'd make the inner cavity mold with cardboard and maybe use some small rubber tubing to make the grooves for the wires. I'm just worried about the wires falling out of the grooves. Maybe these staples would be the ticket to keep them in. |
#17
Posted to rec.crafts.metalworking
|
|||
|
|||
Looking for heating element for electric furnace...
The staples were just like standard U staples but made from the Kanthal
wire. The staples overall were about 1" long and 3/8" wide and push into IFB fairly easily. me2 wrote: On Sat, 04 Feb 2006 18:44:25 +0000, David Billington wrote: every few inches the element was pinned using Kanthal wire staples to hold it in place. Tell me more about these staples. I'm beginning to think I am going to build a new furnace chamber to use open Kanthal wire elements. I'd like to cast a new furnace body using the home made pearlite castable refractory. I'd make the inner cavity mold with cardboard and maybe use some small rubber tubing to make the grooves for the wires. I'm just worried about the wires falling out of the grooves. Maybe these staples would be the ticket to keep them in. |
#18
Posted to rec.crafts.metalworking
|
|||
|
|||
Looking for heating element for electric furnace...
When you cut groves for the spirals, cut them at an angle
Look for my articles on how to build a home HT oven, there're links to pics there. Typical oven brick is very light & soft, you can literally make those spirals with yer fingernails. It is UBER important for the brick to be a good insulator - with inside temp in 2000F are, you should be able to touch the outside surface and not get burns. Casting your own using refractory cement won;t be nearly as insulating as those bricks they sell @ Ceramic supply stores. |
Reply |
Thread Tools | Search this Thread |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Forum | |||
Purchasing Furnace - 2-Stage Variable vs. Standard | Home Repair | |||
Replacement heating element for Heat Treat Furnace | Metalworking | |||
Electric element for aluminium melting furnace | Metalworking | |||
Furnace problems - repair, replace or ???? | Home Repair | |||
Furnace heating element | Metalworking |