Scotch-Yoke Mechanism The Scotch-Yoke is also known as the slotted link mechanism, is a reciprocating motion mechanism, capable of converting the linear motion of a slider into rotational motion , or vice versa directly depending on the application. A Scotch-yoke mechanism has a yoke frame with opposed parallel tracks engaged by rollers shown in form of block assembly, arranged to transmit power between a rotating crankshaft attached to crankpin which is mounted on block assembly, and oppositely directed pistons or other reciprocating parts mounted on the yoke frame, which move linearly in line with the reciprocating-axis. The piston or other reciprocating component can be coupled directly with a sliding yoke and slot engaged with a pin and the rotating par t. The motion of the piston is simple harmonic motion , taking into consideration that it has a constant amplitude, frequency, given ...