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 mount adapted to be attached to such a machine, and a slide coupled to the mount and adapted to move relative to the mount. A first bearing is coupled to the mount, and a second and third bearing are coupled to the slide and mounted for movement on the slide selectively toward or away from the first bearing. The first, second and third bearings are configured to engage 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 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 mount adapted to be attached to such a machine, and a slide coupled to the mount and adapted to move relative to the mount. A first bearing is coupled to the mount, and a second and third bearing are coupled to the slide and mounted for movement on the slide selectively toward or away from the first bearing. The first, second and third bearings are configured to engage the bore of the blade such that the bore is centered on the machine and the blade is rotatable about its center axis.

Abstract: In the clamping assembly of this invention, whereby a rotary cutting tool is concentrically clamped to an untapered shaft that carries and drives it, a sleeve-like radially elastic collet, received in a bore through a hub-like tool body part, has a threaded end portion which projects axially beyond the bore and on which a nut is rotatable. The collet has an untapered radially inner surface and a tapered radially outer surface that progressively increases in diameter from the thread to its opposite end. The bore, all along its length, defines a matingly tapering inner wedging surface in the body part. The collet is confined to axial shifting relative to the body part. The nut is confined to rotation by a radially outwardly projecting circumferential flange on it, overlain by an annular captivating plate secured to the body part.

Abstract: A collar is disclosed for mounting a radially separable cutting tool in installed concentrically on an arbor. The cutting tool is comprised of individual sectors that are radially separable, have inner edges that coact to define a center arbor receiving bore and apertures radially spaced from the inner edges for loosely receiving pins therein. The collar includes an annular flange having axially outer and inner faces and a bore for receiving the arbor therethrough. A plurality of pins are mounted in the collar flange and dimensional to loosely fit in the apertures in the cutter tool sectors. The pins project axially beyond the inner face and are movable radially toward and away from the bore for contact with the sectors mounted thereon to enable the pins to precisely move each sector into installed concentricity with the bore. A clamping mechanism is provided to clamp the cutter tool sectors against the inner face to maintain the sectors in installed concentricity.

Abstract: The face milling cutter of this invention has indexable inserts with double-positive rake. Square inserts for a substantially 0.degree. lead angle are insertable in the body interchangeably with different octagonal inserts that respectively provide for 15.degree., 30.degree. and 45.degree. lead every insert engages a radially outwardly facing relief surface on angles. One relief surface on the body that extends parallel to the cutter axis, and another engages an axially forwardly facing surface on a rear body member. The large area leading surface on each insert flatwise engages a circumferentially facing surface on the body that establishes the rake angles. Every insert has an operative cutting edge that is spaced radially outwardly from the body and has another and longer edge that is spaced axially fowardly from the front surface of the body and serves as a wiper land.

Abstract: A carbide tipped saw for cutting non-ferrous industrial metals, capable of use on a low-rpm metal sawing machine designed for saws with high-speed steel teeth, has higher hogger teeth alternating around its periphery with lower raker teeth. Each hogger has a cutting edge that is parallel to the saw axis and extends across more than half of the kerf width, defined by the junction of a positively raked front surface with a top surface. Oblique front edges on the hogger are defined by junctions of the front surface with oblique surfaces that lie between the top and side surfaces and face radially and axially outwardly. Each raker removes only side portions of the kerf and has swept-back cutting edges defined by the junctions of its top surface with chamfer surfaces that are negatively raked and face obliquely forwardly and axially outwardly.

Abstract: Noise output of a rotary cutting tool such as a circular saw blade is substantially reduced by means of a guard which wholly encloses the blade when the blade is not cutting and which comprises fixed and movable imperforate guard members, the movable guard member being movable to expose only the cutting segment of the blade. Inner surfaces of the flat side walls of the guard have sound absorbing means such as a Helmholtz resonator array or a layer of acoustical foam. Modifications of the guard to optimize its silencing effectiveness are disclosed.

Abstract: A circular saw blade has block-like tooth tip inserts of hard metal, secured at circumferentially spaced intervals to the peripheral portion of a disc-like blade body having opposite flat side surfaces. The gullet in front of each insert, conventionally present in such a blade, is spanned in the circumferential direction, at least to a substantial extent, by a fixed thin wall, which can comprise a reduced thickness portion of the blade body, so that each gullet is thus defined by a sidewardly and radially outwardly opening cavity in a side surface of the blade, and the blade has a near-circular periphery. At the circumferentially rearward and radially inward portions of each cavity its edges are substantially bevelled to facilitate flow of cuttings out of the cavity.