an assembly to mount a reciprocating saw blade to a rotating shaft is described herein . the assembly includes first and second coupling elements for receiving the reciprocating saw blade , wherein said elements are rotatably coupled and reversely driven in unison by the rotating shaft of the table saw , said elements both rotating at the same angular speed along respective circular paths of different radii . the assembly being mounted underneath the table saw top so that i ) a first coupling element which is furthermost away from the table saw top is movable along a larger circle than the other coupling element and ii ) the line intersecting both circular paths during rotation of the first and second coupling elements converges at a fixed position above the table saw top so that the upper side of a panel is cut during the downstroke of the saw blade , and the bottom side of the panel is out during the upstroke of the saw blade , thereby minimizing chipping of the panel cut edges .