Uploaded September 2018 | Updated September 2026, 8 hours ago

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A look at the inside operation of a prototype fuigo (鞴) box bellows...two intake valves, two manifold valves, one piston, one output, double action...more about fuigo here: islandblacksmith.ca/2015/06/why-you-need-a-swordsmiths-fuigo-box-bellows
valves: islandblacksmith.ca/2015/11/making-valves-for-fuigo-box-bellows
fuigo archive: islandblacksmith.ca/tag/fuigo