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How to Choose Grinding Wheels for Polishing

Superior grinding wheels are used in cutting of stainless steel, non-ferrous metal, plain steel, and refractory materials. The article offers some advice on how to choose grinding wheels for polishing.

From: iAbrasive.comDate: 2015-04-16 08:24:48Views: 546

grinding wheel

Superior grinding wheels are mainly used in cutting of stainless steel, non-ferrous metal, plain steel, and refractory materials. The manufacture of these wheels is a precise and tightly controlled process, due not only to the inherent safety risks of a spinning disc, but also the composition and uniformity required to prevent that disc from exploding due to the high stresses produced on rotation. The article offers some advice on how to choose grinding wheels for polishing.

Grain size, from 8 (coarsest) 1200 (finest), determines the physical size of the abrasive grains in the wheel. A larger grain will cut freely, allowing fast cutting but poor surface finish. Ultra-fine grain sizes are for precision finish work.

Wheel grade, from A (soft) to Z (hard), determines how tightly the bond holds the abrasive. Grade affects almost all considerations of grinding, such as wheel speed, coolant flow, maximum and minimum feed rates, and grinding depth.

Grain spacing, or structure, from 1 (densest) to 16 (least dense). Density is the ratio of bond and abrasive to air space. A less-dense wheel will cut freely, and has a large effect on surface finish. It is also able to take a deeper or wider cut with less coolant, as the chip clearance on the wheel is greater.

For different materials, the polishing material of grinding wheel is different. For instance, white fused alumina is suitable for cutting tools, while green silicon carbide is good for achieving better grinding effect.

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