A Comparison of Factors Affecting Power for Abrasive and Knife Planing of Hardwoods

Basswood, yellow-poplar, red oak, and hickory were abrasive and knife-planed at 8, 14, and 20 percent moisture content. The abrasive planer machine variables were grit size, depth of cut, and feed rate, and the knife planer machine variables were depth of cut and feed rate. Power requirements were recorded for all machining situations, and regression equations were developed for estimating power requirements to abrasive and knife plane. Power in creases as feed rate, depth of cut, moisture content, and specific gravity increase for both abrasive and knife planing, and as grit number increases for abrasive planing. Belt loading is related to moisture content and individual species characteristics. Power for abrasive planing in creases relatively little as moisture content increases over the ranges of values used. Power requirements can be readily estimated for cubic inches of material removed per unit time.

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