3M™ Polyimide Hybrid Bond CBN Wheels and Tools, 1V1 6 .75 .25 2 B180 184PN V45, MMMPBBW47877 Hoses This creates a firm support This creates a firm support for the softer mesh material that removes surface contaminants without damaging the work piece This belt also features our 3M dust management technology that reduces static cling in the dust particles The 3M™ CBN Polyimide Wheel 184PN is used to generate the flute which is the helical or straight groove in the body of the cutting tools made of tool steel and high speed steel The polyimide bond system provides improved thermal stability during high temperature grinding operations when compared to phenolic resin bonds