Abrasive Disks

Abstract

The present invention relates to a grinding disk or wheel, flap disk or cut-off disk which will increase the effectiveness of each battery charge during tool use.

We claim: 
     
         1 . An abrasive grinding wheel for use on a cordless battery-operated grinder comprising abrasive grains and a bonding agent wherein the abrasive grains comprise friable white alumina grain and wherein the bonding agent is a soft bonding agent and further comprises an active filler. 
     
     
         2 . The grinding wheel of  claim 1  wherein the abrasive grains additionally comprise black silicon carbide grain. 
     
     
         3 . The abrasive grinding wheel for use on a cordless battery-operated grinder of  claim 1  wherein the active filler comprises a wax-based lubricant. 
     
     
         4 . An abrasive flap disk for use on a cordless battery-operated tool comprises a plurality of radially arranged flaps wherein each flap is coated with an abrasive grain further the flaps are arranged in a hybrid stack pattern containing at least two flaps per hybrid stack wherein the abrasive grain of a top flap of each hybrid stack contains a friction reducing coating. 
     
     
         5 . The abrasive flap disk for use on a cordless battery-operated tool of  claim 4  wherein the abrasive grain is ceramic abrasive grain. 
     
     
         6 . The abrasive flap disk for use on a cordless battery-operated tool of  claim 5  wherein the friction reducing coating is stearate. 
     
     
         7 . An abrasive cut-off disk for use in a battery-operated tool comprising abrasive grains and a bonding agent wherein the abrasive grains comprise Alumina oxide grains and the bonding agent is porous. 
     
     
         8 . The abrasive cut-off disk for use in a battery-operated tool of  claim 7  wherein the abrasive grains further comprise 10% to 100% Zirconia alumina (40Zk). 
     
     
         9 . The abrasive cut-off disk for use in a battery-operated tool of  claim 7  wherein the cut-off disk has a thickness less than 1.7 mm. 
     
     
         10 . The abrasive cut-off disk for use in a battery-operated tool of  claim 7  wherein said bonding agent is a hard material. 
     
     
         11 . The abrasive cut-off disk for use in a battery-operated tool of  claim 7  further comprising two sides pressed with rubber molds.