I have to grind down some welds. Normally, I just use a stone disk on my hand-grinder. Is it better to use an 80 grit flap-disk instead? If so, why?
Are you talking about grinding welds on sheetmetal ? If so I really like te flap discs . They do a much smoother finish than a grinding wheel plus quicker if your welds are not humped up high or real rough , to me they do not generate as much heat and cause warpage as a rock .
Flap discs are for smoothing out welds. The stones are more for removing the welds. I had to smooth the welds on a motorcycle frame for a guy before I painted the frame. It looked awesome. -Josh
use 240 2inch disk then scotch brite depends on the welds what are you grinding on? Im a parts finisher (shaggyfinisher) at a machine I grind,buff and polish medical parts so it has to be perfect work your way down from 80grit to 240 then blue pad to finish will be smooth as babys butt Steve
