Abstract: A circular saw includes a circular disk-shaped body with an outer periphery having saw teeth separated by gullets and saw tooth tips at the saw teeth. The saw tooth tips have a saw kerf. At least one of the gullets has a radially innermost margin at a first radius. The body has a thickness discontinuity at a second radius, the second radius being at least equal to the first radius. The body has a first thickness adjacent to and radially outside of the thickness discontinuity and a second thickness adjacent to and radially inside of the thickness discontinuity. The second thickness is greater than the first thickness. The ratio of the difference between the second thickness and the first thickness, and the difference between the kerf and the first thickness is equal to or greater than 0.25.

Abstract: A circular saw blade comprises a generally circular body defining cutting teeth at a periphery thereof. First apertures in the body define a first mounting hole pattern for receiving mounting pins of a first circular saw machine defining a first mounting pin pattern thereof for mounting the circular saw blade thereto. Second apertures in the body define a second mounting hole pattern different than the first mounting hole pattern for receiving mounting pins of a second circular saw machine defining a second mounting pin pattern thereof different than the first mounting pin pattern for mounting the circular saw blade thereto. At least one of the first apertures and at least one of the second apertures are (i) at least one of (a) radially and (b) circumferentially displaced from each other; and (ii) at least one of (a) overlap and (b) are connected to each other.

Abstract: A saw blade with saw teeth arranged along a rectilinear tooth side of a blade support. The saw blade includes at least one damping area.

Abstract: A saw blade including a base and a plurality of teeth extending generally outwardly from the base. At least one of the plurality of teeth comprises a first and a second portion. The first portion includes a cutting tip having an initial rake angle and the second portion includes a cutting tip having a second rake angle greater than the initial rake angle. The second portion is disposed closer to the base than the first portion.

Abstract: The invention concerns a pair of saw blades, including a first blade and a second blade, which are arranged to rotate around the same rotational axis in opposite directions. Each of the blades has its own blade body and peripheral cutting elements, wherein the blade body of the first blade has a front side, which is turned towards a back side of the blade body of the second saw blade, and wherein the cutting elements form overhangs protruding from said front or back side. Said front and/or back side have/has a circumferential ridge, which is arranged peripherally inside of the cutting elements and to slide over a corresponding part or a corresponding ridge on the opposite back side and/or front side, wherein the ridge/ridges is/are made in one piece with the blade body in question and serves/serve as a spacer means to prevent the cutting elements with their overhangs to hit each other during rotation of the blades.

Abstract: A cutting apparatus configured to cut a sheet or a sheet bundle includes a cutting blade whose blade surface has a plurality of grooves. In the cutting apparatus, a scraping member enters the grooves provided on the blade surface to scrape off cutting scraps remaining after a cutting operation. Accordingly, the cutting apparatus can scrape off cutting scraps from the cutting blade even if the adhesive force of the cutting scraps is great.

Abstract: A reciprocating saw blade includes a body defining a longitudinal axis, an attachment configured to couple to a reciprocating saw, and a cutting portion. The cutting portion includes a plurality of cutting teeth, each having a tip and a rake face. The saw blade also includes a plunge point for initiating a plunge cut. The plunge point includes a leading tooth having a tip and a rake face extending from the tip. The tips of the plurality of cutting teeth and the tip of the leading tooth define a plane that is generally parallel to the longitudinal axis. A first angle between the plane and the rake face of the leading tooth, measured through the leading tooth, is greater than 90 degrees. A second angle between the plane and the rake face of each cutting tooth, measured through the corresponding cutting tooth, is less than 90 degrees.

Abstract: A saw-blade comprises a disc and a plurality of tooth holders. The saw blade disc has a plurality of receiving stations with at least one recess with an indentation extending tangentially from a radially inner leading edge portion thereof. Each one of the tooth holders has a protrusion extending tangentially from a radially inner leading edge portion thereof. The tooth holders are engageable in the receiving stations of the saw blade disc with the protrusions of the tooth holders being inserted in the indentation of the receiving stations.

Abstract: A saw blade having a blade body, a plurality of cutting teeth defining a cutting edge along an edge of the blade body, each tooth along the cutting edge defining a cutting tip. At least one tooth tip along the cutting edge includes a different material, such as, for example, high speed steel, carbide, diamond, and/or a tip coating, than at least one other tooth tip along the cutting edge. The plurality of teeth may be arranged in a repeating pattern or in no pattern along the cutting edge. A method of manufacturing the saw blade includes forming a cutting edge along an axial edge of a blade body, defined by a plurality of cutting teeth having respective tooth cutting tips, wherein at least one tooth tip along the cutting edge includes a different material than at least one other tooth tip along the cutting edge.

