Page 851 - 21-036 APPLITEC catalogue.indb

Calculation formulas for cutting data

Theoretical surface roughness and surface qualities

2
d - f z ²
d 1 1
Surface roughness in the R th,vf = - · 1000 μm
2 √ 4
direction of feed v f

2
d - ae 2
d 1 1
-
Surface roughness in the R th,ae = 2 √ · 1000 μm
infeed direction ae 4

Surface qualities

Maximum roughness values Ra in μm; 1 μm = 0.001 mm
3.2 1.6 0.8 0.4 0.2 0.1
Roughness classes
N8 N7 N6 N5 N4 N3

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