Harmonic Drive RSF supermini Series, Руководство пользователя

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Chapter 1 Overview of the RSF supermini series
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14
1-10 Allowable load
1-10-1 Allowable radial load and allowable thrust load
The gear head used in the RSF supermini series incorporates the high-precision 4-point contact ball
bearing for direct support of external load (output part).
The allowable radial load and thrust load of the
output shaft are shown below.
The allowable radial load F
r
is obtained with
respect to the center (L/2) 0 point of the output
shaft.
The values in the following table are designed
by considering the life of the bearing.
The allowable values must not be exceeded.
Model Unit RSF-3C RSF-5B
Allowable radial load (F
r
)
N 36 90
kgf 3.6 9.1
Allowable thrust load (F
S
)
N 130 270
kgf 13 27
1-10-2 Radial load when the operating point is different
If the operating point of radial load is different, the allowable radial load value is also different.
The relation between radial load position L
R
and allowable radial value F
R
is obtained from the following
formula.
The allowable values must not be exceeded.
F
R
=
L
a
L
a
+
L
R
F
r
F
R
: Allowable radial load at distance L
R
from the 0 point [N]
F
r
: Allowable radial load at the 0 point [N]
L
a
: Distance from the bearing starting point to the 0 point [mm]
L
R
: Distance from the position where radial load is exerted to the 0 point [mm]
L : Shaft length [mm]
Model RSF-3C RSF-5B
Allowable radial load (F
r
)
N 36 90
kgf 3.6 9.1
L
a
mm 8.6 9.85
L mm 7 10
0 point
L
R
L
L/2
F
r F
R
F
S
L
a