VDws
Sph
Ra
Grade
Maximum Diameter
mm
Ball Dia. Variation
μm
Deviation From Spherical Form
μm
Surface Roughness
μm
3
12
0.08
0.08
0.012
5
12
0.13
0.13
0.02
10
25
0.25
0.25
0.025
16
25
0.4
0.4
0.032
20
38
0.5
0.5
0.04
28
38
0.7
0.7
0.05
40
50
1
1
0.08
100
all
2.5
2.5
0.125
200
all
5
5
0.2

 

Grade
VDwL
Lot Dia. Variation
μm
Gauge
Interval
μm
Preferred Gauge
μm
Subgauge
Interval
μm
Subgauge
μm
3
0.13
0.5
-5,-4.5,…,1,-0.5,0,+0.5,+1,…,+4.5,+5
0.1
-0.2,-0.1,0,+0.1,+0.2
5
0.25
-8,-7,…,-2,-1,0,+1,+2,…,+7,+8
1
0.2
-0.4,-0.2,0,+0.2,+0.4
10
0.5
-10,-9,…,-2,-1,0,+1,+2,…,+9,+10
16
0.8
20
1
2
-16,-14,…,-4,-2,0,+2,+4,…,+14,+16
0.4
-0.8,-0.4,0,+0.4,+0.8
28
1.4
40
2
4
-20,-16,…,-8,-4,0,+4,+8,…,+16,+20
0.8
-1.6,-0.8,0,+0.8,+1.6
100
5
10
-40,-10,…,0,+10,…,+40
2
-4,-2,0,+2,+4
200
10
15
-60,-15,…,0,+15,…,+60
3
-6,-3,0,+3,+6