Abstract: A saw blade includes a circular core having a plurality of cutting elements along its periphery, and a central arbor hole. One or more offset gullets extend radially inward from the perimeter of the core. Each offset gullet includes a first opening in one side of the core and a second opening in the other side of the core. The first and second openings are adjacent but at least partially offset from one another, so that at least a portion of the offset gullet is not see-through.

Abstract: Saw blades, including band saw blades, reciprocating saw blades, hole saw blades and hand hack saw blades, are made from a bi-metal strip. The bi-metal strip includes a cutting edge defined by a plurality of cutting teeth that is welded to an axially-elongated carbon or spring steel backing. The cutting edge is formed of a high speed steel alloy consisting essentially of: about 8/10% to about 1% carbon, up to about 45/100% silicon, up to about 4/10% manganese, up to about 3/100% phosphorous, up to about 3/100% sulfur, about 4% to about 6% cobalt, about 3% to about 5% chromium, about 4-1/2% to about 5-1/2% molybdenum, about 1% to about 2-1/2% vanadium, about 5-1/2% to about 7% tungsten, and about 74% to about 78-1/2% iron.

Abstract: A reciprocating saw blade for use with a reciprocating saw includes a body defining a longitudinal axis, an attachment portion configured to couple to the reciprocating saw, and a cutting portion formed on the body. The cutting portion includes a plurality of cutting teeth. Each cutting tooth includes a tip, a rake face extending from the tip generally toward the longitudinal axis and defining a gullet, and a relief surface extending from the tip. The blade also includes a plunge point formed on the body for initiating a plunge cut. The plunge point includes a leading tooth and a second tooth. The leading tooth includes a tip and a rake face extending from the tip generally toward the longitudinal axis and defining a leading gullet. The second tooth is positioned in the leading gullet adjacent the leading tooth and is generally smaller than the leading tooth and each cutting tooth.

Abstract: A planar band saw blade having an outer cutting edge with a plurality of saw teeth also includes sets of secondary teeth placed in cutout portions along a centerline of the band saw blade. The secondary tooth sets provide portions within the body of the saw blade that provide additional cutting action that reinforces the primary outer cutting edge of the blade. The band saw blade may include teeth on each parallel edge and the interior tooth sets in each cutout portion alternatively point toward opposite edges.

Abstract: The present invention relates to pair of saw blades, comprising a first saw blade and a second saw blade which are coaxial and rotating in opposite directions, wherein each saw blade comprises a circular blade body and saw teeth at periphery of the blade body, a gap is arranged between the first saw blade and the second saw blade, the first blade body of the first saw blade is provided with a protrusion protruding toward the second saw blade, and the second blade body of the second saw blade is provided with a groove corresponding to the protrusion. Therefore, it is difficult to cause interference between the two saw blades even though either of the saw blades is deformed.

Abstract: A saw blade (4) for a machine operating with adjacent saw teeth traveling in two opposite and parallel directions comprises a blade substrate, teeth (16), and tooth necks (30) formed at the periphery of the substrate for holding the teeth (16) in place. Each tooth neck (30) has a protection surface (34), which is located in a plane that is parallel to the plane of the blade substrate (8), for protecting the tooth (16) against impact with any part of said adjacent saw blade. Each tooth (16) is located on the respective neck (30) in such a way that the tooth (16) is displaced from the protection surface (34) and from the adjacent saw blade in a direction normal to the plane of the protection surface (34).

Abstract: A saw blade or a cut-off wheel for an oscillating tool machine includes a base body, wherein the base body has a cutting area and the cutting area is coated with a granulated carbide, wherein the base body is formed in one piece and includes martensitic stainless steel and/or martensitic steel.

Abstract: A band saw blade includes multiple saw teeth having a straight tooth and right and left set teeth, and also includes a gullet portion provided between the saw teeth. A rake surface of each of the saw teeth is provided with a chip curler portion formed into an arc shape at an entire range of approximately 90° to form a chip generated at the time of cutting a work into a small rolled shape before the chip comes into contact with a bottom portion of the gullet portion. A chip non-contact surface to be kept out of contact with the chip is formed to have either a flat surface or a convex surface between the chip curler portion and the bottom portion of the gullet portion, and a dent portion is formed between the chip non-contact surface and the gullet bottom portion, the dent portion recessed from the chip non-contact surface in an opposite direction to a moving direction of the band saw blade in order to increase a radius of a concave curved surface constituting a back side of the gullet bottom portion.

