Abstract: A saw is designed to support and drive saw blades such that the cutting edges of the saw blade will travel in an orbital path. The cutting edge of the saw blade is formed with first and second portions of its length which are angularly inclined with respect to one another and extend from opposite sides of an apex such that when the proximal end of the saw blade is driven the first and second portions of the saw blade will orbit in opposite directions. The saw teeth which are formed in the first and second sections are angularly inclined away from the apex so that cuttings are displaced from the apex toward the proximal end and from the apex toward the distal end of the saw blade. Two saw blades are mounted side-by-side with their proximal ends mounted on eccentric shafts which are spaced 180.degree. from one another.