Surface comparator scale VDI 12 to 45
One of the most important parameters for spark erosion treatment is the surface quality.
The surface condition can be determined on a workpiece which is still clamped, simply and quickly using our comparison standard.
Twelve different comparative samples enable a precise determination of the surface quality whereby the values achieved can be read off directly over the fields.
- Roughness classification 12 to 45 in accordance with VDI 3400
- Arithmetic mean roughness value Ra 0.4 to 18