Rotary abrasive members formed of strip-defining sheet material gathered about a hub and having pre-weakened lines defining a plurality of abrasive strips which at the periphery can separate and conform to the work piece.

A tool insert comprising an abrasive compact bonded to a cemented carbide support. The cutting edge of the tool is provided by the periphery of the compact. A plurality of recesses, each filled with abrasive compact material, extend into the cemented carbide support from the compact/carbide interface. The recesses are arranged in a series of rows, with each recess being staggered relative to its nearest neighbour in an adjacent row. In use, wear of the compact cutting edge occurs and eventually ...

An abrasive tool comprises a base and an abrasive powder bonded to the base in the form of a single-layer structure in which the particles do not substantially overlap or rest one upon another. For the bonding purpose the abrasive powder is either dispersed in a dilute solution of a binder resin and a solvent for subsequent application of the solution to the base or is spread over and fixed to a binder resin coat formed beforehand on the base.

An abrasive wheel is provided wherein coated abrasive segments are arranged annularly in interlocking pairs. Such interlocking makes it possible to assemble a greater number of abrasive segments in the wheel thus providing an abrasive wheel of improved performance.

A rotary abrasive device having a plurality of independent depending leaves mounted internally of a rotary hub structure for abrading or polishing purposes.

An abrasive wheel for grinding the cutting pins of a button-type drilling bit in a grinding machine of the kind provided with a rotatable holder for fixating the pins of the bit in a grinding position and for rotating thus fixated pins. The machine also includes a spindle on which the abrasive wheel can be mounted in a given position. The spindle/holder is linearly movable in a plane which extends through and is contained by the respective rotational axes of the holder and the spindle and in a d...

An abrasive disc which may be attached to a holder having a suction device associated therewith. The disc includes a body of soft, resilient material and abrasive layers on both sides. Apertures, openings, and orifices in the abrasive layers and in the edge of the body allow air and particles to be drawn into internal passages in the body of the disc and flow out of the body to the suction device in the holder. The apertures also facilitate attachment of the abrasive disc to the holder.

Abrasive tool mounted endwise of a shaft of a grinding machine, comprising a rigid discoidal holder, the peripheral portion of which carries a layer of abrasive grains and has the shape of a web of small thickness formed with corrugations of large relative amplitude in order to reinforce the cohesion of the abrasive grains on the holder.

A grinding and polishing device in which particles of abrasive material project outwardly from a working surface characterized by having a multiplicity of interspaced rounded protuberances and depressions which are joined together to form smoothly rounded peaks and valleys extending over substantially the entire working surface. The protuberances formed on the working surface are wearable under operating conditions so that during grinding or polishing operations, fresh abrasive particles dispose...

A polishing material is provided in which the dispersibility of the abrasive grains of the polishing material having, as a major component, rare earth oxides including cerium oxide is made better and the hardness of abrasive grain precipitates is reduced, and at the same time high efficiency of polishing can be achieved stably. According to the present invention, in a polishing material having, as the major component, rare earth oxides including cerium oxide, any one of crystalline cellulose, ca...