Thanks for the reply, Mike.
ID is not critical for this application, except that we need to get the wall thickness to its minimum point for weight savings. We can rebore a tube if necessary, and it's still going to be cheaper than boring a solid bar.
At this point, I'm still in the conceptual...
I'm working on reducing the cost of a torque-tube that is machined and hollowed out from 17-4PH round bar stock. The existing design has 1.5" OD with 1.22" ID. Part is appx. 15" long.
Preferably, I'd like to keep my OD the same and change to a material that has equivalent or better strength. I...
