TYPE

flatness of working surface and parallelism between opposite surfaces

squareness between working surfaces

length and width differences between a matched pair

precision grade um

00

0

00

0

00

0

SG 160

1.5

3

20

40

1.5

3.0

SG 250

2

4

30

60

2

4

SG 400

4

8

40

80

4

8

SG 630

6

12

50

100

6

12