How to prevent grub screws from damaging outer diameters

[thehomeengineer]

If suitable brass is not available there are other options. Lead bird shot, available from reloader suppliers in the USA, or lead split shot available from fishing gear suppliers work well as do spent air rifle pellets.

Still, wherever possible, milling/grinding a flat on the shaft where the setscrew seats is a better solution.

Hi Marv
Last Night I finished machining the fabricated shaft for the ring roller I am currently working on.http://www.homemadetools.net/forum/f...g-roller-66702
As, this is the drive roller shaft there are two keys machined into it. One to drive the die and the other for the turret hand wheel to rotate the shaft/die. As the key locates the die but does not lock it along the shaft, I do not want it to move when in operation. Therefore, I have machined a flat the opposite side to the key for a grub-screw to clamp against, knowing then the orientation for the key has set the grub-screw to the flat. Therefore, no chance the grub-screw can damage the outer diameter of the shaft. UNLESS (the key is not present or the grub-screw is overtightened deforming the flat section to encroach to the shafts diameter.) Can not design out “total stupidity” completely lol
Thank you again for viewing and the posts you submit
The Home Engineer