Specifications For Mounting Linear Motors - Siemens SIMOTICS L-1FN3 Configuration Manual

Configuration
5.4 Mounting
5.4.3

Specifications for mounting linear motors

General rules
When you fasten primary sections and secondary sections on the machine construction, you
must observe the following:
● Use screws of property class 10.9.
● Use only new, unused screws.
● Ensure that the correct types of mounting screws are used to fasten the secondary
sections:
– Cylinder head screws with normal head for 1FN3050 to 1FN3150 according to
– Cylinder head screws with low head for 1FN3300 to 1FN3900 according to DIN 6912
● Ensure that the mounting surfaces are free of oil and grease and are clean and
unpainted.
● Comply with the optimal surface roughness depth Rz of the screwing surface. Rz is
between 10 and 40 μm.
● Minimize the number of joints. This keeps the settling effect for the material and the
screws low.
● Note the presets for the thread depths and screw-in depths in the primary section.
● Tighten the mounting screws using torque control. If you cannot tighten the mounting
screws using torque control, at least use a calibrated torque wrench with a short bit insert.
Apply the tightening torques specified in the table below.
● Tighten the screws gradually, with no jerky movements.
● Select a long terminal length l
Alternatively, secure the screws with Loctite 243, for example.
Tightening torques for screws of property class 10.9
140
DIN EN ISO 4762
Applicable for screws of property class 10.9
M5
7.6 Nm
/d > 5 for securing the screws.
k
Friction value μ = 0.1
tot
M6
13.2 Nm
Configuration Manual, 10/2018, 6SN1197-0AB86-0BP2
M8
31.8 Nm
1FN3 linear motors