Patent ID: 7722691

Claim:
A bonded abrasive tool comprising: a) a blend of abrasive grains including: i) agglomerates including filamentary sol-gel alumina abrasive grain having a length-to-cross-sectional-width aspect ratio of at least about 2:1 and non-filamentary abrasive grains; and ii) agglomerated abrasive grain granules including a plurality of abrasive grains held in a three-dimensional shape by a binding material, the abrasive grains having a length-to-cross-sectional-width aspect ratio of about 1.0; b) a bond; and c) about 35 volume percent to 80 volume percent porosity wherein a total amount of non-filamentary abrasive grains present in the blend is less than or equal to 50% of the weight of the blend.