Size
(mm)

Flatness of working surface

Parallelism between V slot and bottom surface

Parallelism between V slot and side surface

Symmetry between V slot & end surface

Squareness between V Slot & end surface

Squareness between V Slot & bottom surface

Precision grade (μm)

40*90
63*90
100*90
160*90

0

1

0

1

0

1

0

1

0

1

0

1

1
2
2
2.5

2
3
4
5

3
4
4
5

6
8
8
10

3
4
4
5

6
8
8
10

5
8
8
10

10
16 
16 
20

5
8
8
10

5
8
8
10

3
4
4
5

6
8
8
10