Sorry for the off topic post, but the forum won't let me message you until I have ten posts.
I am researching blades speed for table saws and ran across a post you made giving a formula for calculating blade speed:
V=speed cuting (perimeter speed)
I don't understand the comma in the parenthesis: (D×3,14×n)
My understanding is you would multiply the diameter x 3 & the RPM x 14, but what do you do with the results of those computations: multiply, divide, add or subtract or..?