A cutting assembly for a crop harvester, wherein the cutting assembly comprises a cutting wheel assembly consisting of at least one cutting wheel having at least one cutting blade, a bracket fitted on the cutting wheel assembly, a power source fitted within the bracket for driving the cutting wheel(s), a support arm, a guide bush, a guide pipe that guides the reciprocation motion of guide bush in a controlled manner, a guide bush pin fitted within the guide bush, and a slit on the body of the guide pipe for accommodating the guide bush pin for restricting the guided reciprocating motion. The cutting assembly further comprises a displacing mechanism for angular and lateral displacement of the guide pipe and cutting wheel assembly, and a control mechanism for controlling the angular and lateral displacement of the guide pipe and cutting wheel assembly. Fig.1
