There are three different types of gearboxes: concentric, parallel, and right angle. A fourth type called shaft mount is also used in situations where the applications are in a configuration where they cannot be mounted by foot.
Its recommended to inspect the sprockets and chain regularly and Replace if significant wear or damage is observed.
Key Steel is made from 1045 Mild Steel and is Zinc Plated.
There is square and rectangular key steel all categorised also by measurement metric and imperial key steel.
A gearbox coupling, is a device used to connect the input and output shafts of a gearbox to the corresponding driven and driving components in a mechanical system. It provides a mechanical connection that allows for the transmission of torque and motion between the gearbox and the connected components.