Originally Posted by
QuinnSjoblom
The chinese spindle will work great. I considered the same since i also have one, at least temporarily. If you gear it down 2:1 for 12k max, it will do pretty well at general machining with excellent power between 7k-12k and ok power down to 5k or so, but will still be kinda lacking at lower rpm. youll be able to get down to 3k, but even though torque is doubled, there was nearly none at that rpm to begin with. As long as you arent planning on drilling big holes, or running big endmills in steel, it should be a pretty nice general purpose setup. Maybe you dont need 12k and are gearing down even further. I went with servo drive for a couple reasons. Rigid tapping, gear hobbing, toolholder clocking, and decent torque all the way down to zero rpm without using a massive motor. There are drawbacks though. The chinese spindle you plan to use really packs a punch for its size when run at the right rpm. At the upper range of rpm, your setup will have about double the power of mine.