Revised Belt Drive System

Buffalo21

H-M Supporter - Gold Member
H-M Supporter Gold Member
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Feb 24, 2018
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Recently I bought from a member (Matthemuppet2), a intermediate shaft pulley assembly off either a mill/drill or a drill press. On the long drive home from Hutchinson, KS, I started to wonder what to use it for, so I decided to add another set of steps in the drive assembly system of the Rockwell milling machine, that I posted a “transmission build” on a while back.

This is a bolt on addition and nothing on the mill was permanently alter, I can go back to the original configuration in about 20 minutes. I‘m really interested to see what spindle speeds are achievable with this set up, current before the mod, the Rockwell mill had 24 speeds, between roughly 125 rpms to 6650 rpms, we shall see what speeds are achievable now.


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that's super cool! You should be able to get a bunch of speeds that fill in any gaps you had before, depending on how the pulleys are set up. There'll probably be some overlap, but this might get you some more accessible ranges. I know with my WT drill press that some of the speeds were a real fiddle fart to get to, due to where the belts were relative to each other.
 
with this set up the lowest speed went from 125 rpm to 37 rpm...... so far the speed variations are in much smaller steps, I’m not sure how viable this exercise is, but it is interesting.
 
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