Abstract The invention is directed to a filler composition for an organic resin bonded grinding wheel. The filler is made up of two constituents, namely, a metal, mixtures of metals or alloys thereof, and particles of a second material having a hardness greater than that of the metal particles. The filler composition together with the bonding resin form a composite bond which forms a matrix surrounding the abrasive grains (grit) holding the abrasive grains together. The filler materials are chemically inert with respect to the resin and therefore may be used with any form of resin commonly used in the abrasive art. The size of the filler particles are smaller than the abrasive grit as is conventional in practice.
Inventors
👤 John R Thompson
Bibliographic Details
Application Number—
JurisdictionUS
Data Sourcegoogle_patents
Last Synchronized2026-11-02 09:32
CPC Classifications
B; B24; B24D; B24D3/00; B24D3/34
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
85 words
AN ABRASIVE GRINDING WHEEL HAVING A RELATIVELY SOFT GRINDING GRADE COMPRISING FROM 20 TO 70% COPPER POWDER, FROM 5 TO 45% SILICON CARBIDE FILLER, FROM 10 TO 25% OF A SYNTHETIC BINDER SELECTED FROM THE GROUP CONSISTING OF A THERMOSETTING POLYMER OR LINEAR AROMATIC POLYMER RESIN AND FROM 3 TO 30% DIAMOND ABRASIVE, THE COPPER POWDER BEING IN EXCESS OF 25% BUT LESS THAN 100%, BY VOLUME, OF THE SILICON CARBIDE FILLER, SAID COPPER POWDER AND SILICON CARBIDE FILLER BEING FINER THAN THE DIAMOND ABRASIVE.
Claim 2
Dependent Claim
85 words
AN ABRASIVE GRINDING WHEEL HAVING A RELATIVELY SOFT GRINDING GRADE COMPRISING FROM 20 TO 70% COPPER POWDER, FROM 5 TO 45% SILICON CARBIDE FILLER, FROM 10 TO 25% OF A SYNTHETIC BINDER SELECTED FROM THE GROUP CONSISTING OF A THERMOSETTING POLYMER OR LINEAR AROMATIC POLYMER RESIN AND FROM 3 TO 30% DIAMOND ABRASIVE, THE COPPER POWDER BEING IN EXCESS OF 25% BUT LESS THAN 100%, BY VOLUME, OF THE SILICON CARBIDE FILLER, SAID COPPER POWDER AND SILICON CARBIDE FILLER BEING FINER THAN THE DIAMOND ABRASIVE.
Claim 3
Dependent Claim
22 words
A grinding wheel according to claim 1 in which the size of the copper and silicon carbide are 325 mesh and finer.
Claim 4
Dependent Claim
30 words
The grinding wheel of claim 1 in which the size of the diamond abrasive is 400 mesh and coarser and the size of the fillers are 325 mesh and finer.