An abrasive article including a bonded abrasive body coupled to a core, the core includes a composite material including an organic material and a metallic material, and the composite material includes at least a first filler that can include nitrides, carbides, borides, oxides, silicates, or a combination thereof.

A grinding wheel includes a disc-like member and a grinding stone layer disposed on an outer peripheral surface of the disc-like member. A grinding surface of the grinding stone layer includes a cylinder grinding surface, end grinding surfaces, and corner grinding surfaces. The grinding stone layer includes a cylindrical-portion grinding stone layer including a part of the corner grinding surfaces and the cylinder grinding surface, and end grinding stone layers including the remaining part of the respective corner grinding surfaces and the respective end grinding surfaces and having a property different from a property of the cylindrical-portion grinding stone layer. Joint surfaces are each formed by joining a boundary surface of the cylindrical-portion grinding stone layer and a boundary surface of the end grinding stone layer such that the boundary surfaces have a preset inclination to an axis of rotation.

A grinding wheel includes a disc-like member and a grinding stone layer disposed on an outer peripheral surface of the disc-like member. A grinding surface of the grinding stone layer includes a cylinder grinding surface, end grinding surfaces, and corner grinding surfaces. The grinding stone layer includes a cylindrical-portion grinding stone layer including a part of the corner grinding surfaces and the cylinder grinding surface, and end grinding stone layers including the remaining part of the respective corner grinding surfaces and the respective end grinding surfaces and having a property different from a property of the cylindrical-portion grinding stone layer. Joint surfaces are each formed by joining a boundary surface of the cylindrical-portion grinding stone layer and a boundary surface of the end grinding stone layer such that the boundary surfaces have a preset inclination to an axis of rotation.

An apparatus may include a grinder blade for flush cutting concrete, the grinder blade comprising: a distal side that defines a flush cutting plane and a proximal side opposite the distal side, and a locking hub receiver section unitarily formed from the grinder blade at a center portion and extending from the grinder blade a proximal direction to receive a locking hub with a plurality of fasteners disposed proximally to the grinder blade to secure the locking hub against the grinder blade.

An apparatus may include a grinder blade for flush cutting concrete, the grinder blade comprising: a distal side that defines a flush cutting plane and a proximal side opposite the distal side, and a locking hub receiver section unitarily formed from the grinder blade at a center portion and extending from the grinder blade a proximal direction to receive a locking hub with a plurality of fasteners disposed proximally to the grinder blade to secure the locking hub against the grinder blade.

A fixed abrasive article having a body including abrasive particles contained within a bond material, the abrasive particles including shaped abrasive particles or elongated abrasive particles having an aspect ratio of length:width of at least 1.1:1, each of the shaped abrasive particles or elongated abrasive particles having a predetermined position or a predetermined three-axis orientation.

A fixed abrasive article having a body including abrasive particles contained within a bond material, the abrasive particles including shaped abrasive particles or elongated abrasive particles having an aspect ratio of length:width of at least 1.1:1, each of the shaped abrasive particles or elongated abrasive particles having a predetermined position or a predetermined three-axis orientation.

A grinding wheel sharpening device which is mountable a rotary power source. Each of the several configuration of the grinding wheel sharpening devices comprises a grinding wheel body having a drive shaft, the drive shaft configured to be mounted to a rotary power source and adapted to be powered and driven by the rotary power source, at least one abrasive sharpening surface, and a blade rest within which the grinding wheel is disposed during use, the blade rest enabling precision shaping and/or sharpening of a blade.

A grinding wheel sharpening device which is mountable a rotary power source. Each of the several configuration of the grinding wheel sharpening devices comprises a grinding wheel body having a drive shaft, the drive shaft configured to be mounted to a rotary power source and adapted to be powered and driven by the rotary power source, at least one abrasive sharpening surface, and a blade rest within which the grinding wheel is disposed during use, the blade rest enabling precision shaping and/or sharpening of a blade.

A flattening tool that manages debris and a method for making a flattening tool that manages debris. As non-limiting examples, various aspects of this disclosure provide various flattening tool structures, and methods for making thereof, that comprise a feature for managing debris, for example debris resulting from utilization of the flattening tool.