Hinge
Charnière; Scharnier; Gozne [?].
Identical types: 5Keeping the Cheeks of the bellows together, but allowing them to pivot.
Either internally or externally fastened to the cheeks; Depending on their taste, manufacturers use common or so-called piano-hinges.
Garvin, Wilbert: The Irish bagpipes: their construction and maintenance [Belfast 1978, Blackstaff Press]. Foreword by Breandán Breathnach. Kells, 1988 (2), p.11.