The effect of blunting of the sanding belt on sanded surface roughness

The main objective of this investigation was to determine the effect of the blunting of sanding belts (grit sizes 100 and 120) on sanded surface roughness before and after moisturising. The roughness measurement was performed using the profilograph- profilometer Rank Taylor Hobson (Talysurf 10). Beech veneered specimens were sanded with a new belt (blunting 0% ), with a worn belt ( blunting 100%) and with a rather worn-out belt (blunting 110% ). Before moisturing the roughness of the samples sanded with the new sanding belt was greater than the roughness of the samples sanded with the worn belt. The increase in roughness after moisturing is more pronounced on the samples, sanded with the worn sanding belt than on the samples sanded with the new sanding belt, but that has no influence on the surface quality if the service life of the sanding belt has not expired.