concentric chuck

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• Chuck (engineering) — Self centering three jaw chuck and key with one jaw removed and inverted showing the teeth that engage in the scroll plate. The scroll plate is rotated within the chuck body by the key, the scroll engages the teeth on the underside of the jaws… …   Wikipedia

• Eccentric chuck — Eccentric Ec*cen tric ([e^]k*s[e^]n tr[i^]k), a. [F. excentrique, formerly also spelled eccentrique, fr. LL. eccentros out of the center, eccentric, Gr. e kkentros; ek out of + ke ntron center. See {Ex }, and {Center}, and cf. {Excentral}.] 1.… …   The Collaborative International Dictionary of English

• Accurizing — is the process of improving the accuracy of a firearm or airgun.cite web |url=http://saami.org/Glossary/index.cfm |title=SAAMI glossary |accessdate=2007 08 30] For firearms, accuracy is defined as the ability to hit exactly what you re aiming at …   Wikipedia

• Nuclear weapon design — The first nuclear weapons, though large, cumbersome and inefficient, provided the basic design building blocks of all future weapons. Here the Gadget device is prepared for the first nuclear test: Trinity. Nuclear weapon designs are physical,… …   Wikipedia

• Lathe center — Dead center mounted in the spindle of a lathe and being used to support a workpiece being driven by a carrier setup A lathe center, often shortened to center, is a tool that has been ground to a point as to accurately position a workpiece about… …   Wikipedia

• English words first attested in Chaucer — Contents 1 Etymology 2 List 2.1 Canterbury Tales General Prologue …   Wikipedia

• Iron sight — Sight picture through iron sights of an H K MP5 submachine gun. The annular shroud around the front post sight is aligned with the rear peep sight to ensure the weapon is properly trained. Iron sights are a system of shaped alignment markers… …   Wikipedia

• United States — a republic in the N Western Hemisphere comprising 48 conterminous states, the District of Columbia, and Alaska in North America, and Hawaii in the N Pacific. 267,954,767; conterminous United States, 3,022,387 sq. mi. (7,827,982 sq. km); with… …   Universalium

• Rifling — refers to the helix shaped pattern in the barrel of a firearm, which imparts a spin to a projectile around its long axis. This spin serves to gyroscopically stabilize the projectile, improving its aerodynamic stability and accuracy.Rifling is… …   Wikipedia

• Marth (lunar crater) — Coordinates 31°06′S 29°18′W / 31.1°S 29.3°W / …   Wikipedia

• Taruntius (crater) — lunar crater data latitude=5.6 N or S=N longitude=46.5 E or W=E diameter=56 km depth=1.0 km colong=314 eponym=Lucius T. FirmanusTaruntius is a lunar crater on the northwest edge of Mare Fecunditatis. To the northwest is the lava flooded Lawrence… …   Wikipedia