Thermolyne Heat Treat Oven Issues

[deakin]

my control took a dump on my thermolyne and burnt out one of the elements. i had two new spares but not one to replace the bad one. my furnace looks newer than yours and my elements are obsolete. i found one only on ebay but that got it back working. i put a pid in mine at the same time

 

[walterwoj]

I've been searching the interwebs and found THIS. It would appear to be the right physical size and ohms for my oven.

Rated Voltage/Power: AC220V 3000W / AC110V 750W; Resistance: 15-16ohm.
Wire Diameter: 1.2mm/0.047"; Coil Diameter: 7.2mm/0.28"; Length: 800mm/31.45"

My oven takes 2 loops at 26" each (13.5" one way) in series so stretched it should fit and it is within the ohm rating I'm looking for (~15 ohms for ~15 amps draw). Unless you guys have a gotcha I missed I'm going to order it. My main question is: Can I weld the leads from the old element (see pic) onto the new one with my MIG welder?

 

[pontiac428]

You can weld nichrome to steel just fine. Makes a nice weld.

That element looks awful small for your muffle furnace. I'd expect to find a minimum of 8 passes in the chamber on one that size. It's certainly the case on newer Thermolynes.

 

[walterwoj]

@pontiac428 There are 2 of those elements in there so that makes 4 passes. the new element is going to be 4 passes too. I'm glad I can weld that wire.