Patent ID: 8894731

Claim:
An abrasive tool comprising: a plurality of abrasive grains having an average particle size of 2 microns or less; a metal bond including a nickel, tin and bronze system: and porosity including intrinsic pores, closed pores and interconnected pores; wherein the abrasive tool comprises a content of abrasive grains in the range of 0.25 to 40 vol% for the total content of the abrasive tool, a content of metal bond in the range of 10 to 60 vol% for the total volume of the abrasive tool, and a content of porosity in the range of 40 to 90 vol% for the total volume of the abrasive tool; and wherein the content of porosity comprises a content of intrinsic pores in the range of 0.01 to 20 vol% for the total volume of the porosity, a content of closed pores in the range of 0.01 to 49.99vol% for the total volume of the porosity and a content of interconnected pores in the range of 50 to 80 vol% for the total volume of the porosity.