Originally Posted by
fietsbob
But a good Machinist can roll threads , they have to be tooled up for it.
My father was a retired machinist when he passed .. made Armaments for the US Navy.
True , the usual fork threading die is a cutting tool.
to the OP : just do the threadless conversion. thereby leaving steel tube wall thickness unchanged.
Quoting Alexander Pope said it perfectly, "a little knowledge can be a dangerous thing".
Knowing a bit about rolling threads, doesn't mean you know when it can be done (not on thin-walled tubes because they deflect) or when it's desirable or practical. In this case it simply isn't for more reasons than I care to repeat (see prior post).