How to make Lead Screws work

[mentorDon]

Originally Posted by jman4747

Manufacturers often have papers like this to help with using the products.
http://pic-designcatalog.com/images/.../section_3.pdf

http://www.sdp-si.com/D810/PDFS/Ball...l%20Inf o.pdf

There is some excellent information in the PIC design catalog pdf. I would also suggest to make your design using the screw in 'tension' instead of 'compression'. If your design forces are compressing the screw, use the MAXIMUM COMPRESSION LOAD vs. LEAD SCREW LENGTH graph on page 3 to determine buckling limits. As an example, using a 3/8 dia screw with a force of 100 pounds, the maximum screw length using the 'A' method (fixed - free), is about 12 inches.