For 1/2 inch about 35 psi oxygen should be good. A little higher won't hurt. Propane isn't as dangerous as acetylene, so the pressure can be higher without risk of an explosion. 15 Psi should be OK. As long as you can get the size of flame you want, the pressure is high enough. Use a propane 2 piece tip recommended for 1/2 inch thick material. With propane, the oxygen is turned a little higher than acetylene when setting the flame to get the hottest flame. The oxygen valve on the torch body should be opened all the way and the flame adjusted with the valve on the cutting attachment. It shouldn't take too long to preheat. Experiment a bit and you'll figure out what works best. Dave
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Today's Featured Article - Grain Threshing in the Early 40's - by Jerry D. Coleman. How many of you can sit there and say that you have plowed with a mule? Well I would say not many, but maybe a few. This story is about the day my Grandfather Brown (true name) decided along with my parents to purchase a new Ford tractor. It wasn't really new except to us. The year was about 1967 and my father found a good used Ford 601 tractor to use on the farm instead of "Bob", our old mule. Now my grandfather had had this mule since the mid 40's and he was getting some age on him. S
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