Abstract: A machine cutter having a cylindrical supporting head having a plurality of slots formed in the lateral surface for receiving a plurality of cutting blades. The cutter further includes an assembly for securing each of the cutter blades in a respective slot. The assembly includes an element having a longitudinal V-groove for defining a passage with a complimentary V-groove formed in each blade, a longitudinal rod removably disposed in the passage and a screw disposable in a bore in the body adjacent to the element and having a tapered surface for engaging a cooperating sloping surface on the element.