Originally Posted by
Toolmaker51
3M
Have total respect for them. Best evidence of 'you get what you pay for'. Anything they produce performs well, and sets standards for other companies.
I'll use the grade and specs for the flap wheels for US equivalents, especially squared edges.
In your video's, they're always spinning, couldn't tell if bonded abrasive or what, never saw flap wheels work so aggressively. All of ours seem rounded off, so while they do sand/ grind, it's not what I'd call metal removal.