Abstract: Shearing assembly (10) for cropping machines (11) suitable to shear elements made of wood, plastic, metal, alloys or otherwise, shaped as rods (13) or sheet and placed on a work plane (11a). The shearing assembly includes at least a movable trolley (14) supporting at least a rotary blade (12) constrained to a supporting structure (15) of the cropping machine (11) by at least one guide (16), the movable trolley (14) moving alternately from an inactive position, wherein the blade does not come into contact with the work plane (11a), to a working position wherein the blade (12) comes into contact with the work plane (11a) to carry out the shearing operation.

Abstract: An apparatus for sequentially and automatically cutting a piece of dimension lumber at a number of predetermined angles to produce a building component, such as a rafter or truss web or chord, with composite or compound angles, is disclosed. The apparatus includes infeed and outfeed tables tiltable about a longitudinal axis and equipped with fences along which a workpiece moves longitudinally via moving devices. Clamps hold the workpiece at different positions relative to a cutting station during a cutting operation. A cutter, which for example includes a circular saw blade, is mounted for a positioning movement about a vertical axis at the cutting station, as well as for vertical movement to cut a workpiece at a predetermined composite or compound angle.