Master key – precision chuck.

[mgjParticipant @mgj]

John – yes thank you. That is a very good old wheeze. I seem to remember reading it in The Amateurs Lathe by Sparey in around 1980 when I bought the lathe. Tubal Cain also mentioned it in some publication – perhaps the First Edition of the model Engineers handbook.

Poor man's Griptru, and it works well. Best, for repeatability if you always use the same socket to tighten.

[Author]

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