Patent ID: 8808413

Claim:
A large diameter abrasive wheel comprising: a body having an aspect ratio defined as a ratio between diameter to thickness of at least about 10:1, wherein the body includes: an abrasive portion in the form of a layer and having abrasive grains contained within a matrix material and porosity characterized by a bimodal distribution of pores including large pores having an average large pore size (P l ), small pores having an average small pore size (P s ), and a percent difference between the average large pore size (P l ) and average small pore size (P s ) of at least 25% based on the equation ((P l −P s )/P l )×100), wherein P l >P s , wherein the abrasive portion comprises between at least about 40 vol % and about 60 vol % of abrasive grains and between at least about 30 vol % and about 56 vol % of matrix material, and wherein the matrix material comprises between at least about 60 vol % and about 85 vol % of an organic material; a first glass-fiber reinforcing member in the form of a layer distinct from the abrasive portion and contained within the body, wherein the first reinforcing member and the abrasive portion are in direct contact with each other at an interface extending through a diameter of the body; a percent thermal expansion over a temperature range of 25° C. to 450° C. of not greater than about 0.7%.