About 1.2 mm they are definitely cutting disks (Makita brand). one difference between what I am doing now and what I have done previously is I bought a cheap cutoff mount for the grinder so I can get more accurate cuts. I doubt that would have any effect and no I am not running it too lightly or too heavily.
The angle is 3mm. normally I only cut sheet metal so that is another difference.
DadOfFan OP t1_isw6x5r wrote
Reply to comment by PsychoEngineer in dressing a cutoff wheel by DadOfFan
Same, that's why I was asking. I am starting to think it may be the cut off wheels themselves.