49
1019658 11/2014
5.9.3 Flexspline Screws
The connection of the Flexspline to the output is normally realised with screws or in case of higher torques with screws and
pins. If the load is below the limit for repeated peak torque the connection is carried out with screws as shown in table 49.1.
Table 49.1
Flexspline Screws
Size
14
17
20
25
32
40
45
50
58
Number of screws
8
12
12
12
12
12
18
12
16
Size of screws
M3
M3
M3
M4
M5
M6
M6
M8
M8
Pitch circle diameter
1)
[mm]
64
74
84
102
132
158
180
200
226
Pitch circle diameter
2)
[mm]
54
66
76
96
124
152
170
190
218
Screw tightening torque
[Nm]
2.0
2.0
2.0
4.5
9.0
15.3
15.3
37
37
Transmittable torque
1)
[Nm]
104
176
206
427
897
1507
2573
3486
5262
Transmittable torque
2)
[Nm]
88
157
186
402
843
1450
2430
3312
5076
1)
Modified version
2)
Standard version with compact flexspline
The tables are valid for completely degreased pads (friction coefficient µk = 0.15) and metric socket head cap screws according to EN ISO 4762 in 12.9 quality,
untreated, oiled, with µtotal = 0.12.