Abstract: A circular saw blade comprising: a rigid central disk that is provided with a central pass-through hole adapted to be engaged by the machine-tool spindle; and a series of teeth that jut out from the periphery of the rigid central disk in a substantially radial direction, are suitably spaced along the periphery of the rigid central disk and have, on their front edge, a cutting insert; at least one of said teeth being provided with a plate-like protruding ridge or appendage that projects from the back of the tooth, towards the cutting insert of the following tooth, and is tapered towards its distal end; said protruding appendage and the front edge of the following tooth being shaped so as to form a substantially circular-shaped gullet in front of the following tooth.

Abstract: A method for balancing disc blades comprising the steps of: determining the initial position of the center of mass of the disc blade to be balanced with respect to its main axis; calculating/determining the number, the position and/or the dimensions of one or more balancing holes eccentric with respect to said main axis and necessary for removing an amount of material sufficient to bring the center of mass of the disc blade at a distance from the main axis lower than a predetermined maximum limit value; and forming said balancing hole or holes on the central disc in an eccentric position with respect to said main axis.

Abstract: A system for mounting bearing and a router bit on the end of a drive shaft. The drive shaft includes and expandable end portion onto which the bearing member is mounted by an attachment element that is inserted substantially with the expandable end portion to cause sufficient expansion thereof to mount and retain the bearing member in place on the drive shaft.

Abstract: A router bit and method for cutting predetermined configurations in a workpiece. The router bit includes a body portion having an axis of rotation, a radial extent about the axis, and a longitudinal extent, and a shank member includes a shank to be retained in the rotating machine, with the shank extending along the axis and being formed integrally with the body. A first pair of cutter elements are mounted on the body diametrically opposed to each other, and each of the first pair of cutter elements has a cutting edge which extends generally radially. A second pair of cutter elements is mounted on the body in generally diametrically opposed relation to each other and circumferentially spaced from the first pair of cutter elements, and each of the second pair of cutter elements has a cutting edge extending generally longitudinally.