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Can I move 300 pounds with a .5 lead ?

Can I move 300 pounds with a .5 lead ?

Can I move 300 pounds with a .5 lead ?

(OP)
Hi group

I`m hoping someone in the group could help me. I am a woodworker building a 3 axis CNC machine. I have my frame constructed with a moving gantry design. I currently have a 5/8 diameter ball screw with a length of 67 inches. Both ends are fixed to double bearing assemblies.
My stepper is capable of running at 1100 rpms. At this speed and even below I am getting screw wipe. I plan to upgrade to a 1 inch diameter ball screw with a lead of .5. I am hoping to increase my traverse speed by changing the lead.I`m uncertain if the change in lead may cause problems moving the gantry. With the .2 lead and a 1200  oz*in stepper I was able to move 300 pounds of steel at 240 ipms. I hope to run my .5 ball screw even faster.(ipm)
 Since I am losing mechanical advantage by moving to a .5 inch lead I am concerned the stepper may not be able to move the load.
PS..the supplier has no speed and torque charts
http://www.cnczone.com/gallery/showphoto.php/photo/983

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