Quote Originally Posted by Tanky_Turk View Post
I don't want to cut wood with it, mainly engraving on wood or copper clad board/brass etc. and probably around .3-.5mm depth. I might occasionally cut 0.6-7mm thick brass with it as well but not sure about that yet.



This is the link: CNC SFU1204 Ball Screw L250mm Ballscrew With SFU1204 Single BallNut | eBay
Doesn't help much but either way it's definately 4mm pitch, Which will be fine for engraving.