Rotation to Linear Motion - Mechanical Principles with LEGO. A spinning motor… turned into straight-line movement. This LEGO build demonstrates how rotational motion can be converted into linear motion using classic mechanical principles. As gears and linkages rotate, a slider moves back and forth with precise, repeatable motion — no rails, no electronics. This principle powers engines, presses, pumps, and countless machines. Simple parts. Clear motion. Fundamental engineering logic. #LEGO #Mech