Excuse the title, I meant SX2
I've been thinking of changing the gearing that's in my (CNC'ified) HiTorque 3900. There isn't much data about the actual parts used, is it safe to run the spindle bearings at 4000-5000RPM? If so, all I have to do is modify either the spindle or motor pulley to match the other, I found a previous thread on the subject:
http://www.cnczone.com/forums/bencht...lly_way-2.html
There are mods galore for X2 mills, but it would appear that no one has reported about doing anything to an SX2. I do 99% of my work in aluminum, so if I really lose out on low-end torque, it's no real loss. (My biggest endmills are 1/2", I might use a flycutter on occasion, though I'm not afraid to add a secondary spindle to get some additional speed - I'd rather have access to my ATC and tool rack instead.)