Dual arbor scrap chopper and chopper blade

A dual arbor scrap chopper comprising:

• a support housing;
• a pair of oppositely disposed arbors rotatably positioned within said housing;
• drive means interconnecting and controlling relative rotational speed of said arbors;
• at least one mounting means on said arbor for holding a blade in angularly transverse relation to said arbor;
• at least one blade secured angularly and transversely of said arbors in said mounting means on each arbor;
• and
• at least one cutting edge on each blade, which cutting edge on each blade is oppositely disposed on each arbor in order to coact upon matched rotation of said arbors, so that said cutting edges are aligned into a progressive shearing relationship on rotation of said arbor, whereby scrap metal material may be cut at high speeds, and
• wherein each blade is substantially the same length, height and width, and comprises a pair of spaced, substantially flat and parallel side surfaces, and a outwardly curved, transversely flat, face surface, and two cutting edges formed at the substantially right angle intersection of each of said side surfaces and said face surface, wherein said curved surface of said face surface is formed from two or more circular radii.