A cam is a simple mechanism that converts rotary motion (movement that goes round in a circle) into linear motion (movement in a straight line). These mechanisms can be found in car engines ...

You can even modify them to rotate continuously if that’s what you need. However, [Roger Rabbit] needed linear motion, but wanted the simple control afforded by an RC servo. The solution?

A breakdown of sought-after bearing types for linear and rotary motion applications, including crossed roller, flexible ball ...

A reciprocating engine needs its power translated to rotational motion, whereas the rotary engine produces direct rotational ...

Crank and slider linkages change rotary motion into reciprocating motion. A fixed pivot is attached to a crank, which turns around and pushes and pulls a slider. When used in a car engine ...

A rotary engine uses rotational movement of triangular rotors to turn the wheels, as opposed to a conventional engine, which converts piston movement into rotary movement of the wheels.