Now that the stepper controlled dividing head (qv) is commissioned I need to manufacture a milling spindle to cut the clock wheels and pinions.
I purchased the cutters 4 years ago (thinking then that I was much further advanced than I even am now!) from Thorntons and both the wheel and the pinion cutter have a 7 mm bore.
Therefore it seems that all I will need is a 7 mm shaft with suitable means to clamp the cutters, mounted in ball races (and I just happen to have 4 races with a 7 mm bore in a box of junk) with a pulley on one end, the whole thing to be mounted on a vertical slide or even the topslide mounted vertically.
My question to the NG is, can I just turn up a shaft from mild steel or from brass, both of which I inherited quite a bit in the junk box I was given, or do I need to use tool steel and then harden the shafts? it seems to me that in the first instance because I only have one clock to make, that a mild steel shaft would be more than sufficient and that if I then get the clock-making bug still further then I can think again about a more sophisticated shaft.
Certainly I could suck it and see, but I have an in-built neurosis not to go several weeks down a path and then to have to start again.
So, is mild steel OK for this, please?