About 30 years ago I helped clean out an old factory with my only pay being that I could save anything I wanted from the dumpter. I came across a few these laged hinges and thought what could I ever use these for. So naturally they followed me home. In all those years I only found a use for one of them, it is holding a motor for one of my band saws. Works good, to change the belt all I need to do is lift up on the motor, the weight of the motor keeps tention on the belt and several different sizes of belts could be use with out any adjustment.
Anyway, I was cleaning out a shed and came across them once again. Since I have only used one in 30 years, I thought I would keep one more in case a need would arise and sell the others on Ebay. They were all stiff so I oiled them up and put them in a vice to work them back and forth with a wench. Two of them freeded up OK but the last one only had a limited movement. When I used a little more brute fource it broke. It may be hard to see in the photo but where it broke the metal is nice and shiney and looks christalized. The outside of the hinge is oxidized to the color of lead. The metal is non magnetic, and heaver than Aluminum. So any ideas what type of metal this is Zinc? There seems to be a steel hing pin with ( babit?) poured around it. Iseem to remember something about the hinges had to be made out of something that was " non sparking " for some reason. Gary P. Hansen