YASKAWA SGM7E

11.1 Reference Information for Servomotor Capacity Selection
11.1.2 Conversions between Traditional Units and SI Units
11-3
11
Appendix
11.1.2 Conversions between Traditional Units and SI Units
Quantity Traditional Unit SI Unit Conversion Factor
Force or load kgf N 1 kgf = 9.80665 N
Weight kgf – The numerical values are the same for mass in
the traditional unit and the SI unit.
(The mass SI unit Wkg is used for objects in
the Wkgf traditional unit.)
Mass
kgfs
2
/m
kg
Torq ue k gfmNm1 kgfm = 9.80665 Nm
Inertia (moment of
inertia)
gfcms
2
kgm
2
1 gfcms
2
= 0.980665 × 10
-4
kgm
2
GD
2
kgfm
2
kgm
2
Relationship between GD
2
(kgf·m
2
) and
moment of inertia
(kg·m
2
)
=
J
GD
4
J
4
J