The term "microcrystalline" describes a special structure found in the grit of an abrasive. Each individual ceramic abrasive grain in this structure is formed from a large number of smaller aluminium oxide particles during the manufacturing process. As the fine boundaries between the individual aluminium oxide particles remain intact inside the ceramic grain, the grain is given a so-called microcrystalline structure.
Abrasives with grains that have a microcrystalline structure possess self-sharpening properties: as soon as the point of a grain becomes dull during the grinding process, the point is shed from the grain on account of the increasing pressure. Since taking place along the microcrystalline structure, this shedding creates a new sharp-edged grain point that allows the user to keep grinding with no loss in aggressiveness.
The prerequisite for the optimal wear characteristics of an abrasive with ceramic grains is that the user exerts sufficient tool pressure while grinding.
The main field of application for microcrystalline, ceramic grains are hard-to-machine materials such as alloyed steels, stainless steels and so-called superalloys.
Klingspor carries various abrasives with ceramic grains in their product range. The flexibility and tear resistance in the backing used for these products varies with the applications for which they are used. Klingspor's range in this product category also includes vitrified abrasives with a microcrystalline structure and multibond, which are suitable for applications requiring cool grinding.
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