An abrasive wheel having an annular support disk and an abrasive ring fixed thereto comprises reinforcement layers on the front sides of the abrasive ring, a layer of an abrasive agent being disposed between the reinforcement layers. The reinforcement layers and the outer portion of the support disk overlap each other radially, at least one reinforcement layer, in this area, being connected with an annular flange of radial extension by means of an adhesive layer.

An environmentally safe abrasive composition which contains at least about 60 weight percent of ferrometalsilicate, at least about 5 weight percent of spinel, and at least about 70 weight percent of crystalline material. This composition has a Vickers hardness of at least about 550 and a density of from about 2.8 to about 4.1 grams per cubic centimeter. It is crystallized in situ from a thermally crystallizable mixture comprising from about 50 to about 75 weight percent of electric arc furnace d...

Abrasive tools, such as coated abrasives, made using radaition curable resin binders can be given a greater depth of cure of the binder if they include an acylphosphine oxide initiator.

An abrasive sheet 1 for a sanding or polishing machine, comprising a body portion 3 and a tip portion 5 providing a working point 11, the tip portion 5 being defined by a weakened region 7 between the body portion 3 and the tip portion 5, wherein the tip portion 5 can be separated from the body portion 3, turned through an angle (FIG. 2) and re-positioned adjacent the body portion 3 to change the working point 11. As a result, an iron-shaped abrasive sheet, for example, can be provided with a pl...

An abrasive sheet member is disclosed, including a substrate having first and second major surfaces, an abrasive on the first major surface, and a plurality of hooking stems on the second major surface. The hooking stems are adapted to hook engaging structures on an opposed surface to releasably affix the abrasive sheet member to the surface.

An abrasive sheet member is disclosed, including a substrate having first and second major surfaces, an abrasive on the first major surface, and a plurality of hooking stems on the second major surface. The hooking stems are adapted to hook engaging structures on an opposed surface to releasably affix the abrasive sheet member to the surface.

An abrasive body which comprises a cubic boron nitride compact bonded to a substrate. The compact has intergrowth between the cubic boron nitride particles which provides it with good thermal conductivity and has major surfaces on each of opposite sides, the one surface being bonded to the substrate and the other surface presenting a cutting edge. The substrate has a coefficient of thermal conductivity at least four times lower than that of the compact. The substrate is preferably made of alumin...

Abrasive compositions comprising a porous, organo-modified silicic acid hropolycondensate as abrasive and one or more conventional components selected from the group of carriers, adjuvants and active substances such as pharmaceuticals, disinfectants, insecticides, bactericides, etc. The compositions are useful in medical and cosmetic applications, such as in the treatment of acne or as a tooth paste, and also in various technical and industrial fields, e.g., as a polishing or cleansing material.

An abrasive article comprises abrasive grain, a binder material and active fillers. The active fillers are metal halogenides or metallic complex salts.

The invention provides an abrasive body suitable for mounting in a tool for abrading operations, the body including an abrasive compact comprising a mass of abrasive particles, present in an amount of at least 70 percent by volume of the compact, bonded into a hard conglomerate and support means covering a part of the surface of the compact and bonded to the compact, characterized in that the support means covers more than 50 percent of the surface of the compact and the compact presents an arcu...