User's Manual

Table Of Contents
Mechanical installation
30 A3276-8.0 HBM: public T40FM
Measuring
range
Fastening screws Maximum thread
reach Y of screws
in flange B
Prescribed
tightening
moment
kNVm Z
1)
Property class mm NVm
15
20
25
M18
10.9
30 400
30
40
50
M20 40 560
60
70
80
M22 45 760
1)
DIN EN ISO 4762; black/oiled/m
tot
=0.125
Tab. 5.1 Fastening screws
Important
Dry screw connections can result in different and higher
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 Tab. 5.1, as this affects the friction factor.