pls no. Pls explain in more detail. Plz list uses. Plz

EDIT: These also fall under 'Moving Solids', and the devs go mad when they hear those two words.

If you want to use those as transportation, use PIPE. Info about it can be found on the glorious wiki

i want to have motors for projects using rotation and belts for linking thingsor make 2 motors spin

Depending on exactly what you want, it might be possible to emulate with current elements...

Most saves I've seen using this just use electricity going in a circle to represent spinning, as anything much more than that would be moving solids, which is probably the most frequently rejected feature