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  #11  
Old 12-27-2020, 10:22 PM
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Originally Posted by USMCPOP View Post
I have a Rockwell like that. Big pulley is appx 7" OD, small one about 3" OD. Can't see the motor RPM offhand as it's stuffed in a corner behind a 2,400 lb vertical mill.

I got it off Craigslist for free, never ran it.
With a 7 and a 3 and a 3600 rpm motor you get 8,400, way too fast. With a 1120 rpm motor you get 2613. Way to slow. A jointer needs to run between 4500 and 5000.
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  #12  
Old 12-28-2020, 04:46 PM
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Originally Posted by milomilo View Post
With a 7 and a 3 and a 3600 rpm motor you get 8,400, way too fast. With a 1120 rpm motor you get 2613. Way to slow. A jointer needs to run between 4500 and 5000.
A normal 1725 would give him 4025
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  #13  
Old 12-28-2020, 05:23 PM
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a normal 1725 would give him 4025
oooppppsss typo on my part!
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  #14  
Old 12-30-2020, 03:22 PM
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All finished up now. As often happens with me, my thrifty gene was in high gear and I was determined to use my pulleys and my V belts and spend no money on this project. After 6 days of dicking around I broke down and bought a 2"OD 5/8" bore pulley. The 12" pulley had bad out of balance vibrations so decided to start all over with the pulleys. Cuts real nice now. I also adjusted the blades and reset the tables too.
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Old 12-30-2020, 09:47 PM
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Forgot to mention that I am at 5220 RPM.
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