Patent ID: 8475553

Claim:
A bonded abrasive tool comprising: a) a blend of abrasive grains including: i) agglomerates of filamentary sol-gel alumina abrasive grain having a length-to-cross-sectional-width aspect ratio of at least about 2:1 held by a binding material; and ii) agglomerated abrasive grain granules including a plurality of abrasive grains held in a three-dimensional shape by the binding material, the abrasive grains having a length-to-cross-sectional-width aspect ratio of about 1.0; b) a bond; and c) about 50 volume percent to 75 volume percent porosity; wherein a content by weight of the agglomerates of filamentary sol-gel alumina abrasive grain is less than a content by weight of the agglomerated abrasive grain granules.