View Full Version : leadscrews and motors

11-16-2003, 12:23 AM
Hi guys does anybody know what the minimum holding torque is that I'm going to need to turn a 5/8-8 acme screw in a plastic nut of delrin or some other type of plastic ?

Also I thought I had read somewhere that if you used a longer thread in the nut that you wouldn't need an antibacklash design persay, that the threads would takeup or eliminate most of the backlash anyway .I realize that the longer the thread the more torque demand on the motors but does anybody know what the ratio of thread length to screw diameter would be to eliminate the backlash?

Thanks guys for your help Bob