Safety ? or overload ? Couplings are in a time of growing automation a kind of product which
gains more and more importance. In comparison to other safety mechanisms like an electronic
cut-off or the classic frictional slip hubs, the safety couplings offer different advantages.
They feature extremely short response times (3 ? 5 milliseconds) which results in an almost
on the spot torque break. So the safety of human and machines is assured in case of a machine
crash.
It is a reliable method to use safety couplings to prevent accidental personal injuries as well as
long standstills and high maintenance costs.
Furthermore, they are insensible against environmental circumstances like thermal fluctuation
or contacts with lubricants which especially cause negative effects on slip hubs.
The disengagement torque can be adjusted accurately by pre-stressed cup springs with a
degressive characteristic. As soon as the torque achieves the preset maximum, the coupling
disengages and the torque transmission breaks. This disengagement distance can be used to
include additional mechanical or electrical equipment (sensor) which makes the drive cut off
automatically.
After the torque falls below the allowed maximum torque, the safety coupling re-engages
automatically and continues transmitting the torque.
Additional to the effect of overload protection, the KBK safety couplings offer, depending on
which version was chosen, the added values of metal-bellows- or servo-insert- couplings. So
they offer the advantages of compensating misalignments, extremely high torsional stiffness
without restoring forces and backlash-free torque transmission. The version with the spider
element has the ability to compensate crashes and vibrations and is electrical isolating.
The incomplex design with few single parts and accordingly little mass and inertia gives the
possibility of an uncomplicated integration of the safety coupling in almost every drive chain
as well as a quick assembling/ disassembling without leaving any traces on the shafts.

KBK Safety Couplings are available in the following versions:

KBK/L (LL) Safety Coupling for mounting tooth belt pulleys, sprocket wheels, spur gears,... Torque range: 0,5 - 1600 Nm Version ?LL? with two bearings	?
KBK/BK Safety Coupling with metal bellows to connect two shafts for compensation of misalignment with collet clamps Torque range: 1 - 500 Nm	?
KBK/BI Safety Coupling with metal bellows to connect two shafts for compensation of misalignment with conical hubs Torque range: 3 - 1600 Nm	?
KBK/EK Safety Coupling Pluggable solution with elastomere gear ring to connect two shafts, damp vibrations and compensate misalignment Torque range: 3 - 500 Nm	?

• All bellows safety couplings available in different lengths
• Solutions for shaft diameters from 6 to 90 mm., Bores in inch available
• Customized solutions on request
• Keyways optional
• Different torque ranges per coupling available