Abstract: An improved, preferably oil-less, air compressor assembly includes a frame and at least a first rotatable cam member mounted to the frame for selective rotation relative thereto. The first cam member has a cam profile. A motor is operatively interconnected with the first cam member for rotating the first cam member. A dual-acting piston assembly includes first and second rods operatively interconnected with a piston received in a piston housing, wherein the piston assembly is mounted relative to the cam profile whereby the piston is stroked upon rotation of the first cam member.