Selecting Harmonic Drive® Gears - Harmonic Drive HFUS-2A Series Engineering Data

4.1 Selecting Harmonic Drive® Gears
When choosing a gear, both torque as well as stiffness requirements should be take into account. In robot applications, for
example, the necessary torque is the more crucial factor for the gear size, while the torsional stiffness is often decisive in
machine tool applications. We therefore recommend that you always take both criteria into account according to the following
procedures.
Yes
Yes
18
Application
Gear preselection
Torque based dimensioning
according to selection
procedure on page 19
Gear size
sufficient?
Stiffness based dimensioning
according to selection
procedure on page 22
Gear size
sufficient?
End of gear
selection
Selection of a
bigger size
No
Selection of a
bigger size
No
1019658 11/2014