Wandering runout

[lobust]

I made the jaws. I had some 1045 2-1/4" square stock I cut them out of and didn't bother making them narrow to match the master. They are a good tight fit to the chuck and the nut is entirely within the master. Didn't occur to me that jaws could be too wide. Pie jaws are much wider and nobody seems to be bothered by that.

Nothing wrong with that, I've made plenty of jaws myself - it was just a flag that they weren't standard jaws as those are normally the same width as the masters.

However, you do have the outer clamping bolts outside of the chuck body, which isn't a great idea as it levers against the inner one if it's tight and promotes jaw tilt. Sometimes needs must, and if you absolutely have to have the outer bolt outside of the chuck body then it's actually better to leave it out altogether.

 

[Barbter]

+1 to threadmill to cut the vee. But decent carbide 2flute V (chamfer) tool will do the job okay (but slower).

 

[Spruewell]

The first image is a little deceiving. I think it's a matter of perspective that it appears the bolts are way outside the chuck body. The nuts are towards the outside but still fully within the master jaws to allow plenty of adjustment for re-machining the jaws. If anything, I might consider cutting down the outside of the jaws to reduce weight.