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I am confused over readin soem of the responses to my previous posting on pulleys and rpm speed. When calculating, do I use od of pulley or something else? All I have is the od for each pulley.
My plan was to use a 5 inch pulley on the 1740 rpm motor and a 2 inch pulley on the jointer. Using the od numbers, this gives me a rpm of
4350. Right?The manual for this old jointer says to shoot for a cutter head speed of 4400.
BUT
It says with a 3450 rpm motor, a 2.5 inch motor pulley would equal the appreopriate rpm. (It does not say what pulley came stock on the jointer. When I got it from an auction it had a 2.5 inch pulley on the jointer but I have no way of knowing if that is stock or not.
After reading what someone said about pitch diameter being different than od, will I be spinning this thing too fast? Am I even supposed to go buy pitch diameter?
Any help is appreciated! I also have a 6 inch pulley and the 2.5 inch pulley. (Spares)