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21
T12
A1979
−
10.0 en
HBM
Important
Use a threadlocker (medium strength, e.g. LOCTITE) to glue the screws into
the counter thread to exclude prestressing loss due to screw slackening, in
the event of alternating loads.
NOTE
Comply with the maximum thread reach as per Table 6.1. Otherwise
significant measurement errors may result from torque shunt, or the
transducer may be damaged.
Measuring range
Fastening screws
Prescribed tightening
moment
N
V
m
Z
1)
Property class
N
V
m
100 / 200
M8
10.9
34
500
M10
67
1 k
M10
67
2 k
M12
115
3 k
M12
12.9
135
5 k
M14
220
10 k
M16
340
Table 6.1:
Fastening screws
1)
DIN EN ISO 4762; black/oiled/
m
tot
= 0.125
Important
Dry screw connections can result in different friction factors (see VDI 2230, for
example). This means a change to the required tightening moments.
The required tightening moments can also change if you use screws with a
surface or property class other than that specified in Table 6.1, as this affects
the friction factor.
7.6 Fitting the protection against contact (option)
The protection against contact comprises two side parts and four cover plates.
It is screwed onto the stator housing.
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