Abstract: Dust and debris resulting from the sawing or cutting of concrete masonry units, blocks, bricks, tiles and other masonry products is collected via a three point dust and debris collection system. A movable work supporting table for cooperation with a masonry saw has a grated surface, a vacuum chamber below the grated surface acting as one collection point or area, a heavy debris collection chamber below and in communication with the table vacuum chamber acting as another collection point or area, and a shroud or hood assembly extending rearwardly from the table adapted to extend about the sides and rear of the saw blade and including a vacuum chamber acting as a primary collection point or area. The system is highly effective in achieving dust capture.

Abstract: A repair assembly for the skid plate of a circular saw and its associated method of repair. If a circular saw has a skid plate that is worn to a point where it needs replacement, this repair assembly is used to reinforce the worn skid plate so it can again be used. The repair assembly includes a secondary plate structure having a flat base. The secondary plate structure is mounted directly onto the worn skid plate. The secondary skid plate covers the wear surfaces of the worn skid plate, therein providing new wear surfaces. The repair assembly attached over the worn skid plate so the worn skid plate does not have to be removed.

Abstract: A rotary cutting saw including: (a) a base disk which has a plurality of apertures formed therethrough and opening in axially opposite end surfaces thereof; (b) a plurality of abrasive segments which are fixed to an outer circumferential surface of the base disk; and (c) a plurality of axial-runout restraining members which are received in the apertures. Each of the axial-runout restraining members has a size which is smaller than a size of each of the apertures, such that a clearance is defined between the periphery of each of the apertures and a corresponding one of the axial-runout restraining members which is received in the each of the apertures. A ratio of a size of the clearance to the size of each of the axial-runout restraining members is 5–150%.

Abstract: A concrete engraver apparatus including a carrier for use with a hand-held engraver. The hand-held engraver is detachably mounted to the carrier. The carrier has wheels and a handle attached to an enclosure. The enclosure includes a vacuum mount for attaching a vacuum tube to evacuate loosened particles from the enclosure during operation of the hand-held engraver.

Abstract: A cutting tool, in particular a tile cutting tool, with a base body, which can be clamped into a tool-holding device of a machine tool and driven to rotate, and with a cutting head that is set with cutting particles, and at least the cutting head and the base body are comprised of separate components and that the component, which constitutes the cutting head, is designed to be replaceably fastened to the base body by a detachable connection and the base body has a receptacle for containing coolant.

Abstract: To prevent a blowout nozzle from colliding with a workpiece due to a trouble of a backpressure sensor so as to avoid damage to the workpiece in a processing apparatus provided with a backpressure sensor, the backpressure sensor is formed capable of being freely moved at the blowout nozzle thereof in the air blowout direction and in the direction opposite thereto, and provided with a free-movement detecting sensor adapted to detect an actual free-movement of the blowout nozzle.

Abstract: A wheeled trolley carries various tools across an object to be worked. A track attaches directly to the work and simultaneously isolates the tool from the work. A standard connection to the trolley readily accommodates a variety of diverse tools, using a keyway or the like to ensure accurate and repeatable placement of the tools. A preferred contouring guide allows a tool to be moved through an arc, where the focal point of the arc may be set to produce an infinite variety of custom shapes, bevels or angles of cut. An upper stop is provided which readily sets the break line between surface finish and edge contour. An adjustable tool carriage allows control over both position and force, including preloading a work tool with force. Resilience is incorporated into the apparatus to accommodate diverse hardness and abrasion characteristics, and, in at least one embodiment, to enable the track to accurately follow a warped or sagging work piece.

Abstract: A concrete saw has a rotating cutting blade that rotates in a first plane to cut a groove in a concrete surface. The blade is guided along that groove by two guides. A rolling or sliding support member on opposing sides of each guide roll or side along the concrete to support the saw blade on the concrete and to position the blade relative to the concrete. The guides and rollers are advantageously on opposing sides of the blade. The guide can be a sliding member but is preferably a rolling disc sandwiched between two rolling supports. A diverter can prevent debris from the blade from getting under the movable support.

