Flipper (pneumatic) VS Lifter (electric)

[RogueTwoRobots]

Yeah with a larger pitch your lifter would move further for the same amount of turns as a thread with a finer pitch. A 5mm pitch would most likely be fine - even the pitch of scissor jack threaded rods, while less than 5mm, are larger than standard M10 or M12 threaded rod:

[attachment=0:3dxp1kyd]k3_build (36).JPG[/attachment:3dxp1kyd]

Not the clearest of pictures but you can see the threads are more spaced out compared with standard rod; this is one reason Kaizer's lifter has a good speed. The threads are also thicker and more durable, and the threads on a machine ball screw would be even more so.