"Steve Lusardi" wrote in message
...
That is not a shear pin. It is an assembly pin. I have made many drawbars
and I have tried turning them from solid bar. This usually fails unless
the steel bar has been totally normalized (annealed). Even with a follower
rest, the bar bends as its diameter is reduced. So, it is much cheaper to
pin a Hex on a piece of hotroll bar and thread the other end. Normally a
solid straight pin around .150 is used.
Steve

Thanks.