screw motor

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• Screw (simple machine) — Look up in Wiktionary, the free dictionary. of the machine. More threading increases the mechanical advantage. A rough comparison of mechanical advantage can be done by taking the circumference of the shaft of the screw and divide by the distance …   Wikipedia

• screw — 01. We need some [screws] to put this shelf up on the wall. 02. The threads on this [screw] are gone, and it keeps coming out. 03. I had to [screw] the bolt in with my fingernail because I didn t have any tools. 04. Beer bottles these days all… …   Grammatical examples in English

• Screw press — A Screw press is a type of machine press in which the ram is driven up and down by a screw. The screw shaft can be driven by a handle, or a wheel. It works by using a coarse screw to convert the rotation of the handle or drive wheel into a small… …   Wikipedia

• Motor life boat — The Motor Life Boat (MLB) is an integral part of a coast guard fleet, built to withstand the most severe conditions at sea. Designed to be self bailing, self righting and practically unsinkable, MLBs are used for surf rescue in heavy weather.The… …   Wikipedia

• Screw gun — A screw gun is a tool used to install sheetrock, also known as drywall. Screw guns look like a normal drill although they have a nose as opposed to a chuck. The nose holds an interchangeable 1/4 inch shank bit {commonly known as a tip}. Most… …   Wikipedia

• screw propeller — noun a propeller with several angled blades that rotates to push against water or air • Syn: ↑screw • Hypernyms: ↑propeller, ↑propellor • Part Holonyms: ↑ship, ↑outboard motor, ↑outboard …   Useful english dictionary

• Piezoelectric motor — A piezoelectric motor or piezo motor is a type of electric motor based upon the change in shape of a piezoelectric material when an electric field is applied. Piezoelectric motors make use of the converse piezoelectric effect whereby the material …   Wikipedia

• List of screw drives — Contents 1 Common types 1.1 External types 1.1.1 Square 1.1.2 Hex …   Wikipedia

• Archimedes' screw — was operated by hand and could raise water efficiently …   Wikipedia

• Stepper motor — A stepper motor (or step motor) is a brushless, synchronous electric motor that can divide a full rotation into a large number of steps. The motor s position can be controlled precisely, without any feedback mechanism (see open loop control).… …   Wikipedia

• Tractor screw — Tractor Tract or, n. [NL., from L. trahere, tractum, to draw.] 1. That which draws, or is used for drawing. [1913 Webster] 2. pl. (Med.) Two small, pointed rods of metal, formerly used in the treatment called Perkinism. [1913 Webster] 3. a motor… …   The Collaborative International Dictionary of English