I'm now thinking the recess in the bottom of his pulley is due to ware, but I am not positive. He did install a set screw in the side of the largest slot
But your right it is working and has for over 30 years. I am hoping to find a version of the original metal pulley.
I just checked it out closer. It simply slides on from the top. My grandfather simply made a straight bore with recessed bottom bore to receive the larger bearing/ bushing on the bottom of the shaft which slides up and down on the splined shaft. He then drove steel pins into the splines to keep...
I looked at my old pulley and the only marking is the "made in USA" The top is .51 and .63. The bottom is .82. My guess is there is some ware. I forgot to check the depth. I think it may also started out in life as a 4 step pulley.
This was my grandfathers mortiser. The 4 step pulley broke so he made one out of oak that he glued up and turned on his lath. Any help in finding a new pulley would be greatly appreciated.