Electric Power Tool

The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Electric Power Tool


a portable power tool that is driven by an electric motor and that is used for the machining of materials. An electric power tool usually consists of a housing and an electric motor, the rotor of which is connected to a spindle or mandrel by means of a sleeve or a reduction gear.

A long rotor shaft may sometimes also serve as a spindle. In some cases—for example, in an electric plane—the rotor of an inverted motor, in which the stator is inside the rotor, is used as a cutter shaft. Rotary motion is sometimes transmitted from an electric motor to a working member by means of a flexible shaft.

An electric power tool has handles for carrying it and for guiding it during its operation. To reduce the weight of such a tool, the housing and certain other parts are made of a light alloy. The power rating of the electric motor is usually not higher than 0.4–1.0 kilowatt.

Electric power tools are intended mainly for carrying out small jobs and are used to mechanize manual operations in the performance of fitting, installation, assembly, or finishing work. They are also employed to machine places on articles that cannot be reached by tools on stationary machines.

In metalworking, electric power tools are widely used. To mechanize metal chipping, electric chipping hammers are employed. In such a chipping hammer, the rotation of an electric motor’s shaft is converted into the reciprocating motion of a chisel or cape chisel attached to the hammer. In metal cutting, various power hacksaws and circular saws are used. In the cutting of sheet steel up to 3 mm thick, vibration-type power shears are employed. Such shears, which can cut up to 3–6 m/min, are especially convenient in cutting from a pattern. In filing, both electric filing machines and power-driven files are used.

Various types of power-driven hand drills, or electric drills, are employed to drill or ream holes. They include light-, medium-, and heavy-duty drills, which are used to make holes with diameters of up to 9, 15, and 30 mm, respectively, as well as corner drills, which are employed to produce holes in places that are hard to reach. To mechanize thread cutting, electric thread cutters or electric drills with special attachments are used. In scraping, electromechanical power scrapers and power-driven scraping heads are used.

In woodworking, the most widely used electric power tools are power saws, electric planes, electric milling cutters, electric drills, electric mortising machines, power grinders, knot trimmers, and portable parquet finishers.

Electric power tools also include electric nut wrenches, power fretsaws, power screwdrivers, electric hammers, and power compactors, as well as auxiliary equipment, such as tool-grinding machines and sharpeners. Certain types of electric power tools come equipped with various interchangeable cutting tools. (See alsoPOWER TOOL.)


The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
FEIN POWER TOOLS UK says as an inventor of the electric power tool, it is proud to have served British industrial workers for 30 years.
Power tool manufacturers are focusing on producing cordless tools by launching the cordless versions of electric power tools types.
'Market for electric power tools to grow at fastest CAGR from 2019 to 2024'
He says you should: wear shoes when using a lawn mower; don't 'help' light the BBQ with petrol; don't attack shrubbery with electric power tools without some eye protection; give the trampoline a miss after having a few beers and if you're feeling unwell now, seek medical advice before the bank holiday starts.
Lighting towers and Water pumps, industrial tools and assembly systems, Pneumatic and Electric Power Tools, Medical Equipment, Nitrogen and Oxygen Generators, skid mounted packaged solutions to diverse and specialized range of industries including Textile, Food and Beverage, Oil and Gas, Power Plants, Refineries, Pharmaceutical, Hospitals, Construction, Cement, Marine, Telecommunication, Drilling, Mining, Automobile, and other Industrial segments.
Contestants will be given a set of electric power tools provided by the sponsors and made to perform similar activities over a given time frame.
Low operational costs and ease-of-use will continue to drive electric power tools segment, which is anticipated to dominate the India power tools market till 2016 end.
These machines are currently being used to help construct Lines One and Two of the project, where they are powering a large variety of applications including road and tunnel lighting, site office electrification, electric power tools and water coolers, said Chicago Pneumatic in a statement.
Globe Tools supplies cordless and corded electric power tools to customers in North America in particular, but also in Europe.
Now that the Conwy Valley attraction has its own source of power, it has installed two car charging points and ordered in a series of rechargeable electric power tools.
There are different types of power tools such as electric power tools, engine-driven power tools, and pneumatic power tools.
Same with all his electric power tools. When we were married, I owned a small claw hammer, one slotted screwdriver, and a pair of pliers.

Full browser ?