I was close, but not exact. I would assume it was for a hand powered saw, like a big buck saw and not a power saw. Glad to see you are going to keep it up nice and not junk it out. I am a little nostalgic, but I have to have it running to be completely happy. It does not have to cut wood, just run so I know it is still "alive". Course my garage looks like Ft Lauderdale, there all alive, but you would think they are dead from looking at them!