Engineers need to consider several aspects for selecting the appropriate coupling such as the type of installation, primary and secondary connection, available space of installation, ease of mounting and dismounting as well as maximum rotational speed and resilience of the coupling. To compensate physical parameters or changes that are not obvious the safety factor, also known as safety multiple or safety coefficient, is taken into account.
The coupling is normally the softest element in the drive line, literally – but by no means the weakest link of the chain. Its configuration plays a decisive role for the functional capability of the driving and driven machine and for the reliability and lifetime of the entire drive system. The optimum adjustment of the coupling to the connected machine units is especially important in all cases where failures and breakdowns are not allowed to occur.
The cut-off date has passed. The new EU ATEX Directive is now valid. Manufacturers, distributors and operators should keep themselves informed, since the old certificates are no longer valid for any products that will be newly launched onto the market. There are also amendments pertaining to operators, who themselves set up a plant or an assembly from several components, for example, with a pump, coupling and engine. The user will then be considered as manufacturer and must know the exact properties of the components used, including the coupling.