Loading Capacity - HBM T40B Mounting Instructions

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Loading capacity

Nominal torque can be exceeded statically up to the limit torque. If the nom­
inal torque is exceeded, additional irregular loading is not permissible. This
includes longitudinal forces, lateral forces and bending moments. Limit values
can be found in the "Specifications" chapter (Chapter 13, page 55).
Measuring dynamic torque
The torque flange can be used to measure static and dynamic torques. The
following rule applies to the measurement of dynamic torque:
 The T40B calibration performed for static measurements is also valid for
dynamic torque measurements.
 The natural frequency f
depends on the moments of inertia J
masses and the torsional stiffness of the T40B.
Use the equation below to approximately determine the natural frequency f
the mechanical measuring arrangement:
+ 1
f · c
0
T
2p
 The permissible mechanical oscillation width (peak‐to‐peak) can also be
found in the specifications.
Nominal (rated) torque M
+ M
nom
0
- M
nom
Fig 8.1: Permissible dynamic loading
HBM
of the mechanical measuring arrangement
0
· 1 ) 1
J J
1 2
as a %
nom
Oscillation width
Oscillation width
and J of the connected rotating
1 2
f = natural frequency in Hz
0
J J = mass moment of inertia in kgm
1, 2
c = torsional stiffness in Nm/rad
T
200% oscillation width
Time t
Oscillation width
T40B
of
0
2
A3452-4.0 en/de