A while ago I found a beautiful hand lever operated quick collet chuck on the used marked and had to buy it. Even if this chuck cost me as much as I payed for the whole lathe a few years ago.
This chuck from the German manufacturer NANN allows to clamp or unclamp the workpiece while the machine is still running. That is a very special and handy feature.
When I got the chuck it seemed to be absolutely unused. However I first had to find out how it works. There was absolutely no movement in the chuck. I figured out that the chuck was totally stuck and glued together with old grease and gunk. I had to disassemble everything and carefully clean all the parts. But the inner sleeve which clamps the collet remained extremely tight and didn't allow the chuck to work probably. The reason for the too tight fit remained unclear but I had to relap the inner diameter on the chuck body so that the inner sleeve moves freely again. With this fixed and the chuck ready to work again, I had to make an adapting flanch to fit the chuck to my machine. In addition to that I had to make a bracket which holds the clamping hand lever.
After all this is done I have a very nice new accessory to my Mini Lathe machine.
I hope you enjoy this video.
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