Bonded Abrasives / 217 www.nortonabrasives.com GRAIN SPECIFICATIONS CERAMIC BLENDS NQN Blends The new, proprietary, nano-crystalline ceramic grain from Saint‑Gobain offers unparalleled grinding productivity across multiple applications. The new micro-structure of the grain features a significant crystal size reduction compared to previous generation ceramic grains. The unique formulation and reduced crystal size allows the grain to micro-fracture and self-sharpen more efficiently. This keeps the wheel sharper for longer, reducing heat, wear flats, and minimising the need for dressing. NQ Blends Blends that include medium, high, very high concentrations of premium abrasive NQ. NQ has improved self-sharpening properties allowing even cooler grinding action vs. SG. NQ blends are specially suited for low to medium pressure applications. SG Blends A blend of premium abrasives that include a medium, high, very high concentration of premium abrasive SG. SG has a unique microcrystalline structure allowing self-sharpening. ALUMINIUM OXIDE TYPES 38A White fused aluminium oxide (99,8% pure). The most friable and cool cutting of the aluminium oxides. This abrasive is supplied in all types of standard range wheels ideal for use on hard and heat sensitive steels and alloys. It has traditionally been used for sharpening high-speed steel and cast alloy tools and cutters. 38A is used for cylindrical, surface and internal grinding. 32A Sharp, monocrystalline 32A aluminium oxide purple grain, the most versatile abrasive for medium- to heavy-stock removal on the market. 19A A blend of A and 38A abrasives. This abrasive gives a grinding action that can be compared to the average of its components. It is supplied in some standard tool room wheels, used for surface, cylindrical, centreless and miscellaneous grinding on less heat sensitive steels. A This is a particularly tough form of aluminium oxide suitable for grinding high tensile strength materials, specifically, off-hand grinding (bench grinding wheels) and sharpening stones. 57A Semi-pure brown fused aluminium oxide (98% pure). The higher purity of 57A makes it a good general-purpose abrasive. Its versatility enables it to be used for grinding steel parts in both soft and hard states. 86A Pink aluminium oxide is a highly refined form of alumina which makes it a little tougher than pure white, increasing the strength along the shear planes. This abrasive is available in a range of mounted points and wheels. SILICON CARBIDE TYPES 39C Green silicon carbide with highest purity. It is ideal for grinding cemented carbide cutting tools, fired ceramics and glass, where it provides advanced performance. 37C Black silicon carbide. Supplied mainly in the resin bonds of advanced wheels used for grinding grey iron, non-ferrous metals and in vitrified bonds for grinding non-metallic materials, such as rubber and stone. INNOVATION BONDED ABRASIVES
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