Hiwin MG Series - Mounting Tolerances

58
Appendix
Assembly instructions
Linear Guideways
GW-04-0-EN-1910-MA
12.3 Mounting tolerances
Once the precision requirements for the mounting surface have been fulfilled, the high precision and rigidity of the linear
guideways can be achieved without problems. In order to ensure quick assembly and smooth movement, HIWIN offers linear
guideways with light preload (Z0) which compensate deviations on the mounting surface over a wide area.
If the displacement forces of the blocks increase sharply after assembly, tension is very likely present. If this is
the case, check the mounting surfaces for contaminants and burrs, as well as the permissible accuracy toler-
ances..
NOTE
12.3.1 Tolerance for the parallelism of the reference surface (P)
Series Size Preload class
Z0 ZA ZB
HG/QH 15 25 18 —
20 25 20 18
25 30 22 20
30 40 30 27
35 50 35 30
45 60 40 35
HG 55 70 50 45
65 80 60 55
EG/QE 15 25 18 —
20 25 20 18
25 30 22 20
30 40 30 27
35 50 35 30
CG 15 9 5 4
20 11 7 5
25 12 8 6
30 14 9 7
35 15 11 8
45 19 12 10
WE 15 20 15 9
50 40 30 27
WE/QW 21
25 18 9
27 25 20 13
35 30 22 20
Unit: µm
Fig. 12.1 Parallelism of the reference surface (P)
Table 12.3 Maximum tolerance for parallelism (P)
P