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Comparison Sample Block of Surface roughness Product Description
This set contains standards for seven most important maching methods in the prevalent "AA"
Value. These Surface Roughness is used to compare and determine the degree of the surface finish by comparision method and eye estimation or magnifying glass
All 27 speciments are calibrated in u" AA (Arithmetical Average) and in the metric equivalents um Ra.
Classify and rough degree parameter as table
Turning
Shaping
Vertical milling
Plain milling
Plain grinding
External grinding
Polishing
um
uin
um
uin
um
uin
um
uin
um
uin
um
uin
um
uin
6.3
250
6.3
250
6.3
250
6.3
250
3.2
125
3.2
125
3.2
125
3.2
125
1.6
63
1.6
63
1.6
63
1.6
63
0.8
32
0.8
32
0.8
32
0.8
32
0.8
32
0.8
32
0.4
16
0.4
16
0.2
8
0.2
8
0.1
4
0.1
4
0.1
4
0.05
2
0.025
1
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