Abstract: A pair of saw blades comprises a first blade (1), which is adapted to rotate in a first direction about an axis of rotation (r), and a second blade (2), which is adapted to rotate in a second direction opposite to said first direction about the same axis of rotation (r), wherein each blade (1, 2) has a blade body (3, 4) and cutting elements (5, 6), which are provided along the periphery of the blade body (3, 4) and adapted to run close and in parallel to each other when the blades (1, 2) are rotating. A spacer means (7), which extends into a space between the two blades (1, 2), is attached to at least the blade body (4) of one of the blades (2) in order to support itself against and slide along a peripheral part of the other opposite blade (1).

Abstract: A method for producing a saw blade having saw teeth arranged along a tooth side includes connecting carbide teeth to a tooth support by introducing heat and removing material from the saw blade tip until a distance between the tooth face of the front saw tooth and the saw blade tip does not exceed a limit value.

Abstract: A cutting blade for a hand-guided trimmer with a drive motor has a disk-shaped base member with cutting teeth disposed about a circumference of the base member. The base member has a first face and a second face opposite the first face. The cutting teeth each have a tooth face edge, the tooth face edge leading in driving direction of the cutting blade and extending radially, and a tooth back edge extending in the circumferential direction. The tooth face edge and the tooth back edge of the cutting teeth are alternatingly ground on the first face or the second face in the circumferential direction and define together a common cutting tip that is leading in the drive direction. Several of the cutting tips of the cutting teeth that are sequentially arranged in the circumferential direction are positioned in a common plane.

Abstract: A method for manufacturing a reciprocating saw blade includes forming a plurality of teeth into coil stock, feeding the coil stock into a die set, locating at least one of the plurality of teeth on the coil stock in the die set, flattening a portion of said teeth on said coil stock in said die set; forming a first tooth and a first gullet of a reciprocating saw blade out of the flattened portion of the coil stock in the die set, and forming a reciprocating saw blade having a first tooth with a first gullet, the first gullet being enlarged with respect to remaining gullets of said plurality of gullets.

Abstract: A saw blade (4) for a machine operating with adjacent saw teeth traveling in two opposite and parallel directions comprises a blade substrate, teeth (16), and tooth necks (30) formed at the periphery of the substrate for holding the teeth (16) in place. Each tooth neck (30) has a protection surface (34), which is located in a plane that is parallel to the plane of the blade substrate (8), for protecting the tooth (16) against impact with any part of said adjacent saw blade. Each tooth (16) is located on the respective neck (30) in such a way that the tooth (16) is displaced from the protection surface (34) and from the adjacent saw blade in a direction normal to the plane of the protection surface (34).

Abstract: A saw blade (1) includes a tooth supporting body (2) and a plurality of teeth (3) being arranged at the tooth supporting body (2). Each of the plurality of teeth (3) includes a tooth tip (8) including a cutting portion (9). The cutting portion (9) and at least another part of the tooth tip (8) of the teeth (3) are made of a steel alloy that has been produced by powder metallurgy and full annealing.

Abstract: A packaging material handling device is disclosed. The device includes a first pair of traction members configured for cooperatively engaging a chain of pre-inflated pillows from opposite sides thereof and being operable for driving the chain in the flow direction. The device further includes a second pair of traction members configured for cooperatively engaging the chain from opposite sides thereof. The second pair of traction members are spaced apart from the first pair of traction members along a flow direction and are operable for driving the chain in the flow direction. The first and second pairs of traction members are operable for holding the first and second portions of the chain during a breaking operation. The device further includes a breaking member disposed between the first and second pairs of traction members and movable against the chain across the flow direction in the breaking operation to break the chain for detaching the first portion from the second portion.

Abstract: An agricultural cutting blade has top and bottom surfaces and mounting apertures extending through top and bottom surfaces. A cutting edge support surface (e.g. that may be a flat, pointed or rounded) is formed on the cutting blade body with the cutting edge support extending along a side of the cutting blade body transversely between the top and bottom surfaces. A clad material deposited upon the cutting edge support such as by laser cladding process. The clad material can be built up, that is layered in partial or full overlapping relation to provide at least 2 and often more than 4 layers of clad material at one or more locations. A cutting edge provided by the clad material that may be a ground surface into a laser clad bead.

