I’ve played with a couple of Longworth designs and decided to make my own variation to fit better with working with a rotary:
- The buttons/jaws of the chuck are locked in place with nyloc nuts, adjusted to where they are snug but move easily.
- Modified the edge to make it easier to turn as well as giving a little bit of leverage to tighten the chuck.
- Locking is done with a separate clamp for the entire chuck, rather than each button being tightened. This makes it a lot quicker and easier to lock rather than tightening each button. Plus, I couldn’t find any M4 sized knurled bolts and wing nuts.
- I haven’t made the mating piece for the live center, but other than the size of the center hole, it’s the same design.
- There is a lot less mechanical load with a laser rotary than a wood lathe, so this “should work”. Time will tell.
longworth.lbrn (519.0 KB)
https://www.amazon.com/gp/product/B07DVS4N91
https://www.amazon.com/gp/product/B004FTPWKK
(upload://1V06o5N01Wn4Cea1aS1I90MsNIn.lbrn) (519.0 KB)
