View Full Version : help with DIN symbols

03-27-2005, 12:55 PM
Does anyone know what the German DIN machined surface symbols mean in microns?
They look like triangles

03-27-2005, 04:04 PM
The more triangles, the better the finish.

I used to generalize this way:
One = 250 finish (6.3 microns)
Two = 125 finish (3.2 microns)
Three = 32 finish (.8 microns)

This is a really rough guide, but you get the idea.