Heater Element

Re: Heater Element

feeds@yuku.com (glassfisher) — Thu, 29 Jan 2009 23:17:39 GMT

franklin wrote:
Thank you all for your input.

Galssfisher, what did you pay for your heater and what did it include?

Thanks again

Paul

Sorry for the late reply, it was a little over $100 for the element, cntroller and a few feet of high temp wire.

Re: Heater Element

feeds@yuku.com (BigTJ) — Tue, 27 Jan 2009 18:44:20 GMT

Ditto. These ovens are really safe though. much safer than say a home fireplace or space heater. The exterior of my oven is close to outside ambient temperature, the inlet and outlet sides are made of sheet metal which can't catch fire.

That all being said, I have a fire extinguisher at the ready, run it outside, and never, ever leave it unattended.

-John

Re: Heater Element

feeds@yuku.com (canerodscom) — Tue, 27 Jan 2009 18:27:51 GMT

Good point Phil. My oven stays cool to the touch on the exterior. The heat gun is connected to an outlet all alone on a 20 amp breaker. Fire extinguisher is 12 feet away and on the way out the door.

Harry

Re: Heater Element

feeds@yuku.com (HERMES2069) — Tue, 27 Jan 2009 16:23:10 GMT

I hope you guys out there are building these ovens with safety in mind.
We wouldn't want to hear about the Pre Fire days.
Phil

Re: Heater Element

feeds@yuku.com (canerodscom) — Tue, 27 Jan 2009 16:20:36 GMT

John,

The light bulb dealie might work. Thanks, I'll give that some thought. Managed to get it set at about 165* and held that steady for an hour. That worked plenty well to heat set the Urac.

Harry

Re: Heater Element

feeds@yuku.com (BigTJ) — Tue, 27 Jan 2009 15:46:20 GMT

Harry,

Thanks, as usual, for taking the time to give me feedback. I was wondering, would a lightbulb retrofit work for your 160 degree set-up? A couple 100 or 150-w bulbs would probably get you there, you could mount them inside spare end-caps.

BTW I insulated the heck out of my oven, I have a 3" duct inside a 6" duct inside a 17" by 17" wood box. The box is lined with tinfoil and stuffed with insulation, I put a whole roll of it in there. I followed...

Re: Heater Element

feeds@yuku.com (canerodscom) — Tue, 27 Jan 2009 09:52:31 GMT

John, (BigTJ)

Though I would discourage no one from using a mica strip heating element, I have moved away from them. After I burned out my third mica strip I decided to build a heat gun oven. Once it reaches equilibrium, temperature from one end to the other varies no more than 6* F at 375 or so. For example, at far end the temp will be 377*, in the center 375*, and nearest the exiting air, 371*.

Rather than post a tutorial on how my oven is built, let me just give some...

Re: Heater Element

feeds@yuku.com (HERMES2069) — Tue, 27 Jan 2009 07:48:50 GMT

I use a double wall insulated flue , end caps, 10", with a Mica strip heater. I use an immersion thermostat to control it. simple and very accurate.

Re: Heater Element

feeds@yuku.com (BigTJ) — Mon, 26 Jan 2009 23:13:56 GMT

Oddsnrods,

Thanks for the feedback and information. I agree all that matters is the results, who cares how you get there. I get good results with my heat gun oven so far as long as I flip so who cares. Would be nice to have an oven with even heating but can do without it for now.

Re: Heater Element

feeds@yuku.com (oddsnrods) — Mon, 26 Jan 2009 22:05:35 GMT

John , 375 degrees for 4 minutes then turn and repeat. The candy thermometers vary between 5 -10 degrees between them , as the unit warms the temp settles down and there is less of a difference between them. As I mentioned, when I started out I worried about all of those little details - maybe one of those zero deltas was one of them. The heat is rushing all about the place in my oven, when heated the strips are easy to work on and do not scorch or darken. One pal of mine made his own oven...

Re: Heater Element

feeds@yuku.com (BigTJ) — Mon, 26 Jan 2009 14:45:57 GMT

oddsnrods,

What is your temperature delta on that oven? I have yet to measure a heat gun oven, even the McAulntny oven (the one heavily insulated) with less than a 20-degree delta, and the others have a 30-40 degree delta. The one oven I measured like yours had a temperature delta of 45 degrees. I am measuring the temperature with an extremely precise thermocouple not a dial thermometer.

I built a McAulntny style oven 3 weeks ago, the write up said zero degree delta, I...

Re: Heater Element

feeds@yuku.com (fishbum) — Mon, 26 Jan 2009 10:52:46 GMT

Mor Electric Heating Assoc., Inc
http://www.morelectric.com/index.htm

Another source for heating supplies. Nice folks to work with.

fishbum

Re: Heater Element

feeds@yuku.com (Parahopper) — Mon, 26 Jan 2009 09:21:41 GMT

I got an email from Judy Moore at Youngblood Automation (she used to be with Grand Technologies), and they are still carrying the S1J54AS1, price is $72 + ahipping.

Re: Heater Element

feeds@yuku.com (oddsnrods) — Sun, 25 Jan 2009 20:55:42 GMT

When I was new to all of this rod making I sweated the mica heater details, then I found the plans for the very best hot air oven, from the Planing Form,have not considered the mica route since. Mine is insulated, works amazingly well and cost less than $60.00

Re: Heater Element

feeds@yuku.com (franklin) — Sun, 25 Jan 2009 14:50:15 GMT

Thank you all for your input.

Galssfisher, what did you pay for your heater and what did it include?

Thanks again

Paul

Re: Heater Element

feeds@yuku.com (glassfisher) — Sun, 25 Jan 2009 13:35:00 GMT

Grand Technilogies is now Youngblood Automation, phone 616 245 4111. I placed an order 2 weeks ago and the shipping/service was excellent. Even though it appears that the ownwership has changed, they still know the part numbers when you call.

Re: Heater Element

feeds@yuku.com (flyman) — Sun, 25 Jan 2009 00:29:01 GMT

I got this from Tony in November for a mica strip heater.

--> It is A-Teck in Tulsa
--> 1 800 225 6102
--> Ask fot Jim Cox and tell him what you want to do.

Larry

Re: Heater Element

feeds@yuku.com (aparramoure) — Sat, 24 Jan 2009 16:45:03 GMT

Parahopper,the phone has been dis connected, with no further infor.

Re: Heater Element

feeds@yuku.com (Parahopper) — Sat, 24 Jan 2009 15:41:49 GMT

I ordered a 5' 120v, 650 w strip heater (part # S1J54AS1) from Grand Technologies, Inc. in August. Their number is 616 575 9120. They knew exactly what i was using it for, and also recommended a thermostat (part # 5320-175). Together they ran me about $150 including s&h.

Trey

Re: Heater Element

feeds@yuku.com (BigTJ) — Sat, 24 Jan 2009 13:30:34 GMT

I looked at cattanach's book it says 650 w for good heat up.

I know you can get those Mica heaters. I think Harry Boyd (canerodscom) knows where.

Heater Element

feeds@yuku.com (franklin) — Sat, 24 Jan 2009 02:56:38 GMT

Hi All I am going to be building a heater cabinet for Heat treating and was wondering if the following heater would work? This is what the catalog says; Easy-to-Wrap Heat Tape with Temperature Controller This flexible constant-wattage heat tape is chemical and moisture resistant. It's made of braided wire elements wrapped in fiberglass and encapsulated in silicone rubber. Perfect for bending plastics, thawing frozen pipes, and applications requiring rapid heating. The attached controller...