As a consequence of the need for miniature studs for the return cranks on the 8F I decided how hard could they be to make.
I started as I would make miniature bolts by turning down the end of a piece of 1.2mm nickel rod to 0.8mm at either end (to make two at a time from each piece of stock). Then I removed them from the lathe and popped them in a hex headed pin vice to file the hex flats on. If I did a production run which I may at some point I would have set up the spin indexer to make them all consistent. As it is they are okay but not perfect.
Then I came to put them back in the lathe to turn the short length of dummy thread which protrudes beyond the nut. This is where I started to struggle a little. Even though I had sharpened the cutting tool I was still getting a bit of deflection of the stock.
Then I remembered that just after Christmas in a Warco Sale leaflet I had bought a live centre with multiple interchangeable points.

This got me wondering if I could make another tip with a 0.8mm hole in it to support the tail of the stud while I turned the other end down to size before parting off.


This is what it looks like in the live centre. The taper isn’t a perfect fit but it’s under so little load that it isn’t an issue

For those struggling to visualise what I am talking about, I did a simple sketch

























































