About 3 weeka ago, I bought a tailstock quill with the feed screw ahd
handle on ebay. Good deal, $36 US.
I received it this week. There was some scoring in the quill,
nothing a reamer cannot remove.
The quill was in much better shape than my old one.
For the old one, I manufactured a new feed screw, based on the
machinery handboook dimension: 1/2" -10 LH Acme thread. I used as
template a 1/2-10 RH screw that I machined with a nut finished with a
tap as template. This screw matched within a few thou the pitch
diameter measurement as per the spec in the machinery handbook.
When I tried to fit the new old quill in the tailtock, the screw
would not fit the inside thread.
I measured the thread from the new screw I got, comparing with the
one I made: surprise, the pitch diameter on the original SB screw is
0.01 in dia smaller than the one I made. No, there is not any wear,
hte screw is tight with the Quill.
Anyone of you ever had any other observations on South Bend and
I am curious becausde I have to manufacture a new cross feed screw.