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4.1.2
Life of the Wave Generator Bearing
The life expectancy of a Harmonic Drive® Strain Wave Gear is based on the average life of the Wave Generator Bearing. The
rated torque at the rated speed given in the rating table is based on the nominal service life L
The life expectancy of a component set or an unit operating at an input speed n (rpm) and output torque T (Nm) may be
estimated from equation 32.2.
Table 32.1
Harmonic Drive® Series
CobaltLine®, CSG, SHG
HFUC, SHG, CSD, CPU, CSF, SHD
PMG Gearbox
Equation 32.2
Equation 32.3
n
= Rated input speed [2000 rpm]
N
n
= Average input speed [rpm] (equation 30.5)
in av
T
= Rated output torque at rated speed [Nm]
N
T
= Average output torque [Nm] (equation 30.2)
av
L
= nominal service life of the Wave Generator Bearing, see table 32.1
n
32
Einheit
h
h
h
n
T
( )
3
N
L
= L
N
n
50
n
T
in av
av
–
1
L
L
≈
•
50
10
5
of the Wave Generator Bearing.
n
L
n
50000
35000
15000
1021387
12/2018
V02
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