Abstract: An abrasive disc comprises a disc substrate having a peripheral portion, plural abrasive chips each having an abrasive layer on a metal piece and being arranged in the peripheral portion of the disc substrate with a predetermined space, a suspension plate placed between the disc substrate and abrasive chips, and an elastic sheet placed between the disc substrate and the suspension plate so as to isolate the disc substrate from the suspension plate in order to absorb mechanical shock generated in operation of the abrasive disc. The abrasive chips are fastened to the suspension plate. Each of the abrasive chips has abrasive surfaces including a top abrasive surface and peripheral surfaces and the outer peripheral portion and the inner peripheral portion are declined to the top surface.

Abstract: An abrasive disc which has plural abrasive chips having an abrasive layer on a metal piece and being arranged in a peripheral portion of a disc substrate with a predetermined space comprises a suspension plate placed between the disc substrate and abrasive chips and an elastic sheet placed between the disc substrate and the suspension plate, wherein the disc substrate consists of a plastic resin including fiber, the abrasive chips have stakes therein and the suspension plate has through-holes to which the stakes are deformed therein. Each of the abrasive chips has abrasive surfaces including a top abrasive surface and peripheral surfaces and the outer peripheral portion and the inner peripheral portion are declined to the top surface. The abrasive discs have a combination of different abrasive chips fabricated by different bonding metals for the fabrication of the abrasive chips.