The new PKN combines the proved and tested technical advantages of a metal bellows coupling with those of a plug-in connection. In contrast to other comparable solutions, the GERWAH® couplings do not need any axial pre-load. They ease the mounting of shafts, while remaining completely backlash-free and electrically isolating, and even compensating misalignments. The ‘PKN’ series is available for a wide range of rated torques. A metal bellows made of high-quality premium steel and hubs made of aluminum prolong the durability of this coupling. GERWAH® couplings convince customers all around the globe by their unequaled quality.
The ‘PKN’ series is your best choice when torque or rotary motion are to be transmitted from shaft to shaft with the greatest possible angular accuracy. These high-quality couplings compensate any radial, axial, or angular misalignments. When developing new elements, the RINGFEDER-engineers always turn their special attention to the quality of their products. Even small and less frequently stressed components are subject to the highest demands in terms of reliability. At bore diameters of 3-40 millimeters, the plug-in couplings of ‘PKN’ show their advantages whenever a firm connection needs to be made in limited mounting space.
GERWAH® metal bellows couplings transmit the power between the hub of the coupling and the shaft by the pressure and friction generated between the contact surfaces. The absence of any parallel keys makes the installation or removal of the coupling child’s play.