Abstract: A holesaw system comprises a holesaw including a base and a generally cylindrical wall with a proximal end coupled to the base and a distal end with a cutting edge; a pilot drill bit including a front cutting tip, a rear shank portion, and an intermediate portion between the front cutting tip and the rear shank portion; and an arbor coupleable to the holesaw and to the pilot drill bit. The arbor is configured to be operable in a first mode in which the holesaw and the pilot drill bit are rotatable in unison to form a hole in a workpiece and in a second mode in which the pilot drill bit is rotatable independently of the holesaw to remove a plug of material from the holesaw.

Abstract: An accessory for an oscillating power tool includes an attachment portion configured to be coupled to an oscillating power tool and a working portion extending generally along a longitudinal axis. The working portion has a rear end portion coupled to the attachment portion, a front cutting edge opposite the rear end portion, a first side edge extending from the front cutting edge to the rear end portion, and a second side edge opposite the first side edge and extending from the front cutting edge to the rear end portion. The working portion includes an at least partially curved surface that contains the longitudinal axis. At least a portion of the first side edge includes a first side cutting edge portion.

Abstract: A drill bit includes a shank, an intermediate portion with a helical flute, and a multi-stepped tip portion extending along the axis. The tip portion includes a cutting tip with a pair of primary cutting edges extending radially outward from the axis, a plurality of steps each having an elongated portion and a tapered portion tapered outward from the elongated portion relative to the axis. The elongated portions progressively increase in diameter from the cutting tip to the intermediate portion. The elongated portion of each step has an axial relief tapered inward toward the axis. A frontmost elongated portion has a first axial relief at a first angle relative to the central axis and a rearmost elongated portion has a second axial relief at a second angle greater than the first angle. The drill bit may be used as a pilot bit together with a holesaw in a system.

Abstract: A saw blade includes an elongated body with a working edge extending along a longitudinal axis. A first strip composed of carbide or cermet and including at least one first full cutting tooth is coupled to a first portion of the working edge by a first weld fusion zone composed of a ductile material. The first strip is set in a first direction at a first angle out of a plane of the body by a first bend in the first weld fusion zone. A second strip composed of carbide or cermet and including at least one second full cutting tooth is coupled to a second portion of the working edge by a second weld fusion zone composed of a ductile material. The second strip is set in a second direction, opposite the first direction, at a second angle out of the plane of the body by a second bend in the second weld fusion zone.

Abstract: A step drill bit includes a cutting head portion with a rear end coupled to a shank portion. The cutting head portion incudes a front cutting tip, a plurality of steps of progressively increasing diameter from the cutting head to the rear end portion. Each step includes a conical tapered portion that flares radially outward from the axis and a generally cylindrical portion that extends axially rearward from the tapered portion. A flute extends through the steps generally parallel to or helically relative to the axis. Primary and secondary cutting edges are formed at junctions between the tapered portions and the generally cylindrical portions and the flute. A depth stop flange extends radially outward from a rearmost step and has a diameter greater than the diameter of the cylindrical portion of the rearmost step. A deburring recess is disposed within or between one of the steps and includes a deburring edge at a junction between the deburring recess and the flute to remove burrs from an edge of a hole.

Abstract: A saw blade includes an elongated body extending along a longitudinal axis and having an elongated cutting edge. A first hard metal strip is attached to a first portion of the cutting edge and includes at least one first full hard metal cutting tooth that is set left at a first angle relative to a vertical axis of the body that is generally perpendicular to the longitudinal axis. A second hard metal strip attached to a second portion of the cutting edge and includes a second full hard metal cutting tooth that is set right at a second angle relative the vertical axis.

Abstract: An accessory tool for a power-driven oscillating tool may include a plate, with a first working section defined along a first peripheral edge portion of the plate, and a second working section defined along a second peripheral edge portion of the plate. The first and second working sections may define cutting or abrading or chipping sections of the accessory tool. The first and second working sections may be separated by a notch formed in a third peripheral edge portion of the plate. Corner portions of the first working section and the second working section may be defined where the first and second working sections meet respective edge portions of the notch, allowing the corner portions to be inserted into and engaged in corresponding corner portions of channels for removal of material from the corner portions of the channels.

Abstract: A reciprocating saw blade includes an elongated blade body extending along a blade axis and having a rear end, a front end, a cutting edge having a plurality of teeth, a non-cutting edge opposite the cutting edge; and a tang coupled to the rear end and configured to be received in a blade holder of a powered reciprocating saw. The cutting edge includes inclined and declined cutting edge portions. The inclined cutting edge portion extends away from the blade axis and toward the front end at an acute first angle and extends from a first tooth to a second tooth. The first tooth is closer to the rear end and closer to the blade axis than the second tooth. The declined cutting edge portion extends toward the blade axis and toward the front end at an acute second angle that is greater than the first angle and extends from a third tooth to the first tooth. The first tooth is closer to the front end and closer to the blade axis than the third tooth.

Abstract: A step drill bit includes a body with a plurality of cylindrical steps of increasing diameter from a front end toward a rear end, a flute extending from the front end toward the rear end, and cutting edges at junctions between each step and the flute. A cutting insert with a hardness greater than the hardness of the body is coupled to the front end portion and at least partially defines a cutting head portion. The cutting head portion includes a center cutting tip, a cutting edge extending radially outward from the cutting tip, a rake face extending from the cutting edge toward the rear end portion, a relief face extending from the cutting edge in a circumferential direction opposite a rotational cutting direction of the drill bit, and a chip clearing recess in communication with the flute, with the rake face facing the chip clearing recess.