Abstract: A bladeshaft assembly for a cutting saw includes a hollow tubular housing member. A shaft member extends coaxially through the tubular housing member and has at least one end that extends outwardly of the tubular housing member. At least one bearing member is disposed in surrounding relation to a portion of the shaft member. A seal is provided for sealing around the at least one end of the shaft member. A pulley member is mounted on the at least one end of the shaft member that extends outwardly of the tubular housing member. A tapered fit is formed cooperatively between the pulley member and the end of the shaft member so as to enable a press fit relation between the pulley member and the end of the shaft member. Additionally, first and second gauge points are formed respectively between the pulley member and the at least one end of said shaft member; the first and second gauge points engaging one another so as to establish a predetermined placement of the pulley member on the end of the shaft member.

Abstract: A telescopic guide for a concrete saw includes a plurality of sleeves, a wheel and mounting plate.

Abstract: An apparatus for positioning dicing saw blades at a fixed axial distance from one another independent of the thickness of the saw blades, where the saw blade thickness varies within a range. Flanges, spacers, and retention spacers may be employed to achieve desired spacing of dicing saw blades in the assembly. At least one biasing element that is at least partially constrained about its outer radial periphery may be employed to achieve axial positional independence of each dicing saw blade with respect to other dicing saw blades of the assembly. Further, at least one retention feature may also be used to fix the position of the at least one biasing element in the assembly. Machining techniques may be used to form the components and features of the present invention.

Abstract: A cutting guide arrangement cutting guide arrangement, which is incorporated with a power saw machine which includes a cutting platform, having a cutting channel, for supporting a work piece thereon and a cutting blade overhung above the cutting platform for cutting the work piece along the cutting channel, includes a primary guider detachably mounting on the cutting platform in a slidably movable manner. The primary guider includes a guiding arm and a plurality of rip guides provided thereon, wherein each of the rip guides has a guiding edge, which is 45 degrees with respect to the cutting channel, adapted for selectively guiding an edge of the work piece to align a diagonal of the work piece with the cutting channel of the cutting platform.

Abstract: A cutting machine includes a bottom collecting tray, a cutting blade overhanging on a cutting table and having a cutting area defined at an outer circumferential portion thereof when the cutting blade cuts the work piece, and an environment control arrangement. The environment control arrangement includes an end collecting tray, which is upwardly extended from the bottom collecting tray, having a collecting chamber for collecting residual particles of the work piece while the cutting blade cuts the work piece, wherein the end collecting tray must be upwardly extended to a position above the cutting area of the cutting blade, and a suction source having a sucking inlet provided at a lower portion of the end collecting tray for collecting the residual particles within the collecting chamber by means of sucking effect.

Abstract: A portable machine, for example a saw, has a light construction using composite materials such as fiber reinforced resins and a closed cell foam. The saw may have a housing formed from multiple skins of the composite materials in which in the closed cell foam. Metallic inserts may be used to bond to either or both of the foam and the composite skin to accept working components. A saw is also described which uses gears sharing the same support element.

Abstract: A machining apparatus comprises a rotating spindle mounted rotatably, a rotating drive source for rotationally driving the rotating spindle, a rotary tool detachably mounted on the rotating spindle, and a screwed member rotated and screwed to the rotating spindle for mounting the rotary tool on the rotating spindle. The machining apparatus is further provided with selective rotation inhibiting means for selectively inhibiting the rotation of the rotating spindle.

Abstract: A method is disclosed for constructing non-seamed stone corners for use on outside edges formed by joining thin stone walls at right angles. Thin stone is used to lay the field of the walls. Then a building stone is oriented and fed down a chute, having perpendicular sides, through two stone cutting saws at right angles to one another, where the distance between the saw blades and the sides of the chute correspond to the thickness of the respective thin stone walls, and where the cutting edges of the saw blades have a clearance between them of about one-eighth of an inch. A residual piece is removed from the cut building stone, leaving a corner stone. These corner stones are laid on the corner formed by the right angle joint between the walls, giving the illusion of a thick building stone wall with nearly the low cost and easy laying of thin stone. Where the residual piece is large enough, it is used to cut a second corner stone in the same manner.

