AJUN 740 by
Skip Albright, on Flickr
so I have some older line shaft and pulley stuff, it's cool but puzzling.
none of the measurements are what I might call 'standard"
I really dont think they are metric, but they are odd.
pulley pictured is 12 and 1/16 in diameter the width is dead on 3 inches, but the bore is 1.175, not quite 1 1/8
I guess some of the oddnes could be rust, but I have several different parts and all are not "quite" right.
Is this like the SAE bolt size thing from the 20's?
or were there proprietary sizes for different companies?