I like this chuck idea. Most big 5 axis set-up have this chuck mounting option.
I own a watchmaker lathe, and being able to combine components is nice.
What is nice about those 3 jaw self centering chucks for watchmaker lathe, is that they are fairly low profile.
That gives you more work envelope in this context
This looks like a Sherline chuck. It is operated by turning the knurled ring using small rods inserted on the side.
They come in different mounting options, as per back thread.
Now, what would be nice is to have a mounting plate that is mounted on the PocketNC plate using pre-drilled threaded holes.
I guess the best way to do this would be to CNC the fitting in place, and for ultimate precision, mark position (index)
This would offer self centering set-up for any part analog to lathe jobs, with +3 axis bonus.
I believe brass would be hard enough for this job.
Question is, could the thread be cut on the PCKNC?
Some older watchmaker chucks, like Levin, made such chucks with 3 screw back plate, but they are more expensive and have to be picked from Ebay...
The best thread option would be 3/4-16, as other threads are finer. Attached drawing.
Last word: I have been watching PocketNC since their Kickstarter launch.
I checked every week for their blog update.
I have been in contact with them.
I have looked for reviews and videos about the performance of the machine.
Have not ordered yet.
But let me tell you that after checking this forum, I am ready to order.
This small company is just a nice story.
And then, on top of that, husband and wife are driving it.
And like its not perfect enough, they have a new baby in the the midst of it.
My hat to this couple ! Nice job.
Martin de Blois