derived some useful techniques. Some future young members
might incorporate in some innovative experimentation.
It was like stepping into a time-machine
and going back to the 1955 machine shop but with a classy and
pleasant-soul machinist.
The video "Turning Bronze Bushings and Pressing them in Place"
demonstrates the use of expandable mandrel ( and expandable reamer )
that could prove useful for machining thin inserts/sleeves/separators, etc.,
in tubes ...e.g., sleeving/reenforcing aluminum tube with thin Ti/stainless for example;
concentric flow through circumferential coils when 5 degree CNCs are beyond budget.
<< https://www.youtube.com/watch?v=C5HKiKcoONc >>