Abstract: A blade for use with a reciprocating saw includes an attachment portion configured to couple to the reciprocating saw and a body extending from the attachment portion. The body includes a first portion, a tip portion, a second portion extending from the first portion to the tip portion, and a cutting edge. The second portion has a height less than a height of the first portion. The blade also includes a blunt tip formed at a distal end of the tip portion and a plurality of gullets formed in the second portion. At least one of the gullets has a generally trapezoidal shape.

Abstract: A reciprocating saw blade includes a body, and the body includes a connecting portion for connecting the blade to the saw, and a cutting edge. The cutting edge includes a plurality of teeth organized in an overall tooth set pattern. The overall tooth set pattern approximately corresponds to the stroke length of the reciprocating saw. By the overall tooth set pattern corresponding to the stroke length of the reciprocating saw, the cut time is decreased, the life of the blade is increased, the vibration is minimized and/or a smoother finishing cut is enabled.

Abstract: A reciprocating saw blade has a blade body defining first end and second ends. A first cutting edge is located on one side of the blade body, and a second cutting edge is located on an opposite side of the blade body thereof. A first tang is located at one end of the blade body and defines a first acute cutting angle of the first cutting edge. A second tang may be located at another end of the blade body and defines a second acute cutting angle of the second cutting edge. The first and second tangs are alternately and releasably engageable by the chuck of the reciprocating saw. At least one cutting edge may be defined by a plurality of groups of cutting elements. Each group of cutting elements is oriented at a respective acute cutting angle relative to a tang edge that defines an effective cutting angle for that group of cutting elements.

Abstract: An accessory for a power tool, includes a mounting portion configured to mate with an oscillating drive member of a power tool. A support arm portion extends from the mounting portion in a first direction. The support arm portion includes an inner edge that faces in a second direction transverse to the first direction. A blade portion extends from the support arm generally in the second direction. The blade portion includes a trailing edge arranged facing generally toward the mounting portion and a leading edge arranged facing generally away from the mounting portion. The trailing edge and the leading edge portion meet to define a pointed tip portion.

Abstract: A circular saw blade has a frame, which includes a plurality of recesses and a groove. The circular saw blade also has at least two arc-shaped blade strips, each having a plurality of sawteeth formed on the outer rim and at least one bump and a protruding piece on the inner rim, such that each bump is configured for mating with its corresponding recess on the frame and the protruding piece is formed extending along the circumference of the inner rim for insetting into the groove of the frame.

Abstract: An apparatus for cutting a sheet stack is provided. The sheet stack is composed of a plurality of sheets. The apparatus includes a cutting blade having a plate form and having a cutting edge at one side extending along a cutting width direction. The cutting blade has at the one side: a plurality of projecting blade portions having ridge lines forming edge lines capable of thrusting and sawing cutting, the projecting blade portions projecting in a cutting direction; and a straight bottom portion between adjacent projecting blade portions. Cutting of the sheet stack is performed by applying a load to the cutting blade in the cutting direction, and by reciprocating the cutting blade along the cutting width direction.

Abstract: A saw blade has a cutting edge including a plurality of teeth with a tip, a clearance surface on one side of the tip, a rake face on an opposite side of the tip relative to the clearance surface, a gullet, and a substantially flat or non-curvilinear projection between the rake face and the gullet projecting outwardly relative to the rake face. The projection is inclined at an acute angle relative to a plane extending between the tips of consecutive unset teeth, with an inner end adjacent to the rake face at least about 25/1000 inch below the tip and an outer end adjacent to the gullet. The distance between the inner and the outer ends in a direction substantially parallel to the plane extending between the tips of at least two teeth is less than about 65/1000 inch.

Abstract: A portable zero clearance circular saw including a motor frame portion with a transverse oriented drive shaft and arbor coupled to the drive shaft, a handle portion with, a hand grip coupled to the motor frame portion aft end, a planar blade deck on a first lateral side, a movable blade shield rotatably mounted coaxial with the drive shaft and having a sidewall with a edge face coplanar with the blade deck, a trigger proximate the hand grip to move the blade shield, and a blade couplable to the drive shaft against the arbor, such that the blade outer surface is flush with the blade deck and blade shield sidewall. The handle portion may be rotatably coupled to the motor frame portion, and may include two laterally disposed blade shield triggers operably coupled to the blade shield via a dual pulley system.

