I need to prepare many weld cross-section macros - tens per Company - in meeting a new European legislation without requiring the steel fabrications companies (FabCo's) to change their welding machines.
Many FabCo's have a big belt-linisher - which is useful for a first linish, where it's available.
File and use coarse and fine emerys as in welding school is a bit slow.
What would you do if you were "the expert" and were walking into FabCo's sorting out all this for them?
I have a 4inch air-powered angle-grinder. Would that be good with a linishing disk? How do you rapidly switch between linishing disks? Is there some system where you rapidly demount the backing disk (flexible(?) with its pad???
A few hundred grit final light grind / linish results in a perfect macro-etch.
I have a reducing valve which plugs into standard airlines. Then plug your air-tool into that. The regulator / reducing valve - it gives me very accurate control of air-tools in general. So I can slow down and control the torque of tools. (eg "tickling off" the sharp edges of fatigue-test samples so you are fatigue-testing the weld itself not the sharp edged and notches of the sample which are not part of the in-service weld, etc)
I see there are "pistol-grip" air-powered sanders / linishers. "Roloc" is mentioned in some.
There's no need for a "random orbital motion" (???) Can readily alternately grind in one direction then at its right-angle-direction.
Sorry about how broad questions are - have no experience of this matter...