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The (customer-side) external thread must comply with a thread tolerance of 6 g for
metric threads and 3 A for UN/UNF threads.
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The threads must be cleaned of any deposits and soaked with graphite-free grease
before being screwed in.
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The following applies for steel force transducers (nominal (rated) forces from
12.5 kN): To achieve the full endurance strength, a material with sufficient tensile
strength (min. R
We recommend the use of threads rolled after heat treatment for measurement
ranges between 225 kN and 500 kN.
If the customer fits their own force application parts in the U10, and these have a differ
ent coefficient of thermal expansion from that of the measuring bodies (e.g. a
steel thread in an aluminum measuring body), and if these are fitted tilted or uncentered,
thermal stress may be produced during temperature variations that may adversely affect
the temperature dependence of the zero point due to irregular deformations. In this case,
to ensure precise measurements we recommend centering using centering dimension
"P", and using a nut that ensures a right angle for locking (e.g. by grinding the nut).
Alternatively, the connecting part could be designed so that it is fitted without locking
using centering dimension P. This is possible whenever the connecting structural ele
ments can be mounted using the "Pre-stressing with defined tightening torque" method
(see Table Tab. 7.1, page 19). This is the case for all nominal (rated) forces up to and
including 25 kN.
M16
22
16.5 f7
M16
A
Fig. 7.2
Adapter dimensions
18
= 900 N/mm
p, 0.2
2
) and hardness (min. 40 HRC) must be used.
min. 22
0.02
16.5 f7
M16
A
2:1
MECHANICAL INSTALLATION
A
0.03 A
U10M
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