Abstract: In order to perform turning operations of the kind that has heretofore been performed by diamond-shaped inserts, an insert which is basically equilateral triangular in shape with multiple alternately usable cutting edges, of which all three corners are usable as cutting edges, without decreasing the positional accuracy of the cutting edge during cutting. At least one recess and a plurality of protrusions are formed on each side of the insert. The recess and protrusions formed on the insert are brought into engagement with a protrusion and recesses formed on a side wall of a seating groove formed in a holder. In this state, the insert is pressed against a bottom seating face and the side wall of the seating groove with a clamp as a means to stably restrain the insert. This prevents shifting of the cutting edge during cutting even if the direction of the cutting force changes.

Abstract: A cutting disk for a rotary cutting machine includes a disk body having a central axis of rotation and a circumferentially extending outer periphery. A plurality of circumferentially spaced apart cutting teeth is mounted to the outer periphery of the disk body. A chip pocket is defined in the circumferential outer periphery of the disk body between each of the circumferentially spaced apart cutting teeth. Each chip pocket is formed by a chip clearance surface extending radially inwardly into the disk body to form the chip pocket between circumferentially adjacent cutting teeth. The chip pocket is adapted to receive a tooth-produced chip therein, thereby providing more room for chip discharge and thus reducing disk wear.

Abstract: An apparatus a circular blade device to produce consistent separated portions of a product to produce a severed portion, pulled and/or shredded product from cooked meat items or other food products as well as a more consistent sized crumble with precooked sausage based items.

Abstract: An accessory for a power tool includes a mounting portion configured to mate with an oscillating drive member of a power tool and a substantially planar guide portion extending forwardly of the mounting portion to a leading edge and defining a guide plane. A cantilever arm is located between the mounting portion and the leading edge. The cantilever arm extends downwardly from the guide plane and forwardly toward the leading edge. A plurality of teeth extends from a forward portion of the cantilever arm.

Abstract: A saw blade clamping device has a first clamping device for clamping a first working element and a second clamping device for clamping a second clamping element, wherein the first clamping device and the second clamping device are parallel to each other and mounted to a transmission controlling mechanism. The two clamping devices can be controlled by the transmission control mechanism to can not only clamp a single saw blade but to allow for replacement of the single saw blade by double saw blades without changing the clamping system, which enables the replacement of the saw blade to be more convenient and quick.

Abstract: To cut food material, in particular potatoes and sweet potatoes, into continuous close-loop shapes, a cutting blade assembly is used. The cutting blade assembly consists of an outer and at least one inner concentrically arranged cutting blade, where each cutting blade has a close-loop cross-sectional shape. The space between adjacent cutting blades forms a cutting tube. The cutting tubes ultimately form the cross-sectional shapes of the cut food material. Supports, such as blade guides and plungers are slidably positioned between the cutting blades in the cutting tubes. These supports maintain the distance between adjacent cutting blades and assist in separating cut food material from the cutting blades. This cutting blade assembly may be used in a method and system for cutting food material into continuous close-loop shapes.

Abstract: A circular saw blade includes a substantially planar main body having an essentially circular periphery in which are formed a plurality of annularly spaced tip support portions, and a plurality of cutting tips affixed by brazing to the tip support portions of the main body. Each cutting tip has a mounting base formed with at least two locking surfaces along which the brazing affixes the mounting base to a respective tip support portion. The locking surfaces are configured and located in relation to one another and to the main body for counteracting forces which act against the cutting tip in differing directions in the plane of the main body during rotational cutting operation of the blade.

Abstract: A saw blade includes a circular body having teeth defined in the outer periphery thereof and a central hole is defined through the center of the circular body. The circular body has an inner annular area and an outer annular area, the inner annular area extends radially outward from the central hole to a radial distance of the circular body and the outer annular area extends from the outer periphery of the inner annular area to the outer periphery of the circular body. The outer annular area is narrower than the inner annular area, the outer annular area is thinner than the inner annular area, and the teeth are thicker than the outer annular area. The thinner outer annular area does not contact the object to bet cut. The wider inner annular area supports the narrower outer annular area.

Abstract: There is provided a replaceable drywall saw blade capable of reciprocating in-line when mounted to a hand held reciprocating power saw. The blade includes a generally planar body member having a generally linear top edge and a generally parallel opposed bottom edge. The blade further includes a generally linear upper piercing edge angularly offset downwardly from the top edge. The blade additionally includes a generally linear lower piercing edge angularly offset upwardly from the bottom edge. The upper piercing edge and lower piercing edge intersect to form a forward point on said blade. A mounting aperture is also formed on the blade for releasably securing the blade to the hand held reciprocating power saw.

