A blacksmith bellows, used to intensify fire for heating metal.
A blacksmith, mumbohal, uses a bellows to heat, shape and temper metal to make implements, as a bolo, hanggap; crowbar, baliyang; digging bar, bo''a; knife, uwah; spear, pāhul; trowel, dohag. It consists of two tubes made from hollowed out roundwood. These tubes are vertically fastened to the top of a block base containing two holes over which the tubes sit. The holes come out the front of the block. Into these holes are fastened two smaller tubes to direct air onto a fire. There are two plungers, one for each large tube sitting on the block base. A plunger consists of a roundwood handle with a circular disk fastened at one end, somewhat smaller than the large tube interior. Feathers are fastened around the circumference of the disk. By pumping the plungers alternately up and down, air is forced down through the large tubes, tube base and out through the small tubes.