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Kram
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Not the handheld ones, but the bigger board type work very well, although they require a very strong power supply. For heavy use like melting, the coils need watercooling, but for heating boits that is unnessasary.
If its for bolts and stuff, I imagine a small board type would be adequate, this sort of thing, make up some welding lead cables.
My one is the bigger board with 6 mosfets and about 12 capacitors like this
I would say 21v and 20a is a minimum for this kind of thing, too low and it stops resonating and lets the smoke out. For short runs it will be ok from a power tool battery if you monitor the battery voltage.
My power supply for it is 48v at 52A or something silly, about 3kW.
Stuff you have made today
Nah, don't have one of them ;) Roller for hauling over a boats side?
www.mig-welding.co.uk
If its for bolts and stuff, I imagine a small board type would be adequate, this sort of thing, make up some welding lead cables.
My one is the bigger board with 6 mosfets and about 12 capacitors like this
2500W 50A 12-48V Induction Heating Board ZVS Module High M2E1 | eBay
Maximum Working Current: 50A (2500W Type); 40A (1800W Type). Maximum Working : 2500W/ 1800W (Optional). 2500W: 240 120 80mm / 9.45 4.72 3.15in. 2500W: 34 13.5 10cm / 13.39 5.31 3.94in.
www.ebay.co.uk
I would say 21v and 20a is a minimum for this kind of thing, too low and it stops resonating and lets the smoke out. For short runs it will be ok from a power tool battery if you monitor the battery voltage.
My power supply for it is 48v at 52A or something silly, about 3kW.
marlinspike
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We have one, forget which brand but it's well known, Sealey maybe. Was about £300 a few years ago. Haven't used it a great deal but it has removed several nuts and bolts that I think would otherwise have had to be drilled out.