Abstract: A reciprocating saw blade includes a body defining a longitudinal axis, an attachment configured to couple to a reciprocating saw, and a cutting portion. The cutting portion includes a plurality of cutting teeth, each having a tip and a rake face. The saw blade also includes a plunge point for initiating a plunge cut. The plunge point includes a leading tooth having a tip and a rake face extending from the tip. The tips of the plurality of cutting teeth and the tip of the leading tooth define a plane that is generally parallel to the longitudinal axis. A first angle between the plane and the rake face of the leading tooth, measured through the leading tooth, is greater than 90 degrees. A second angle between the plane and the rake face of each cutting tooth, measured through the corresponding cutting tooth, is less than 90 degrees.

Abstract: The invention concerns a pair of saw blades, including a first blade and a second blade, which are arranged to rotate around the same rotational axis in opposite directions. Each of the blades has its own blade body and peripheral cuffing elements, wherein the blade body of the first blade has a front side, which is turned towards a back side of the blade body of the second saw blade, and wherein the cutting elements form overhangs protruding from said front or back side. Said front and/or back side have/has a circumferential ridge, which is arranged peripherally inside of the cutting elements and to slide over a corresponding part or a corresponding ridge on the opposite back side and/or front side, wherein the ridge/ridges is/are made in one piece with the blade body in question and serves/serve as a spacer means to prevent the cutting elements with their overhangs to hit each other during rotation of the blades.

Abstract: Disclosed is a tool for sawing, grinding, cutting or rasping, for a hand-held power tool appliance driven in an oscillating manner, in particular for an electric power tool driven in an oscillating manner, wherein the tool comprises at least one predetermined break line, which allows a part of the tool to be broken off.

Abstract: A cutting apparatus of a type having two juxtaposed blades 1 and 2 with each having an outermost cutting edge with teeth 12 and 13, with retention and driving of the blades adapted to effect an oscillatory motion to each of the cutting edges, characterized in that there are means to resist resonant spreading between the blades 1 and 2 when cutting which are that there is a first of the blades 1 having a first portion supported by the first blade with a part 15 which is positioned behind a part 18 of the other blade, and a second blade 2 includes a portion with the part 18 which is positioned behind the part of the first said blade.

Abstract: A saw band of steel for a band saw machine with a band back (Br) and with a tooth row arranged thereon having several teeth (20), wherein the initial tooth form (10) is triangular with a tooth base with tooth width (b) and with the tooth tip (1) with a first tooth height (h1), such that the tooth tip (1) does not project beyond tooth width (b) in the band running direction (L), wherein the lateral side of the triangle located in front in the running direction (L) forms the rake face (2) and the rear lateral side forms the clearance face (3) of the tooth (10, 20). The tooth tip (1) of the triangle is specifically removed for the development of a rounded-off tooth crest (4) with a reduced second tooth height (h2), wherein at least in the proximity of the tooth crest (4) a hard material coating covers at least partially the cutting face formed of the tooth crest (4), the rake face (2) and the clearance face (3).

Abstract: A saw blade is provided including a circular metal disc including a circular metal disc including a central aperture and a plurality of teeth spaced around a periphery of the circular metal disc. A first plurality of fully enclosed body slots are generally equally spaced from a center of the circular metal disc by a first distance and a second plurality of fully enclosed body slots are each disposed directly radially outward from a respective one of the first plurality of body slots. The second plurality of slots are generally equally spaced from the center of the circular metal disc by a second distance greater than the first distance. The saw blade design provides a blade with no modal frequencies in the operating frequency range.

Abstract: A superhard cutter element for machining a workpiece comprising wood, metal, ceramic material or composite material, the superhard cutter comprising a superhard structure (140) having a rake side (110) and a flank side (120), the rake side (110) and the flank side (120) enclosing a wedge angle ?; and a protective layer (170) bonded to the superhard structure (140) at a rake interface (180) on the rake side (110), the protective layer (170) being softer than the material of the superhard structure (140).

Abstract: A reciprocating saw blade, for use in a portable power reciprocating saw including a chuck for releasably engaging the saw blade, includes a tang having an elongated axis and being engageable with the chuck for attaching the saw blade to the reciprocating saw. The saw further includes a blade portion having a cutting edge that defines a plurality of cutting teeth. The cutting teeth define a repeating pattern of successive groups of teeth. Each group of teeth is less than about a half inch in length, and includes a plurality of laterally offset teeth, at least one relatively high first tooth and at least one relatively low second tooth. Prior to tooth set, the at least one relatively high first tooth is at least about 0.002 inch higher than the at least one relatively low second tooth.