Abstract: The present invention relates to a saw blade for cutting and finishing the surface of a work piece. The saw blade having a set of teeth disposed about the outer edge for making a cut in a work piece and an abrasive secured to the lateral surface of the saw blade. The abrasive extending laterally outwardly from the surface of the saw blade and providing a finishing effect on the work piece as the abrasive widens the cut beyond the cut of the saw blade teeth. A method for cutting and finishing a surface of a work piece utilizing a saw blade with an abrasive secured to a lateral surface of the blade and the abrasive extending beyond the cut of the saw blade teeth.

Abstract: A saw cutting pattern is dynamically established for a semiconductor dicing saw based on detection of the saw blade contacting a wafer or a portion of a wafer. The dynamic cutting pattern may terminate cuts if the saw blade no longer contacts the wafer or a portion of a wafer. Thus, irregular shaped wafers may be cut without requiring that an entire predefined cutting pattern be carried out and/or without previously mapping the shape of the wafer or portion of a wafer. A map of the wafer or a portion of a wafer may also be generated based on the detection of the saw blade contacting the wafer during a first cutting pass and may be used during a second cutting pass.

Abstract: Improperly mounted wafer saw blades can damage wafers cut or diced with the blades. Embodiments of this invention employ sensors to measure a distance to the blade to help indicate if the blade is improperly mounted. In one method of the invention, a the distance to the blade face is measured as the blade is rotated and a variance in this measured distance is determined. If the variance is no greater than a predetermined maximum, the blade may be used to cut the wafer. In one apparatus of the invention, a wafer saw include a blade and a sensor. The sensor is adapted to monitor a distance to a face of the rotating blade. A processor coupled to the sensor may indicate if the distance to the face of the blade as it rotates deviates too far from a baseline position of the blade face.

Abstract: This invention relates to an abrasive cutting tool comprising: i) a substrate surface having a plurality of teeth extending therefrom, and ii) a single layer of abrasive grains chemically bonded to at least a portion of each tooth to define a plurality of cutting levels parallel to the substrate surface, the cutting levels comprising a first uppermost cutting level and a second uppermost cutting level, the grains having a predetermined concentration, size and toughness, whereby the abrasive cutting tool has a cutting surface with a negative angle of inclination with respect to an intended direction of cutting.

Abstract: A tile positioning device of a tile cutting machine includes a first piece slidably engaged with the gauge and a second piece is pivotably connected to the first piece. The second piece includes two protrusions and a right angle is defined between two surfaces of the two protrusions for clamping two sides of a tile and the tile can be rotated relative to the blade of the cutting machine by rotating the second piece. A third piece is optionally and pivotably connected to one of the two protrusions for adjusting the positioning of the tile.

Abstract: A semiconductor wafer saw for dicing semiconductor wafers comprises variable lateral indexing capabilities and multiple blades. The wafer saw, because of its variable indexing capabilities, can dice wafers having a plurality of differently sized semiconductor devices thereon into their respective discrete components. In addition, the wafer saw with its multiple blades, some of which may be independently laterally or vertically movable relative to other blades, can more efficiently dice silicon wafers into individual semiconductor devices.

Abstract: A work table includes a work surface having two generally parallel bars extending across and above the work surface. Two sleeves are slidably connected to the two generally parallel bars, each sleeve of the two sleeves positioned around each bar of the two generally parallel bars. A power tool, such as a tile saw is connected between the two sleeves and thereby slides along the two bars. A channel is preferably positioned across the work surface and includes water or similar coolant/lubricant for the power tool. Handles are additionally positioned in the side of the work surface and are moveable between a retracted position within the work surface and an extended position away from the work surface. In the extended position, the handle includes a top edge generally flush with the work surface.

