Always Start From Stock as Close as Possible to Target Dimensions

The 7/8" OD Delrin arrived yesterday.   It was short enough to part into three pieces on the mill, then turn on the lathe to get a more perfect square and length.

The target length was 1".  It is not really all demanding on length.  Two of them ended up .953" and .957" long; the third .935".  If I really needed to do do, getting them all exactly 1.00" would have just been a time investment.   Machining involves asymptotically increasing investments of time for every decimal point you go to the right.