HBM U10M Montageanleitung Seite 21

also correctly recorded if the transducer is mounted without axial play. The
transducer can be used without restrictions with the full oscillation bandwidth.
The customer's own structural elements (threaded bolts) must meet the follow­
ing conditions:
S The upper and lower force application parts must be aligned as accurately
as possible in one axis.
Installation is facilitated by centering aids at top and bottom. The centering
diameter corresponds to dimension P, the admissible centering depth is
3 mm (see Page 47ff).
S The anti-screw-through device attached to the internal thread of the adapter
must not be removed.
S The (customer-side) external thread must comply with a thread tolerance of
6g for metric threads and 3A for UN/UNF threads.
S The threads must be cleaned of any deposits and soaked with graphite-free
grease before being screwed in.
S The following applies for steel force transducers (nominal (rated) forces
from 12.5 kN): To achieve the full endurance strength, a material with suffi­
cient
tensile strength (min. R
must be used. We recommend the use of threads rolled after heat treat­
ment 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 different 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 varia­
tions that may adversely affect the temperature dependence of the zero point
due to irregular deformation. 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 elements can be mounted using the "Pre-stressing with defined tight­
ening torque" method (see below). This is the case for all nominal (rated)
forces up to and including 25 kN.
U10M/U10S
= 900 N/mm
p,0.2
A01385_06_YIC_06 HBM: public
Mechanical installation
2
) and hardness (min. 40 HRC)
19