PM-30 Spindle Speed

[WV Dualsport]

I have a PM-30MV converted to Centroid CNC.

Has anyone attempted to reduce the accessory (spindle) pulley diameter to generate more useful RPMs? I am aware that the Spindle bearings are not designed for true HSM, but an additional 1000 rpm(4000 max)would be useful in many applications using small diameter tooling.

 

[Bob Korves]

Go with it if that is the work you do. However, you may get into bearing trouble at higher rpm's, so you might want to research that...

 

[fursphere]

Agreed. Watch out for the bearings. I have a PM-30MV-HS (High Speed) model. When I bring it up to around 3000+ RPM it sounds like the upper spindle bearing is starting to make a little noise. So I just run it slower for now. I haven't pulled it apart to inspect things yet.

Its supposed to be able to hit 4000 RPM stock, but I haven't tried.