Abstract: A blade angle adjustment device for a stone cutter includes a framed base having a working table slidably disposed on the base including a vertical cutting groove and a slant cutting groove in upper surface, a tool plate and a support arm respectively secured to a lateral side thereof, a L-shaped link having pair of screw holes in a longitudinal portion engaged with a screw hole and oblong hole on the top of the support arm and secured by a screw and a first swivel lock, a screw hole and an arcuate slot in a transverse portion respectively engaged with the front ends of a large and a small internally threaded large and small connection rods and secured by a second swivel lock and a handled screw, a motor protected by an upper housing and a lower housing which is connected to the rear end of the connection rods and a guarded circular blade connected to an axis of the motor so that slides the first swivel lock in the oblong hole to define the elevational angle for the cutting mechanism and slides the small conn

Abstract: Centering elements for effectively reducing the clearance between a shaft and a rotatable element, such as a blade-fixing flange of a dicing saw for semiconductor substrates or carrier substrates, installable thereon are disclosed. In addition, the centering elements may be used to substantially align a center of mass of a rotatable element installed onto the shaft with the axis of rotation of the shaft. The centering element may position the center of mass of a rotatable element at a position that is in substantial alignment with the axis of rotation. Methods for assembling rotatable elements onto shafts and methods for balancing such rotatable elements are also disclosed. Multiple fixtures as well as multiple centering elements may be employed. In addition, one centering element may position more than one fixture.

Abstract: A method and system for dicing a semiconductor wafer providing a structure with greatly reduced backside chipping and cracking, as well as increased die strength. Semiconductor chip structures obtained from wafers diced according to this invention are also encompassed.

Abstract: A machine for cutting holes in concrete slabs comprises a connector adapted to be secured to an adapter of a front-end loader. Secured to the connector is a first frame structure that includes an elongated tube and a support foot for engaging the surface of a concrete slab and supporting the first frame structure. Confined within the elongated tube of the first frame structure is a beam that is slidable back and forth therein. One end portion of the beam extends from the elongated tube. A second foot structure extends downwardly from the one end portion of the beam to where it may engage the surface of the concrete slab. Secured directly or indirectly to the elongated beam is a concrete hole cutting saw unit that includes a drum type concrete saw. Interconnected between the beam and the first frame structure is a hydraulic cylinder that is operative to move the elongated beam and saw cutting unit back and forth between a retracted and extended position.

Abstract: A method of cutting, along the cutting streets, the CSP substrates in which CSPs are formed on each of plural rectangular regions thereof sectioned by the cutting streets arranged in a form of a lattice. The method comprises the steps of mounting plural CSP substrates on a single frame without overlapping them one upon the other, recognizing the mounting position of each of the CSP substrates on the frame and storing the mounting positions in a storage means, securing the frame mounting the plural CSP substrates onto a chuck, imaging the surface of each of the CSP substrates by a precision imaging means, and recognizing the positions of the cutting streets of each of the CSP substrates by analyzing the obtained image and storing the positions of the cutting streets of the storage means.

Abstract: A method and apparatus for providing radiused corners on a crack control groove is provided. A radius on the two opposing corners of the crack control groove is simultaneously formed by inserting a pilot segment of a rotating cutting blade into the groove to chase the groove with the blade. The cutting blade has side cutting segments on opposing sides of the pilot segment. The side cutting segments have a concave shape with abrasive material thereon and are located and sized to cut a predetermined radius on the opposing corners 32. Convex shaped shoulder segments inhibit the formation of a well if the blade cuts too deeply. The pilot segment advantageously has no abrasive on its sides so it does not widen the groove, and the pilot segment is shorter than the depth of the groove so it does not deepen the groove.

Abstract: A work cutting apparatus comprises a bed. The bed has an upper surface provided with a column including a rail slidably mounted with a slider. The slider has a front surface mounted with a supporting portion supporting two end portions of a rotating shaft. The rotating shaft is mounted with a plurality of cutting blade blocks. Each of the cutting blade blocks includes a plurality of cutting blades and a thicker cutting blade at each end of the cutting blade block. A table provided with a recess having a V-shaped section is disposed on the bed right beneath the cutting blade blocks. A plurality of works are disposed in the recess, each fixed by a fixing member. The cutting blades lowered while rotating, thereby cutting the works. During this operation, coolant is discharged from a plurality of supplying ports of a coolant supplying portion as well as from a supplying port of a coolant supplying path.

