i came across same problem about a month ago with a 14" rigid from HD and I had to lower speed by adding two other step pulleys which I found in my drill press. pretty much the way it works is from 1" motor pulley ran a belt to 4" part of the step pulley.on that same step pulley I used the 1" portion and ran a belt to other 4" pulley. It slowed down big time my only problem was finding belts to my needed lenght but I got close enough w autozone stuff. lucky for me I live 5 minutes away from paramount saw, they will make you any saw blade to your specs. it vibrates a bit due to more slack on one belt than the other . still needs refining but now cuts 1/4 steel like butter and all I had to is sacrifice my drill press. I any body is interested I can take some pictures
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