I bought from mcmaster.com three 1” ¼ pitch ball screws in December. The sizes where 24”, 48” 60”. I just machined the ends of the 24” with not problems, but when I went to machine the 48”, I noticed that the screw was warped!!! So I then put the 60” in the lathe and it also has the same problem. Just to make sure I took them both and rolled them on a flat surface to confirmed the problem. I am going to call them to exchange do an exchange, but I am nervous it’s going to happen again.
Has anyone else have the same problem?