I don't have a rotary table at my disposal so I'm looking for some ideas for building a radius jig to machine radii on the ends of flat bar . I have a few ideas in my head as follows ,,, It would be a rotating affair with a base that can be held in the machine vice or clamped to the mill table .And a swivelling top piece with slots or tapped holes for clamping work pieces on. Maybe have an adjustment to be able to machine differnt radii on varoius sizes of flat bar and would be rotated by hand using a lever type handel against the end mill cutter.The end of the bar would be ground close to size before using the mill so only light cuts would need to be taken.
I dont want to re-invent the wheel if some one has already done this. Thoughts and comments welcomed.