Patent ID: 8845400
Filing Date: 2014-09-30
Classification: B24D

Abstract:
1. A rotary grinding tool with reduced noise level, comprising a metal disk having a grinding surface on at least a part of a surface of the metal disk, the grinding surface having hard grains having a Mohs hardness in excess of 9 brazed thereon at a surface density of at least 20 grains/cm a holder for supporting the metal disk, the holder having securing means for securing the holder on a rotary shaft of a rotary drive unit, the metal disk being joined to the holder, wherein the surface of the metal disk has a front surface, a sloped surface, a side surface, and a rear surface, the front surface, the sloped surface, and the side surface being continuously formed in this order from a center side to a peripheral side of the metal disk, the rear surface, being located at the back of the front surface and the sloped surface and adjacent to the side surface, the front surface being perpendicular to a rotary axis, and the side surface being parallel to the rotary axis.