I have a taig mill that I have converted to a 4th axis machine. I was planning on using it to cut keyways and potentially some rifling by mounting a boring bar tool holder to the z axis dovetail then using the x and a axis for indexing and y axis for depth of cut. I've figured all the logistics out to make it happen but now I have hit the wall in my knowledge. How much force would be necessary to perform a decent single point broaching operation in stainless steel? what size steppers would I need to use in order to gain the necessary force?
I've attached an example of what I'm basicall trying to accomplish in steel below. My practice piece turned out great but now i want to move into hard metals as cheap as possible. I know the taig is not the ideal platform for this type of operation but it's what I have and I will do what it takes to make it work.