[Mr V]

As to interfacing the smaller motors with drive systems there are a number of pinion gears that are available that can be pressed on the shaft.

However since the introduction of the Versaplanetary and the addition of the motor specific mounting plates I can't see moving back to using any other way to interface with the small motors. If you don't want or need the reduction from the VP you can configure it in a direct drive manner. You then have a pair of hex and a pair of keyed round output shaft configurations to choose from. They also provide a nice solution to mounting since they can be mounted from two sides or the face. With proper planning for access swapping out the motor is a breeze, whether you need a more powerful motor or to replace one that has failed.