SP
+
ATEX MC
Appendix
Revision: 07
2022-D014985
en-31
10.4
Specifications for startup and operation
Any mounting position can be selected for this gearbox.
With gearbox size SP
+
210, only use motors with a drive side fixed bearing.
10.4.1 Impermissible operating conditions
10.5
Tightening torques for common thread sizes in general mechanical engineering
The specified tightening torques for set screws and nuts are calculated values and are based on
the following conditions:
- Calculation in accordance with VDI 2230 (February 2003 version)
- Friction value for thread and contact surfaces µ=0.10
- Utilization of the yield stress 90%
- Torque tools type II classes A and D in accordance with ISO 6789
The settings are values rounded to usual commercial scale gradations or setting possibilities.
Use the
exact
values in this table to set your tools.
Ambient temperature
Product type
Minimum temperature
[°C]
Maximum temperature
[°C]
SP
+
0
+40
Operating temperature
Product type
Max. permissible housing temperature [°C]
SP
+
+80
Tbl-19: Ambient temperature / Operating temperature
The following operating conditions are not permitted:
- Lateral forces or bending torques acting on the blind hollow shaft / hollow shaft /
hollow shaft interface. If necessary, install external bearing points for the load
shaft. In case of unclear installation situations, contact
WITTENSTEIN alpha
GmbH
.
- Co-riding the gearbox on the drive axle is prohibited. Exceptions require a written
approval and technical statement from
WITTENSTEIN alpha GmbH
.
Tightening torque [Nm] with thread
Property
class
screw / nut
M3
M4
M5
M6
M8 M10 M12 M14 M16 M18 M20 M22 M24
8.8 / 8
1.15 2.64 5.2
9.0 21.5 42.5 73.5 118 180 258 362 495
625
10.9 / 10
1.68 3.88 7.6 13.2 32.0 62.5 108 173 264 368 520 700
890
12.9 / 12
1.97 4.55 9.0 15.4 37.5 73.5 126 202 310 430 605 820 1040
Tbl-20: Tightening torques for set screws and nuts
