| 摘要 |
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.
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