MGB EN

MGB | Data sheet

■ Shoulder height of the mounting base and corner radius The mounting base of the MGB rail and MGB block has a reference surface on the side face to allow easy installation. The height of the datum shoulder varies based on the model. See below for details. The corner of the mounting shoulder must either include a recess or be machined smaller than the corner radius r to prevent interference with the chamfer of the rail or block. The corner radius r values vary depending on the model. See details below.

Rail max. corner radius r1 [mm]

Block max. corner radius r2 [mm]

Rail shoulder height H1 [mm]

Block shoulder height H2 [mm]

H3

Size

[mm]

MGB 15

0.5

0.5

3

4

4.7

MGB 20

0.5

0.5

3.5

5

4

MGB 25

1

1

5

5

5.5

MGB 30

1

1

5

5

7

MGB 35

1

1

6

6

7.5

MGB 45

1

1

8

8

10

Tab.20

r 2

r

r 2

r

H 2

H 2

H 3

H 1

r

r 1

r 1

r

H 1

H 3

MGB block

MGB rail

Fig.22

■ Reference error tolerance for the mounting surface The self-aligning capability of the MGB guide ensures smooth linear motion, even when slight distortions or surface errors are present. □ Reference horizontal error tolerance between two rails Mounting surface error may affect the service life of the MGB guide. The following tables show the approximate reference horizontal error tolerance (P) between two rails in general use.

Normal K0 [μm]

Light preload K1 [μm]

Medium preload K2 [μm]

Size

P

15

25

18

-

20

25

20

18

25

30

22

20

30

40

30

27

35

50

35

30

45

60

40

35

Fig.23

Reference horizontal error tolerance (P) between two rails.

Tab.21

rollon.com

20