218 / Bonded Abrasives www.youtube.com/NortonAbrasivesEMEA BONDED ABRASIVES PRODUCT SELECTION The number in the grinding wheel, marking designating grit size, represents the approximate number of openings per linear inch in the final screen size used to size the grain. The following rules should be followed: The grade indicates the relative holding power of the bond, which holds abrasive grains in a wheel. This is represented in the specification by letters running through the alphabet from softest to hardest. The following rules should be followed with regard to grade: USE COARSE GRIT • For soft, ductile, stringy materials such as soft steel or aluminium • For rapid stock removal • Where finish is not important • For large areas of contact USE SOFT GRADE • For hard materials such as hard tool steels and carbides • For large areas of contact • For rapid stock removal USE FINE GRIT • For hard, brittle materials such as hard tool steels, cemented carbides and glass • For fine finishes • For small areas of contact • For holding small corner radii USE HARD GRADE • For soft materials • For small or narrow areas on contact • For longer wheel life GRIT SIZE WHEEL GRADE Vitrified bonds are the most common precision grinding bond. Porosity and strength of the wheels made with this bond give high stock removal along with their rigidity helping to attain high precision. Not affected by water, acid, oils or ordinary temperature variations. THE MOST COMMON VITRIFIED BONDS ARE: New innovative bond with improved versatility for multiple applications and alloys. Used for precision grinding operations with Aluminium Oxide abrasives. VITRIUM3 REVOLUTIONARY BOND TECHNOLOGY The Vitrium3 bond platform features an exclusive chemistry that delivers an entirely new grain adhesion science, providing cool cutting, long and precise profile holding across a wide range of precision grinding applications. VS Historical entry level bond, available with both aluminium oxide and silicon carbide. VX / VXP Equivalent to VS bond, for ceramic only. VQN / VQNP These bonds are associated with Norton Quantum technology - a technology for low, medium and high force applications. BOND TYPES-VITRIFIED F G H I J K L M N O P Q R S T U CYLINDRICAL/CENTRELESS SURFACE GRINDING ID GRINDING TOOL GRINDING THREAD GRINDING NON-REINFORCED ORGANIC REINFORCED ORGANIC COMMON RANGE OF GRADES BONDED ABRASIVES
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