Help - Machining slim rod on the lathe

[Brian]

As the Irishman said if I was going there i would not start from here.

But if I HAD to try this job
1/ start with 4 mm rod.

2/ drill and tap the thread first then slowly take the od down.

3/ use a collet and keep the work close

4/if a collet is not available make a split bush and mark its position in the chuck

5/ the screws are probably only to retain the wheels so could be smaller.

brian.