Mill Transmission
#1
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.


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.jpg   mill transmission 001x.jpg (Size: 47.17 KB / Downloads: 128)
.jpg   mill transmission 4 025x.jpg (Size: 51.22 KB / Downloads: 123)
.jpg   mill transmission 4 005x.jpg (Size: 48.81 KB / Downloads: 123)
.jpg   mill transmission 4 001x.jpg (Size: 47.82 KB / Downloads: 122)
.jpg   mill transmission 005x.JPG (Size: 46.39 KB / Downloads: 123)
.jpg   mill transmission 4 037x.jpg (Size: 48 KB / Downloads: 123)
.jpg   mill transmission 4 048x.jpg (Size: 47.27 KB / Downloads: 123)
jack
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#2
Jack,

Nice job on the transmission. What's the speed range after the conversion?

Ed
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#3
Ed,

25 speeds, from 48 rpm up to 1550 rpm. with much smaller steps between the speeds.
jack
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#4
Hi
Jack
Very neat
You cant have too many spindle speeds to play with
John
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#5
Very nice project!! Interesting post.
sasquatch, proud to be a member of MetalworkingFun since Jul 2012.
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#6
Jack,
Looks like you did another great job Smiley-signs107
Smiley-eatdrink004
DaveH
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