The Machinemen are the black-clad grunts of Machine Empire Black Magma, bearing the symbol of Black Magma emblazoned on their face. They are antagonists in Taiyo Sentai Sun Vulcan.
Taiyo Sentai Sun Vulcan
The Machinemen were manufactured as the basic soldiers of Black Magma. There also existed a scientist class that wore white labcoats.
Kaizoku Sentai Gokaiger: The Flying Ghost Ship
Several Machinemen were part of an army of past enemy gruntsthat were fought by the Gokaigers in Los Dark's ghost dimension which housed the 1500 spirits of the villains defeated by the Super Sentai. After losing some of their number in an initial skirmish, the Machinemen merged with the other remaining grunts to form the Combined Combatant. Though the stronger opponent, the Combined Combatant proved to be unstable due to internal conflicting among the grunts composing him over who got to finish the pirates off. Taking advantage of this, the Gokaigers used the Battle Fever J Ranger Keys to destroy the Combined Combatant with the Penta Force cannon.