11-02-2012, 10:06 AM
I don't have any current shop projects going on, some fabrication for work, but I decided to post a project I did a few years back.
I have a Jet JVM 836 milling machine, everything I wanted, solid, small and well built. The only thing I didn't like was the limited number of spindle speeds, 5 speeds, 250 rpm to 1550 rpm. So I built a "transmission" to increase the number of speeds, built from stuff I had in my parts inventory, my cost was less than $50 of parts bought.
The "transmission" is nothing more than a extra layshaft and a another set of pulleys, it was made as an insert module, you pull the motor, insert the "transmission" then reinsert the motor. At anytime I could, in about 5 minutes, I could return the mill back to its original to configuration.
I have a Jet JVM 836 milling machine, everything I wanted, solid, small and well built. The only thing I didn't like was the limited number of spindle speeds, 5 speeds, 250 rpm to 1550 rpm. So I built a "transmission" to increase the number of speeds, built from stuff I had in my parts inventory, my cost was less than $50 of parts bought.
The "transmission" is nothing more than a extra layshaft and a another set of pulleys, it was made as an insert module, you pull the motor, insert the "transmission" then reinsert the motor. At anytime I could, in about 5 minutes, I could return the mill back to its original to configuration.
