Siemens SIMOTICS L-1FN3 - Specifications for Mounting Linear Motors

Configuration
5.4 Mounting
1FN3 linear motors
140 Configuration Manual, 10/2018, 6SN1197-0AB86-0BP2
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
DIN EN ISO 4762
– 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
k
/d > 5 for securing the screws.
Alternatively, secure the screws with Loctite 243, for example.
Tightening torques for screws of property class 10.9
Applicable for screws of property class 10.9
Friction value μ
tot
= 0.1
M5
M6
M8
7.6 Nm
13.2 Nm
31.8 Nm