Abstract: An improved portable stone cutter includes a base which is of a rectangular frame composed of a plurality of longitudinal bars, a pair of transverse bars and a pair sliding bars, a working table slidably secured to the sliding bars, a motor disposed on the front end of the frame and sustained by an arcuate support arm and a supplementary support arm which are releasably and rotatably secured to a pair of outmost longitudinal bars, a guarded circular saw blade connected to the motor and operated by the motor via a belt and a transmission shaft and a tool plate movably disposed to one of the outmost longitudinal bars. The feature is that the arcuate support arm and the supplementary support arm define a large space to permit a large piece of stone passing through the saw blade and both the supplementary support arm and the tool plate are removable to reduce the volume of the stone cutter to conveniently pack for transportation.

Abstract: A tile cutter includes a cutting wheel, a motor which drives the wheel in use, and a main housing body and a worktop mounted on the main housing body to define a cutting surface upon which tiles may be supported when being cut. The main housing body includes a first compartment for housing the motor and a second compartment for housing the cutting wheel. The second compartment defines an open topped water compartment. The worktop has a main body fixedly secured to the main housing body and has an access opening closed by a movable access lid overlying the second compartment to close the open top of the water compartment. The access lid provides access to the water compartment. The worktop further includes one or more open topped drainage channels communicating with the cutting surface and the water compartment to permit, in use, water to drain from the cutting surface to the water compartment.

Abstract: The multi-blade concrete cutting saw cuts blocks of concrete or aerated concrete into equal sized slates with one pass through the saw. The cutting saw is supported by a frame having a base, an upper support structure and a pair of guide rails. A conveyor track transports the concrete blocks through the cutting saw. A concrete block is forced along the conveyor track and passes through six equally spaced, diamond tipped cutting blades. Each of the resultant slates have equal dimensions and weight. The cutting blades are disposed along a drive shaft and are arranged across the width of the conveyor track. The cutting blades are driven in a counterclockwise direction by a drive belt that connects the drive shaft to a motor. The conveyor track may be automatically driven by a pair of belt drives.

Abstract: A rotatable cutting tool unit of a tool assembly for a cutting machine that is used in conjunction with an associated method of cutting provides several novel aspects. The tool arrangement, which includes two tool units, includes first and second disk-shaped tools rotatable about an axis. The tools define maximum tool arrangement boundaries along the axis. A driving arrangement, at an axial location between the first and second tools, supports the first and second tools for rotation and transfers driving force. A radially outer periphery of the driving arrangement is at a radius less than a radius of a peripheral cutting edge portion of the first tool and less than a radius of a peripheral cutting edge portion of the second tool.

Abstract: A circular saw includes a worktable, a mounting seat extending upwardly from the worktable for mounting a motor thereon, a blade supporting unit pivotally mounted on the mounting seat at a pivot end so that an opposite free end is turnable to be close to and away from the worktable, and a saw blade shaft mounted rotatably on the blade supporting unit about a blade axis parallel to an output shaft axis of an output shaft of the motor and having a saw blade mounted thereon. The saw blade shaft is coupled to the output shaft by a drive transmitting unit which transmits driving force of the output shaft to the saw blade shaft so as to rotate the saw blade.

Abstract: The present invention is directed to a coring drill and method for preparing a block for containing a receptacle assembly. The coring drill comprises a generally cylindrically-shaped corer hub having a longitudinal drilling axis. A generally cylindrically-shaped first corer has a first-corer axis coaxial with the longitudinal drilling axis and a first coring end having a first-coring diameter. The first-corer is removably attachable to the corer hub. A generally cylindrical-shaped second corer has an second-corer axis coaxial with the longitudinal drilling axis and a second coring end having a second coring diameter greater than the first coring diameter. The second-corer is attached to the corer hub. A generally cylindrical-shaped counter-borer has a counter-borer axis coaxial with the longitudinal drilling axis and a counter-boring end having a third coring diameter greater than the second coring diameter. The counter-borer is attached to the corer hub.

Abstract: A method and mechanism for slicing a thin film wafer. A closure is bonded to a section of a thin film wafer. A blade is used to slice a row from the section of the wafer by cutting through the closure and thin film wafer such that opposite sides of the blade engage an equal surface area of the closure.

