After drying, the parts-making operations begin. The first of these operations involves bending of the piano rim (the curved side giving a grand piano its familiar shape). These rims are formed of multiple layers of specially selected maple that are manually forced into a unified shape, held in presses for several hours, and then seasoned for 10 weeks before being
joined to other wooden parts. During this time, the sounding board (a specially tapered Alaska Sitka spruce panel placed inside the rim to amplify the sound) and many other case parts are made. The final critical operation with parts making involves the fabrication of the 88 individual piano action sets that exist inside a piano. Piano “actions” are the intricate mechanical assemblies—made almost completely of wood and some felt, metal, and leather—that transmit finger pressure on the piano keys into the force that propels the hammers that strike the strings. The action is a particularly important part of a piano because this mechanical linkage gives Steinways their distinctive feel. In the action department, each operator was responsible for inspecting his or her own work, with all assembled actions further subject to 100% inspection.