Abstract: Object: To provide a grinding wheel and a method of manufacturing a grinding wheel having added value while providing a suppressed manufacturing cost. Solution Means: The grinding wheel is a grinding wheel including an abrasive portion including nonwoven fabric, wherein the abrasive portion includes an outer peripheral portion formed with the nonwoven fabric including abrasive grains on an outer peripheral side, and an inner peripheral portion formed with the nonwoven fabric not including the abrasive grains, and a ratio of a thickness in a radial direction of the outer peripheral portion to a thickness in a radial direction of the abrasive portion is from 3% to 60%.

Abstract: An abrasive material containing a cured product of a thermosetting resin powder, comprising: a porous body having a plurality of bubbles derived from heat-expandable microspheres; and abrasive grains dispersed in the porous body.

Abstract: An adapter according to one aspect is an adapter for fixing to a shaft of a grinding machine a grinding wheel having a through-hole where the shaft is inserted. The adapter is provided with a main body having at least a portion thereof inserted into the through-hole, the main body including an outer wall that contacts a wall of the through-hole and an inner wall that forms an opening that corresponds to the shaft, and a plurality of reinforcing parts provided in predetermined intervals along a circumferential direction of the main body. Each reinforcing part extends from the inner wall to the outer wall, and a notch is formed in each reinforcing part.

Abstract: A polishing cushion for realizing a plurality of types of polishing with a single polishing apparatus. A polishing cushion according to one embodiment includes a first outer layer facing one out of a polishing member and a support member, a second outer layer facing the other out of the polishing member and the support member, an inner layer positioned between the first outer layer and the second outer layer; and a plurality of spaces formed in the second outer layer which the inner layer is able to enter. The hardness of the inner layer is lower than both of the hardness of the first outer layer and the hardness of the second outer layer.

Abstract: An adapter according to one aspect is an adapter for fixing to a shaft of a grinding machine a grinding wheel having a through-hole where the shaft is inserted. The adapter is provided with a main body having at least a portion thereof inserted into the through-hole, the main body including an outer wall that contacts a wall of the through-hole and an inner wall that forms an opening that corresponds to the shaft, and a plurality of reinforcing parts provided in predetermined intervals along a circumferential direction of the main body. Each reinforcing part extends from the inner wall to the outer wall, and a notch is formed in each reinforcing part.

Abstract: To provide an abrasive material product which shows an excellent effect of controlling heat generation in abrasive work and which causes no smearing in abrasive work in dry mode. An abrasive material product comprising a binder and an inclusion compound composed of a host compound and a lubricant contained therein as a guest compound.

Abstract: The invention provides a nonwoven fabric abrasive material, which comprises a reactive inorganic endothermic compound.

Abstract: To provide an abrasive material product which shows an excellent effect of controlling heat generation in abrasive work and which causes no smearing in abrasive work in dry mode. An abrasive material product comprising a binder and an inclusion compound composed of a host compound and a lubricant contained therein as a guest compound.

Abstract: To provide an abrasive disc which has a small size in the thickness direction and, therefore, can grind objects easily even if they are narrow portions or side walls of grooves and which has a strength enough for resisting the force applied during grinding. Means for Solution An abrasive disc which comprises a disc-shaped laminate comprising a layer of a nonwoven abrasive material, a layer of a reinforcing fabric connected to one side of the layer of the nonwoven abrasive material, a central opening, an almost flat front surface and an almost flat back surface; and a grinder-mounting resin portion, the grinder-mounting resin portion being formed integrally with the disc-shaped laminate by insert-molding a resin at the peripheral portion of the central opening in the disc-shaped laminate.

Abstract: A process, multi-functional grinding wheel and apparatus for mirror-finishing the edge of at least one of a cut unfinished glass recording disk or a cut unfinished glass-ceramic recording disk.