Mounting With Knuckle Eyes - HBK U9C Montageanleitung

1. Installation and locking with initial stress (for dynamic loading):
- Unscrew the locknut and screw on the threaded connector.
- Pre-stress the transducer to 110% operating load in tensile direction.
The transducer itself can be used to measure this force.
- Hand-tighten the locknut.
- Relieve the load on the transducer.
Notice
If the torque for locking is shunted through the transducer, ensure that the maximum
torque is not exceeded. See specifications.
2. Mounting with locking
Screw on the load application parts and lock with a torque according to the table below.
Notice
As the initial stress also depends on the friction between the locknut and thread, the initial
stress cannot be precisely set correctly with this method. When using the force transducer
under high alternating loads, we therefore recommend installation using method 1
(installation and locking with initial stress).
Nominal (rated) force range
50 N - 1 kN
2 kN - 20 kN
7.3.2

Mounting with knuckle eyes

Knuckle eyes prevent the application of torsional moments and, where two knuckle eyes
are used, bending moments, together with lateral and oblique loads. They are particularly
suitable for static and quasi-static measurements. We recommend tension/compression
bars that are pliable for dynamic alternating loads.
Mounting with knuckle eyes is implemented in the same manner for loads a mounting
with tension/compression bars. Knuckle eyes without locking can be used for static and
quasi-static applications.
16
50 kN
Torque [Nm]
8
40
200
MECHANICAL INSTALLATION
U9C