An engineer's scale is a ruler, a tool for measuring distances. It is commonly made of plastic and is just over twelve inches long, so that the measuring ticks at the edges do not become unusable by usage. It is used in making engineering drawings, commonly called blueprints, in scale. For example, "one-tenth size" would appear on a drawing to indicate a part larger than the paper itself. It is not to be used to measure the machined parts to see if these meet the specifications. A ruler is an instrument used in geometry and technical drawing to measure short distances and/or to rule straight lines. ...

This scale is divided into decimalized fractions of an inch, but has a cross-section like an equilateral triangle, which enables the scale to have six edges indexed for measurement. One edge is divided into tenths of an inch, and the subsequent ones are directly marked for twentieths, thirtieths, fortieths, fiftieths, and finally sixtieths of an inch. Mid-19th century tool for converting between different standards of the inch An inch is an Imperial and U.S. customary unit of length. ...

On a metric engineer's scale, common scales are 1:100, 1:200, 1:250, 1:300, 1:400, and 1:500.

The engineer's scale came into existence when machining parts required a greater precision than the usual, binary fractionalization of the inch as in the architect's scale for houses and furniture. They were used, for example, in laying out printed circuit boards with the spacing of leads from integrated circuit chips as one-tenth of an inch. In the twenty-first century, those which are commonly purchased in the US are actually made in Germany. An architects scale is a specialized ruler. ... Close-up photo of one side of a motherboard PCB, showing conductive traces, vias and solder points for through-hole components on the opposite side. ... This article is about the chemical element. ... SEM image of an integrated circuit showing defects in the aluminium layer deposition (shown in cyan). ... Chip could refer to: Computing and electronics: Microprocessor Integrated circuit Microchip, which is used interchangeably with integrated circuit. ... (20th century - 21st century - 22nd century - other centuries) Definition In calendars based on the Christian Era or Common Era, such as the Gregorian calendar, the 21st century is the current century, as of this writing, lasting from 2001-2100. ...

Image of an Engineer's Scale

See also

• Architect's scale