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Bow drill being used to make a fire. Bow drills with green jasper bits were used in Mehrgarh between the 4th and 5th millennium BC to drill holes into lapis lazuli and carnelian. Similar drills were found in other parts of the Indus Valley civilization and Iran one millennium later. [6]
The ability to make fire, generally with a friction device with hardwood rubbing against softwood (as in a bow drill), was a later development. [ 13 ] Each of these stages could occur at different intensities, ranging from occasional or " opportunistic " to "habitual" to "obligate" (unable to survive without it).
A fire drill, sometimes called fire-stick, is a device to start a fire by friction between a rapidly rotating wooden rod (the spindle or shaft) and a cavity on a stationary wood piece (the hearth or fireboard).
A pump drill is a variant of the bow drill that uses a coiled rope around a cross-section of wooden stake spin the shaft by pumping up and down a cross-member. [16] [17] A fire plough (left), as opposed to a hand drill (right) The fire plough or fireplow consists of a stick cut to a dull point, and a long piece of wood with a groove cut down ...
bow drill. Main article: Bow drill. An ancient tool usually used to make fire. It was also used for primitive woodworking and dentistry. bridgewire. Main article: Bridgewire. A relatively thin resistance wire used to set off a pyrotechnic composition serving as a pyrotechnic initiator. Bryant and May. Main article: Bryant and May
It can be used for fire making or as a drill to make holes in various materials. [1] It consists of: the drill shaft, a narrow board with a hole through the center, a weight (usually a heavy disc) acting as a flywheel, and a length of cord. The weight is attached to the shaft, near the bottom end, and the hole board is slipped over the top.
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