Quote Originally Posted by G59 View Post
Out of curiosity, was that 8000rpm spindle driven 1:1 by that motor?
A 3 hp spindle has no problem doing a 0.25" DOC at full WOC, with a 2.5" face mill in 4140. Even less trouble in mild steel.

Here is a pic of the motor:

Attachment 270098

Pulley setup:

Attachment 270100

Full build thread is on the zone here:

http://www.cnczone.com/forums/vertic...49951-cnc.html