Good actuators

[jonny]

it depends on the pitch of the rod you're using. you'd have to work out a good mix between crushing ability and speed. a speed 900 on 24v will give plenty of power, the main challenge of building an effective crusher is getting a sturdy enough frame.

[mattsdragons]

That's why I am thinking a commercial actuator as getting all the ratio correct and pivots will be very difficult, might try and find a alright 12v actuator and run 18v through it