| Grade | VOWS Ball Dia variation |
△sph Deviation From Spherical Form |
Surface Roughness |
| No Larger Than | |||
| μm | |||
| 3 | 0.08 | 0.08 | 0.010 |
| 5 | 0.13 | 0.13 | 0.014 |
| 10 | 0.25 | 0.25 | 0.020 |
| 16 | 0.4 | 0.4 | 0.025 |
| 20 | 0.5 | 0.5 | 0.032 |
| 28 | 07 | 0.7 | 0.040 |
| 40 | 1 | l | 0.050 |
| 60 | 1.5 | 1.5 | 0.060 |
| 100 | 2.5 | 2.5 | 0.080 |
| 200 | 5 | 5 | 0 150 |
| Grade | VDWS Ball Dla variation |
Gauge Interval |
preferred Gauge | Subgauge Interval |
Subgauge |
| μm | |||||
| 3 | 0.13 | 0.5 | -5,......,-0.5,0,+0.5,......+5 | 0.1 | -0.2.-0.1,0,4-0.1, +0.2 |
| 5 | 0.25 | l | -5,......,-1,0,+1,......+5 | 0.2 | -0.4,-0.2.0,+0.2,+0.4 |
| 10 | 0.5 | l | -9,.......-1,0,+1,......+9 | 0.2 | -0.4,-0.2,0,+0.2,+0.4 |
| 16 | 0.8 | 2 | -10,.......-2,0,4-2,......+10 | 0.4 | -Q.8,-0.4,0,+0.4,+0.8 |
| 20 | l | 2 | -10,......,-2,0,+2,......+10 | 0.4 | -Q.8,-0.4,0,+0.4,+0.8 |
| 28 | 1.4 | 2 | -12,.......-2,0,1-2,......+12 | 0.4 | -Q.8,-0.4,0,+0.4,+0.8 |
| 40 | 2 | 4 | -16,......,-4,0,+4,......+16 | 0.8 | -1.6,-0.8,0,+0.8,+1.6 |
| 60 | 3 | 5 | -20,......,-5,0,+5,......+20 | l | -2-1,0,+1,+2 |
| 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 |
