The device is designed for sewing buttons using common household sewing machines. Stencil elements with pressure sensitive adhesive on their lower surfaces are releasably mounted on the stencil support areas, arrangements are provided for permitting the removal of material underlying the stencil elements. Accordingly, the load transmission between the bearing shell and the crank pin at the upstream rotation region in the combustion stroke of the engine is restricted, thereby achieving the sufficient oil film thickness on the region.