I have been working on and off on a thread cutting jig for my lathe to use for boxes with lids.
Recently I got back to it and solved a problem I had with the chuck not turning concentric when on the jig.
The jig consists of a HF multi-axis vice, a set of 3/4-16 nuts and shafts all mounted on the lathe as the picture shows.
I use a 60 degree cutter mounted in the head-stock with a collet and draw-bar to cut the threads. The object is mounted in the chuck which is mounted and turned around the cutter with the 3/4-16 shaft.
Here is the results of the second attempt at cutting threads in a box and its lid.