Patent ID: 6842963

Claim:
A process for finishing an end surface of a non-circular post, comprising: providing a workpiece, said workpiece having a first end, a second end opposite to said first end along a rotational axis, and a plurality of lateral sides connected between said first and second ends, said first end having a first end surface connected to said lateral sides to form therebetween a first peripheral edge, which defines a reference radius, said reference radius being equal to the largest distance from said first peripheral edge to said rotational axis; mounting a filling block around said first end of said workpiece, said filling block having an inner side-wall that is fitted tightly to said lateral sides of said workpiece, and an extension end surface that extends continuously and outwardly from and around said first peripheral edge and that faces in the same direction as said first end surface, said extension end surface lying flush with said first end surface and having a second peripheral edge, a distance from said rotational axis to said second peripheral edge being not smaller than said reference radius; and surface-finishing said first end surface of said workpiece and said extension end surface of said filling block, which are at least covered by an area bounded by a circular track, by using a cutter.