Quote Originally Posted by j2sip View Post
Thank you so much for the reply. Good to know they're more than enough for the job. But one of my concern now is can the combination of screw/motor/driver drive that heavy gantry? I believe 5mm is the equivalent lead of the acme screw.
Don't worry 36Kg isn't heavy at all for a gantry and those motors will move it no problem. If the screw is 8 turns per inch The lead of the screw is 3.175mm but you have 4 starts so that is 3.175 x 4 =12.7mm or 1/2" pitch. This is a nice pitch for a wood router and will give rapids in the region of 10Mtr/min. (390in/min) or above.
You'll rarely cut at this speed so will have more than enough torque when cutting.