A polishing pad including a damping layer made of a resilient material including expanded semi-rigid polyurethane having a microcell structure, an adhesive layer including a layer of a hook-and-loop fastener adapted to interact and connect to a corresponding layer of the hook-and-loop fastener located at a bottom surface of the working element of the machine tool and a polishing layer including microfiber adapted for polishing a surface of a work piece. The polishing layer includes a fabric having a woven mesh of microfibers that define a back side of the polishing layer. The fabric serves as a barrier to the resilient material of the damping layer such that the resilient material does not reach an active side of the polishing layer comprising the microfibers when the damping layer, adhesive layer and polishing layer are combined, and such that the active side of the polishing layer is free of resilient material of the damping layer.

The present invention provides a roll shaft having high corrosion resistance and rigidity against bending, and a brush roll comprising the roll shaft. The roll shaft 2 is for use in a brush roll 1 for brushing a strip of metal sheet. The roll shaft includes: a shaft body 7 to which multiple annular discs 4 having multiple brush bristles 5 implanted around the outer peripheral edge of the discs 4 are attached; key bases 8 attached to recessed grooves 72 provided on the outer peripheral edge of the shaft body 7, the key bases comprising keyways 80 into which insertion members 6 projecting from the inner peripheral edge of the annular discs 4 are fitted, and the key bases 8 comprising a corrosion-resistant metallic material, a corrosion-resistant alloy, or a corrosion-resistant resin material.

A method for manufacturing a polishing pad for a hand tool having a working element performing an orbital, random orbital, and/or a rotational movement, the polishing pad having attached layers including: a resilient damping layer, an adhesive layer for connection to a corresponding layer located at a bottom surface of the working element, and a polishing layer including microfiber for polishing a surface of a work piece. The method includes the steps of: providing a casting mold having a recess corresponding to form of the polishing pad and a lid for closing the recess; placing the adhesive layer into the recess; pouring the resilient material for the damping layer into the recess on top of the adhesive layer; placing the polishing layer on the resilient material; closing the recess with the lid; and manufacturing the polishing pad under external heat supply until the resilient material is cured.

A blade sharpening system for log saw machines is provided. An example multiphase grinding wheel has a grinding face with one or more abrasive concentric rings for sharpening the cutting blade of the log saw machine, and one or more padded concentric rings consisting of fiber padding. Sharpening with the multiphase grinding wheel improves cut quality, increases blade life, removes glues and varnishes from the cutting blade, reduces blade deformation, and hones the edge of the cutting blade. A pneumatic tensioning system uses air bladders to apply a dynamically cushioned pressure between the grinding wheels and the cutting blade. The fiber-padded grinding wheels and the air bladder tensioner provide improved sharpness of the cutting blade and longer life for the mechanical components. The padded grinding wheels decrease fire risk, and the tensioner can be operated remotely, decreasing human injuries common with conventional setup actions near the sharp cutting blade.

A blade sharpening system for log saw machines is provided. An example multiphase grinding wheel has a grinding face with one or more abrasive concentric rings for sharpening the cutting blade of the log saw machine, and one or more padded concentric rings consisting of fiber padding. Sharpening with the multiphase grinding wheel improves cut quality, increases blade life, removes glues and varnishes from the cutting blade, reduces blade deformation, and hones the edge of the cutting blade. A pneumatic tensioning system uses air bladders to apply a dynamically cushioned pressure between the grinding wheels and the cutting blade. The fiber-padded grinding wheels and the air bladder tensioner provide improved sharpness of the cutting blade and longer life for the mechanical components. The padded grinding wheels decrease fire risk, and the tensioner can be operated remotely, decreasing human injuries common with conventional setup actions near the sharp cutting blade.

An operation control unit includes a storage device storing a program which includes commands of: obtaining a correlation between a supply position of the polishing liquid in the radial direction of the polishing pad using the liquid injection nozzle and an average polishing rate of the substrate and an distribution of the polishing rate within the substrate; determining a movable range of the liquid injection nozzle according to a predetermined range of an allowable average polishing rate and the correlation between the supply position of the polishing liquid and the average polishing rate; determining an optimal supply position of the polishing liquid from the correlation between the supply position of the polishing liquid and the distribution of the polishing rate within the substrate within the determined movable range of the liquid injection nozzle; and moving the liquid injection nozzle to the determined supply position to polish the substrate.

A brush-like grinding stone (3) in a polishing brush (1) includes a brush holder (6) and a linear member aggregate (7) detachably held in the brush holder (6). The linear member aggregate (7) includes a large number of bundles (51) of the linear members (50) obtained by hardening aggregated yarn of inorganic filaments impregnated with a resin, and a brush holder (70) holding ends of the bundles (51). A linear member holder (70) in the linear member aggregate (7) is detachably attached to each of a plurality of holding holes (68) that is open in one side in an axial line direction L. In a case where any of the linear member aggregates has a failure, such as breakage, only the failed linear member aggregate needs to be replaced. Thus, it is not necessary to discard the entire brush-like grinding stone. Consequently, the polishing cost can be reduced.

The present invention relates to a polishing system (100) for providing a polishing finish to a concrete surface, said system comprises a pad lock (2) which, one a second surface (6) thereof, comprises a number of protrusions (32) which are able to enter into engagement with a voids (16) arranged on a first surface (12) of a pad (10) placed between a fixing ring and said pad lock. The use of such a system provides a higher degree of integrity during use of said polishing system.

An abrasive article includes a plurality of abrasive particles and the rotational orientation of at least a portion of the abrasive particles about the z-axis varies randomly within a defined range, and the spacing of the abrasive particles along the y-axis varies randomly.

An abrasive article includes a plurality of abrasive particles and the rotational orientation of at least a portion of the abrasive particles about the z-axis varies randomly within a defined range, and the spacing of the abrasive particles along the y-axis varies randomly.