In short, there is a proliferation of designs because engineers have come up with multiple solutions to the same challenges. Different people have discovered different methods of connecting shafts, creating a wide range of couplings.
Spoilt for choice
Generally, only a relatively small percentage of applications need a coupling with specific characteristics. For most customers, a reliable solution that accommodates some degree of misalignment is usually all that’s required. However, when it comes to specifying couplings that have different attributes, there are multiple designs from which to choose.
Read the full article in DPA's October issue