The Merrexx III screw design?available in sizes from 1 to 10 inches with L/D ratios up to 44:1?reportedly allows barrier-type screws to function as they were originally intended to but never could to ...

A screw is any shaft with a corkscrew groove carved around its surface and, regardless of their design, screws are usually used to fasten or squeeze two or more objects together.

When it comes to screws for injection molding machines, the term "general purpose" covers a wide range. Now one screw designer is calling for some standards.

Ball screws with external-tube return systems cost less to make than equivalent internal-deflector types but also have speed ratings up to 40% lower. (Speed rating by this definition equals the ...

Effective centers 1.5 times nominal screw diameter are usually enough. Figure 3 shows details of the fixed end of a screw, including hardware.