Sporocarp production by basidiomycetes

Apparatus for deburring and chamfering at least one side of an opening in a contoured surface of a metal workpiece comprising a sliding platform having a clamping mechanism for holding and positioning the workpiece relative to a cutting tool which uniformly cuts the edge of the opening to deburr and chamfer it. The apparatus has an elongated spindle mounted for axial and rotational movement and a cam follower on the spindle that cooperates with a stationary cam surface having a contour corresponding to the contour of the workpiece surface. During rotation of the spindle, the cutting tool is guided to follow the contoured surface of the workpiece opening and thereby produces a uniformly chamfered opening.