Abstract: A cutter head having blade unit mounting cavities with spaced-apart mounting points and a blade unit. Each blade unit has at least one blade edge and is configured to have the blade edge disposed to align with the blade edge of another blade unit each in other mounting cavities. This forms a substantially helical blade when each blade unit is secured adjacent at least one of the spaced-apart mounting points.

Abstract: A device for centering tools, such as saw blades, rotary cutters and the like which are circular and which have bores of different sizes, on processing machines such that they can be positioned about their center axes. The device includes a mounting plate adapted to be attached to such a machine, a first and second bearings on the plate, and a third bearing mounted for movement on the plate selectively toward or away from the first and second bearings. The first, second and third bearings being engagable with the bore of the blade such that the bore is centered on the machine and the blade is rotatable about its center axis.

Abstract: A rotary cutter, in the nature of a milling cutter, especially for agglomerated foam plastic, has a body with a concentric surface of revolution onto which are brazed block-like carbide cutting elements. The cutting edges of circumferentially adjacent cutting elements lie on lines spaced apart circumferentially by between 0.60 in. (15 mm.) and 0.165 in. (17 mm.), and the kerfs of such cutting elements overlap. The cutting elements are received in shallow axially extending grooves in the body; their axial locations are established by reference to lines scribed around the body at uniform axial intervals.

Abstract: The head of a rotary cutting tool has an axially extending slot defining a flat, radially outwardly facing bottom surface and opposite undercut side surfaces, at least one of which makes an acute angle to the bottom surface. A cutter insert has a lower base portion in the slot and a cutting edge on an upper portion. The base portion comprises two wedging elements having opposite complementary tapers in width along their lengths to be relatively lengthwise adjustable for varying the width of the base portion. One wedging element is integral with said upper portion and is releasably maintained under radially outward force to be wedged between the other element and said side surface of the slot, thus holding the cutting edge at a distance from the tool axis determined by the lengthwise adjustment of the wedging elements.

Abstract: A cone hogger unit has axially juxtaposed cutting elements resembling circular saw blades that stepwise increase in diameter from one axial end of the unit. A cutting element intermediate the axial ends of the unit is integral with a body member that has opposite axially projecting hub-like portions, each extending through cutting elements at its axial side of said one cutting element. Circumferentially spaced screws, parallel to the unit axis and at one distance therefrom, pass through the smaller diameter cutting elements and are threaded into said one cutting element. The larger diameter elements are similarly secured by other screws at a greater distance from the unit axis.