B axis bore thread dimensions?

azdavi...@gmail.com

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Mar 9, 2021, 7:31:36 PM3/9/21

to Pocket NC

What is the B axis bore Major diameter and thread pitch? Im making an adapter for a sherline chuck, which is super low profile for a chuck and can hold large pieces.

azdavi...@gmail.com

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Mar 9, 2021, 8:34:47 PM3/9/21

to Pocket NC

Best I can tell with calipers is its minor diameter is 2.040in, and the thread pitch is either 20 in one inch or 1.25mm. the 20 gauge seemed to fit slightly better. the thread is also truncated, so that makes it a bit harder to determine the major diameter. perhaps someone can measure the OD of the er40 collet chuck.