Thanks for the cams Miriam. It's amazing the minor and major variations the same mfr went thru on these. The ones you sent me, were for a little larger shaft. So what I did was made an adapter bushing from Delrin on my lathe. The rectangular locating tip was also a little larger, and I didn't do anything about that. They do seem as though they will work fine. A little snug getting them back out of the SM, had to use to paint can openers to grab and lift with.