Screw on lathe chuck security.

[olderdan]

Thanks Paul,
I have to use a rear tool post on my lathe (South Bend) as the front of the carriage has a tendency to lift off the bed under load with an upside down tool. It was obviously designed so the normal cutting forces keep it down.
I have watched some of Joe Pieczynski's video's, he certainly knows a thing or two.
Olderdan