Harmonic Drive SHG Series Manual page 25

Hollow shaft gear
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Input Bearing SHG-2UH
The hollow shaft incorporated in the SHG-2UH Unit is supported by two single row deep groove ball bearings. Illustration
25.2 shows the points of application of force of the maximum permissible radial and axial loads as indicated in illustrations
26.1 and 26.2.
Example: If the hollow shaft of a SHG-40-2UH Unit is subjected to an axial load of 500 N, then the maximum permissible
radial force will be 420 N, see illustration 26.2.
The maximum values shown are valid for an average input speed of 2000 rpm and a mean bearing life of L
SHG-2UH Units of size 14 up to 25 the bearing A is pretensioned in axial direction by means of roller bearing compensation
washers. If the hollow shaft is subjected to an axial force acting in the negative direction (-F
shifted by the value „s" given in table 25.1. For the size 32 up to 58 the bearing A is designed as a fixed bearing.
Table 25.1
Symbol
[Unit]
C [N]
Bearing A
C
0
C [N]
Bearing B
C
0
Offset
a [mm]
Offset
b [mm]
Max. permissible
F [N]
radial load
Max. axial movement
of hollow shaft
s [mm]
at axial force = - F
a
Illustration 25.2
Lager A
Bearing A
F
r
F
+
-
a
s
b
1021387
12/2018
V02
SHG-14
SHG-17
SHG-20
4000
4300
4500
[N]
2470
2950
3450
4000
4300
4500
[N]
2470
2950
3450
27
29
16.5
17.5
263
284
1.8
2.8
Lager B
Bearing B
a
SHG-25
SHG-32
SHG-40
4900
14100
19400
4350
10900
16300
4900
5350
11500
4350
5250
10900
27
29.5
33
39.5
15.5
16.5
23.0
27.5
303
275
813
1210
2.4
3.2
= 35000 h. For
50
, see illustration 25.2) it can be
a
SHG-45
SHG-50
SHG-58
17400
24400
32000
16100
22600
29600
11900
12500
18700
12100
13900
20000
44
49
56.2
28.5
31.5
36.5
1000
1550
2060
SHG- 65
42500
36500
19600
21200
67
44.5
2300
25

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