Definition of Bow drill. Meaning of Bow drill. Synonyms of Bow drill

Here you will find one or more explanations in English for the word Bow drill. Also in the bottom left of the page several parts of wikipedia pages related to the word Bow drill and, of course, Bow drill synonyms and on the right images related to the word Bow drill.

Definition of Bow drill

Bow drill
Drill Drill, n. 1. An instrument with an edged or pointed end used for making holes in hard substances; strictly, a tool that cuts with its end, by revolving, as in drilling metals, or by a succession of blows, as in drilling stone; also, a drill press. 2. (Mil.) The act or exercise of training soldiers in the military art, as in the manual of arms, in the execution of evolutions, and the like; hence, diligent and strict instruction and exercise in the rudiments and methods of any business; a kind or method of military exercises; as, infantry drill; battalion drill; artillery drill. 3. Any exercise, physical or mental, enforced with regularity and by constant repetition; as, a severe drill in Latin grammar. 4. (Zo["o]l.) A marine gastropod, of several species, which kills oysters and other bivalves by drilling holes through the shell. The most destructive kind is Urosalpinx cinerea. Bow drill, Breast drill. See under Bow, Breast. Cotter drill, or Traverse drill, a machine tool for drilling slots. Diamond drill. See under Diamond. Drill jig. See under Jig. Drill pin, the pin in a lock which enters the hollow stem of the key. Drill sergeant (Mil.), a noncommissioned officer whose office it is to instruct soldiers as to their duties, and to train them to military exercises and evolutions. Vertical drill, a drill press.

Meaning of Bow drill from wikipedia

- A bow drill is a simple hand-operated type of tool, consisting of a rod (the spindle or drill shaft) that is set in rapid rotary motion by means of a...
- antlers found, are from the Upper Paleolithic era. Bow drill (strap-drill) are the first machine drills, as they convert a back and forth motion to a rotary...
- of the ancient types of hand-operated drills, including a hand drill, bow drill (or strap drill), or pump drill. The spindle is usually 1–2 cm thick and...
- Noise Unit "Drill", a 2021 song by G Herbo from the album 25 Fire drill Tornado drill Lockdown drill Bow drill, a fire-making tool Drill (agriculture)...
- floating, can "float" their hands back to the top of the drill.[original research?] Bow drill Pump drill Brace (tool) Frederick Webb Hodge (1 July 2003). Handbook...
- yo-yo or button whirligig. The process then can be repeated. Bow drill, strap drill Hand drill J. W. Powell (1884) Annual report of the Bureau of Ethnology...
- The advantage of the hand drill technique is that it requires no rope. The bow drill uses the same principle as the hand drill (friction by rotation of...
- Chalcolithic necropolis (middle of the 5th millennium BC). The bow drill was used to drill holes into carnelian in Mehrgarh in the 4th–5th millennium BC...
- rotor in 1743, and the French naturalist Christian de Launoy created a bow drill device with contra-rotating feather propellers. In 1792, George Cayley...
- oldest (and first Early Neolithic) evidence for the drilling of teeth in vivo (using bow drills and flint tips) was found in Mehrgarh. In South India...