-Comparison sample block of surface roughness is a measuring too which is used to check the snooth finish of a mechanical workpiece by comparision method and eye estimation or microscope is uesd to compare an detect the degree of the surface roughness.
Method
|
Turning
|
Shaping
|
Vertical milling
|
Horizontal milling
|
Plain grinding
|
External grinding
|
Plating lapping
|
Nominal value of surface roughness(µm)
|
|
|
|
|
|
|
0.025
|
|
|
|
|
0.1
|
0.1
|
0.05
|
|
|
|
|
0.2
|
0.2
|
0.1
|
|
|
|
|
0.4
|
0.4
|
|
|
|
|
|
0.8
|
0.8
|
|
0.8
|
0.8
|
0.8
|
0.8
|
|
|
|
1.6
|
1.6
|
1.6
|
1.6
|
|
|
|
3.2
|
3.2
|
3.2
|
3.2
|
|
|
|
6.3
|
6.3
|
6.3
|
6.3
|
|
|
|