Abstract: A masonry cutter comprising a tripod having legs for straddling the masonry to be cut and a cutting assembly mounted between the legs. The cutting assembly comprises a cutting element, preferably a circular saw, and a means for operating the cutting element. The legs may be vertically adjustable. Adjustment of the legs permits changing the angle between a plane parallel to the cutting element and a plane parallel with the masonry to be cut. The tripod may be mounted to a frame by means of a pivot with a vertical pivot axis passing through the pivot. This allows the tripod legs to be positioned and the cutting assembly to be oriented so that the first and second axes are in a desired direction with reference to the masonry to be cut. In one embodiment, the masonry to be cut is a sidewalk slab and the apparatus is used to remove trip hazards from the sidewalk slab. The masonry cutter may be removably mounted to a vehicle.

Abstract: Base seat of a pneumatic grinder, including an air way and a water way disposed in the base seat to respectively communicate with an air chamber and a water chamber formed in the base seat. Several water outlets and a predetermined number of air rooms are disposed on a bottom face of the base seat. The water outlets communicate with the water chamber, while the air rooms communicate with the air chamber. Multiple ball bodies are respectively rollably disposed in the air rooms, the bottom edge of the ball bodies protrude from the bottom face of the base seat. When high pressure air and water are conducted into the air way and water way, the air is conducted by the air way to flow into the air chamber and to blow to the ball bodies in the air rooms making the ball bodies rolling easily. The water flows through the water way into the water chamber and then flows through the water outlets out of the bottom face of the base seat to reduce frictional force against the bottom face of the base seat.

Abstract: A dicing machine including a flange cover which covers the blade and is divided into two such that a first cover is openable. An interlock device is provided so that a blade attaching and detaching device cannot be attached when the first cover is at the closing position, the first cover cannot turn to the closing position when the blade attaching and detaching device is attached, and the processing of the work is not started when detected radiation of a blade breakage detector, attached to the first cover, is not reduced by a predetermined amount. Consequently, the blade and the work are prevented from being damaged by processing the work without applying coolant, the mechanism of the dicing machine and the blade attaching and detaching device are prevented from being damaged without detaching the blade attaching and detaching device, and the work is prevented from being being unprocessed.

Abstract: A saw includes a base having a first length extending generally along a first direction, a table disposed on the base, a saw unit disposed on the base, wherein one of the table and the saw unit is movable relative to the base along the first direction over a range which exceeds the first length. The saw may also include a first stationary rail connected to the base and extending generally along the first direction and a first movable rail engaging the first stationary rail and extending generally parallel to the first stationary rail, the first movable rail being connected to the one of the table and saw unit. Preferably, the first movable rail is slidingly received over the first stationary rail. The saw may also include a first rack disposed on the first movable rail, and a first pinion disposed on the base, wherein the first pinion meshes with the first rack so that the first movable rail moves along the first direction upon rotation of the first pinion.

Abstract: When a work W is cut by moving a wire in an axial direction thereof while the wire is pressed onto the work and an abrasive liquid which is made by dispersing abrasive grains in a dispersion medium is interposed between the work and the wire, a flow of the wire is formed, and the wire is pressed onto the work while moving under the liquid level of the abrasive liquid whose flow is formed. The work is cut in the abrasive liquid so that a sufficient amount of the abrasive grains can be supplied between the work and the wire for a long time.

Abstract: The multi-blade concrete cutting saw cuts blocks of concrete or aerated concrete into equal sized slates with one pass through the saw. The cutting saw is supported by a frame having a base, an upper support structure and a pair of guide rails. A conveyor track transports the concrete blocks through the cutting saw. A concrete block is forced along the conveyor track and passes through six equally spaced, diamond tipped cutting blades. Each of the resultant slates have equal dimensions and weight. The cutting blades are disposed along a drive shaft and are arranged across the width of the conveyor track. The cutting blades are driven in a counterclockwise direction by a drive belt that connects the drive shaft to a motor. The conveyor track may be automatically driven by a pair of belt drives.

