3 replies to this topic

[kasper]

does any one here own or have used a johnston forge/furnace#133 any infoe would be great thank you in advance.Cheers....Dave

[finn;-)]

They are nice if someone else is paying for the gas;-) They are hogs, and not terribly efficient, BUT if you are feeding a good sized power hammer, they are pretty nice. Not super hot, but useful in the right situation. Johnson sells an adapter, to change the orifice from NG to LP, its 60$, or you can silver solder over the NG orifice and then drill it out smaller cause the LP is almost always at a much higher pressure. Most people who have them almost never use them, unless they are doing some production forging with a goodsized hammer, or pre-heat, postheat on welds...

[arftist]

Finn is correct, gas hog. I have a 122, converted to propane. It is great for big runs, many irons in the fire, so to speak. For making small parts with many repeated heats of a single item, it is very expensive to run.

[monstermetal]

Yep... what everyone else said.. I have a 133, I have no problem getting it hot enough to melt steel running on propane but it uses a tremendous amount of fuel... It could easily burn $75-$100/day worth of propane. I use it for large items or sheet work but would not consider using it as a "every day" forge