Machining Wood with Coated Abrasives

The life of an abrasive belt is governed by the abrasion resistance of the grit particles, and by the loading of the belt. The first depends on the abrasive material, the second on structure of the belt, conditions of machining, and on the wood. Loading of abrasive belts depends on temperature, which in turn depends on pressure, belt velocity, length of contact area, grit size, and, belt structure. Contact area can be reduced by using contact wheels, thus reducing heat production and glazing. Dressing worn belts with a silicon-carbide stick leads to faster abrasion and less glaze. The effect of species on belt wear is controlled by amount of wood substance removed. Rate of material removal increases with moisture content.

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