Abstract: A sawing system (200) incorporates a vision zone (220) between a loading/unloading zone (115) and a sawing zone (210). This arrangement allows a dual spindle counter rotating saw assembly (230) to be more rigidly mounted, which reduces the displacement of the saw assembly during the sawing process. This, advantageously reduces the variation in the cut made by the saw blades of the saw assembly to comply with a predetermined required tolerance. In addition, with the vision zone (220) located between the loading/unloading zone (115) and the sawing zone (210), a semiconductor wafer or substrate is transported from the loading/unloading zone (115) to the vision zone (220) without passing the sawing zone (210). Consequently, exposure of a semiconductor wafer or substrate to water or debris from the sawing process is avoided, and imaging can be performed at the vision zone (220) without water or debris adversely affecting the imaging.

Abstract: Apparatus for cutting a chamfer on an upper edge of a concrete slab includes a hub designed for installation on the threaded output spindle of an angle grinder, and a specially-modified diamond-grit-edged rotary blade which mounts on the hub. For a preferred embodiment of the hub, an attachment collar is unitary and concentric with both a blade mounting flange having countersunk blade-attachment screw holes and a blade centering shoulder on the flange. The attachment collar has at least one pair of flattened parallel sides for receiving a wrench used to tighten the hub on the output spindle. The blade which is equipped with both countersunk attachment holes and a central positioning aperture sized to fit closely over the blade centering shoulder, is attachable with countersinking screws to the mounting flange so that the head of each screw is flush with the surface of the blade.

Abstract: This invention relates to a method of cutting, comprising the steps of: a) providing an abrasive cutting tool comprising: i) a substrate surface having a plurality of teeth extending therefrom, and ii) a single layer of abrasive grains chemically bonded to at least a portion of each tooth to define a plurality of cutting levels parallel to the substrate surface, the cutting levels comprising a first uppermost cutting level and a second uppermost cutting level, the grains having a predetermined concentration, size and toughness, b) moving the substrate surface in an intended direction of rotation, c) contacting the uppermost cutting level of at least one tooth to a workpiece at a point of contact, d) applying a constant force to the tool directed at the point of contact, wherein the constant force is sufficient to cut the workpiece, the strength of the bond is sufficient to resist peeling, the predetermined concentration, size and toughness of the plurality of grains are such that the grains of the uppe

Abstract: A device for attaching two units (17,18) provided for rotation in unison about an axis, having axial and radial attachment of the units relative to each other. The attaching involves first engagement members (28,29) engageable with each other and provided on the first and second units, the engagement members being arranged to cause engagement with each other by radial relative moment between the units (17,18).

Abstract: Abrading and cutting devices such as saws include waste containment systems and methods to improve removal of slurry or other contaminants from a work area during operations, and separation of slurry from a carrying medium such as air. A blade guard includes fluid channels, and may be removable from a blade guard carriage. The carriage may be used to minimize any need to readjust the blade guard position when the blade guard is returned to the carriage for further use. A vacuum bar may be included on the carriage. A vacuum pickup assembly may be used with a blade guard, and the vacuum assembly may include separate and/or different vacuum pickup configurations.

Abstract: It is an object of the present invention to provide a method for slicing a hard and brittle material having a crystal structure, such as a silicon ingot, and more particularly a hard and brittle material cutting method which solves the problem of worsening variance in thickness, nanotopography, and wafer warpage. The inventors perfected the present invention upon discovering that when retainer plates are bonded to or pressed against the ends of an ingot, and simultaneous slicing with a wire saw is performed along with the retainer plates, a portion of increasing variance in the warpage, nanotopography, and thickness will appear in the portions corresponding to the retainer plates, resulting in a decrease in variance in wafer warpage, nanotopography, and thickness at the ends of the targeted ingot.

Abstract: A thin stone cutting apparatus and method includes a groove cutting device for cutting a groove in a side of a block of stone along a first cutting plane. A block cutting device cuts each block of stone in a direction from an opposite side of the block. A block cutting device cuts each block along a second cutting plane co-planar with the first cutting plane. Alternatively, the first and second cutting planes of the groove cutting device and the block cutting device can be at different angles to one another. A block holder device includes a linear member received in a groove of each block when each block is being cut by the block cutting device. A conveyor is provided for moving each block relative to the block cutting device where the linear member of the block holder device is mounted to the conveyor. Alternatively, the block cutting device is moveable relative to the block holder device. The resulting stone includes a rock body made from natural stone and having a front, and an opposite facing back.