Wood species, sanding direction and efficiency of a sanding belt

The article deals with the efficiency of the sanding belt for the chosen wood species − beech, alder, oak and pine – for various directions of sanding relative to the wood grain – 0o , 60o , and 90o . The efficiency of a sanding belt in our experiments is indicated by the amount of material removed from a solid surface per unit of time, which depending on time presents wear of the sanding belt. Wear of the sanding belt was observed by means of decrease of stock removal weight [g . cm -2 . min-1] depending on sanding belt running time which was stated for 480 minutes. Results were plotted in the graph presenting the curves of wear of the sanding belt for beech, alder, oak and pine when sanding along the grain of 0o , perpendicular to the grain of 90o and at the angle of 60o to the grain. Obtained curves were evaluated from the viewpoint of maximum and minimal removals, time of sanding for a concrete wood species, and direction of sanding. The shortest sanding time were obtained when sanding along the grain for alder – 80 minutes, for sanding direction of 60o for pine - 160 minutes and when sanding perpendicular to grain for alder - 140 minutes. The time interval of 480 minutes when sanding along the grain was obtained when sanding oak, at the sanding direction of 60o to grain when sanding beech and oak, and when sanding perpendicular to grain for pine. On the basis of the obtained results we can state a value of removal and above all sanding time of a sanding belt are different for particular wood species and directions of sanding.