Flexible pin type couplings are positive-locking, torsionally elastic, flexible shaft couplings with rubbery-elastic transmission elements. They are failsafe and pluggable. Buffer material and buffer geometry ensure an optimal balancing between resilience and restoring action as well as a good damping behavior. Flexible pin type couplings are available in various series and designs. The assignment of driving and drive side is arbitrary. Due to the assembly, the pin coupling has a small circumferential backlash. After the installation of the coupling, it is required to align the drive as precisely as possible because the extent of the displacements have a decisive influence on the service life as well as on the restoring forces and torques. The permissible values define the limit for the sum of alignment errors and operational displacements. The operating temperature range is between -40 °C (-25 °C if constructed of gray cast iron) and, depending on the buffer material, up to +100 °C ( +120 °C are possible for a short time). Flexible pin type couplings exhibit progressive spring characteristics. Buffer and bolts are interchangeable with those of earlier models. The selection of material for the pin and buffer components depends on the rotational speed. While gray cast iron can be used for low rotational speeds it is required to fall back on steel solutions in case of high speeds. Available as further constructive designs are welded designs. The constructive design (welded part or ductile iron) of steel is done by the manufacturer depending on the size.

Types:

• design A/B: standard design;
• design P: design with brake drum;
• design S1: design with brake disk;
• design S2: design with radially removable brake disk;
• design H: design with spacer.

The following special designs are offered:
• design with axial backlash limitation;
• design with safety element;
• design for an explosive environment:

II 2G llB T5       -20 °C ≤ Ta ≤ +50 °C
II 2D 90 °C       -20 °C ≤ Ta ≤ +50 °C

• design with elastic pin couplings according to KWN 22009;
• design backlash-free due to prestress;
• design electrically insulating;
• design switchable at standstill;
• pin removable hydraulically;
• low temperature version;
• further version upon request.