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Marvs method works exceptionally well. I can true a 4 jaw mounted part very quickly with it.
That part of it was very much a “game changer” for me. Actually I need to make a couple of short chuck keys just for even easier access.
I just read thru an alternate method of centering in a four jaw chuck by Marv Klotz. I'm sure that Marv's method works fine, except that it requires that I make a spring loaded center instead of the pointed rod that I already have. I think I will stick with the Jim Dunmyer method, because it works so well and doesn't require that I build anything more. Thank you Marv for your suggestion.
While you're making chuck keys, make some* that allow you to operate the jaws on your 4J and the scroll on your 3J using your electric screwdriver. For both chucks this makes the process of removing the jaws for cleaning much faster.
Quote from: mklotz on January 24, 2021, 03:28:08 PMWhile you're making chuck keys, make some* that allow you to operate the jaws on your 4J and the scroll on your 3J using your electric screwdriver. For both chucks this makes the process of removing the jaws for cleaning much faster.Thank you Marv!