Abstract: A reciprocating saw blade includes an elongated blade body extending along a blade axis and having a rear end, a front end, a cutting edge having a plurality of teeth, a non-cutting edge opposite the cutting edge; and a tang coupled to the rear end and configured to be received in a blade holder of a powered reciprocating saw. The cutting edge includes inclined and declined cutting edge portions. The inclined cutting edge portion extends away from the blade axis and toward the front end at an acute first angle and extends from a first tooth to a second tooth. The first tooth is closer to the rear end and closer to the blade axis than the second tooth. The declined cutting edge portion extends toward the blade axis and toward the front end at an acute second angle that is greater than the first angle and extends from a third tooth to the first tooth. The first tooth is closer to the front end and closer to the blade axis than the third tooth.

Abstract: A hole cutting accessory for a power-driven tool may include an arbor that provides for quick release of an annular saw blade component of the accessory, and for quick release of a pilot drill bit component of the accessory. The quick release of the annular saw blade component from the arbor may be accomplished separately from the quick release of the pilot drill bit component from the arbor.

Abstract: An accessory includes an attachment portion with a central opening configured to be coupled to an oscillating power tool and defining a first axis generally parallel to a power tool axis. An intermediate portion with a first side edge and a second side edge has a proximal end portion coupled to the attachment portion and extends away from the attachment portion to a distal end portion. A working portion is coupled to and extends away from a distal end portion at an angle to the intermediate portion and at an angle to the first axis. The working end portion has a non-cutting third side edge continuous with the first side edge and a cutting fourth side edge continuous with the second side edge. The intermediate portion wraps at least partially around an obstruction located along the first axis so the working portion can cut a workpiece located behind the obstruction.

Abstract: An accessory for an oscillating power tool includes an attachment portion configured to be coupled to an oscillating power tool and a working portion extending generally along a longitudinal axis. The working portion has a rear end portion coupled to the attachment portion, a front cutting edge opposite the rear end portion, a first side edge extending from the front cutting edge to the rear end portion, and a second side edge opposite the first side edge and extending from the front cutting edge to the rear end portion. The working portion includes an at least partially curved surface that contains the longitudinal axis. At least a portion of the first side edge includes a first side cutting edge portion.

Abstract: A reciprocating saw blade includes an elongated blade body extending along a blade axis and having a rear end, a front end, a cutting edge having a plurality of teeth, a non-cutting edge opposite the cutting edge; and a tang coupled to the rear end and configured to be received in a blade holder of a powered reciprocating saw. The cutting edge includes inclined and declined cutting edge portions. The inclined cutting edge portion extends away from the blade axis and toward the front end at an acute first angle and extends from a first tooth to a second tooth. The first tooth is closer to the rear end and closer to the blade axis than the second tooth. The declined cutting edge portion extends toward the blade axis and toward the front end at an acute second angle that is greater than the first angle and extends from a third tooth to the first tooth. The first tooth is closer to the front end and closer to the blade axis than the third tooth.

Abstract: A saw blade includes an elongated body extending along a longitudinal axis and having an elongated cutting edge. A first hard metal strip is attached to a first portion of the cutting edge and includes at least one first full hard metal cutting tooth that is set left at a first angle relative to a vertical axis of the body that is generally perpendicular to the longitudinal axis. A second hard metal strip attached to a second portion of the cutting edge and includes a second full hard metal cutting tooth that is set right at a second angle relative the vertical axis.

Abstract: A double-sided saw blade, such as a hack saw blade, comprising a blade body defining a first end and a second end; a first cutting edge located on one side of the blade body defining a first cutting tooth set pattern and a second cutting edge located on an opposite side of the blade body defining a second cutting tooth set pattern; wherein the first set pattern and the second set pattern are (i) timed with respect to one another or (ii) 180 degrees out of phase with respect to one another. A first tooth of the first set pattern may be indexed relative to a designated reference point along the blade body and a first tooth of the second set pattern may be equally indexed relative to the same designated reference point along the blade body.

Abstract: A recip blade includes a blade body, a tang, a distal end, a cutting edge, and a rib. The tang is located an end of the blade body. The distal end is located at an opposite end of the blade body relative to the tang. The cutting edge extends in a lengthwise direction at least substantially between the tang and the distal end. The rib extends along at least a portion of the blade body. The rib and the cutting edge are spaced from one another by a heightwise-extending distance. A method includes: (i) providing a recip blade including the blade body, the tang, the distal end, and the cutting edge; (ii) forming the rib by increasing a widthwise-extending thickness of the blade body at the rib in comparison to a widthwise-extending thickness of the blade body at an adjacent portion of the blade body.

Abstract: A hole cutter has a substantially cylindrical blade body that defines an interior surface and an exterior surface that is located on an opposite side of the blade body relative to the interior surface. A cutting edge is located at one end of the blade body that generates swarf in cutting the work piece. A pattern is formed on the exterior and/or interior surfaces of the blade body. The pattern is configured to direct swarf generated at the cutting edge through the path and away from the cutting edge.

Abstract: A double-sided saw blade, such as a hack saw blade, comprising a blade body defining a first end and a second end; a first cutting edge located on one side of the blade body defining a first cutting tooth set pattern and a second cutting edge located on an opposite side of the blade body defining a second cutting tooth set pattern; wherein the first set pattern and the second set pattern are (i) timed with respect to one another or (ii) 180 degrees out of phase with respect to one another. A first tooth of the first set pattern may be indexed relative to a designated reference point along the blade body and a first tooth of the second set pattern may be equally indexed relative to the same designated reference point along the blade body.