Flexspline Screws - Harmonic Drive HFUS-2A Series Engineering Data

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.
Flexspline Screws
Table 49.1
Size
Number of screws
Size of screws
Pitch circle diameter [mm]
1)
Pitch circle diameter [mm]
2)
Screw tightening torque [Nm]
Transmittable torque [Nm]
1)
Transmittable torque 2) [Nm]
Modified version
1)
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.
1019658 11/2014
14 17 20
8 12 12
M3 M3 M3
64 74 84
54 66 76
2.0 2.0 2.0
104 176 206
88 157 186
25 32 40
12 12 12
M4 M5 M6
102 132 158
96 124 152
4.5 9.0 15.3
427 897 1507
402 843 1450
45 50 58
18 12 16
M6 M8 M8
180 200 226
170 190 218
15.3 37 37
2573 3486 5262
2430 3312 5076
49