What Is A List Of Symbols On A Drawing Called?

What are GD&T symbols?

In geometric dimensioning and tolerancing (GD&T), a unique set of GD&T symbols are used to define the relationships between part features and measurement references..

What are the 3 types of tolerances?

Three basic tolerances that occur most often on working drawings are: limit dimensions, unilateral, and bilateral tolerances. Three basic tolerances that occur most often on working drawings are: limit dimensions, unilateral, and bilateral tolerances.

How many GD&T symbols are there?

fourteen GD&TGD&T Symbols There are a total of fourteen GD&T characteristics, and the symbols that represent them are shown in the symbol “cheat sheet” below. These symbols are placed in the first compartment of a feature control frame and define the type of tolerance that is to be applied to the feature.

What does P mean in GD&T?

projected tolerance zone“P” stands for “projected tolerance zone.” This symbol indicates the tolerance applied to the protrusion of a feature.

What are the 2 types of drawing?

Different Kinds of DrawingIllustration Drawing. These are drawings that are created to represent the lay-out of a particular document. … Life Drawing. Drawings that result from direct or real observations are life drawings. … Emotive Drawing. … Analytic Drawing. … Perspective Drawing. … Diagrammatic Drawing. … Geometric Drawing.

What are the 4 basic components of an engineering drawing?

The main purpose of engineering drawings is to communicate to other engineers, machinists, etc….Dimensions have four basic components:Dimension Text.Dimension Line andArrows.Extension Lines.Gap.

What is Ø in engineering?

In engineering drawings that symbol is used to denote diameter of circles in whatever the length unit of the drawing is (typically inches or mm) Form Wikipedia: Diameter symbol[edit ] http://en.wikipedia.org/wiki/File:Technical_Drawing_Hole_01.png. Sign ⌀ in a technical drawing.

What is a pound sign called?

The symbol # is known as the number sign, hash, or (in North American usage) pound sign. The symbol has historically been used for a wide range of purposes, including the designation of an ordinal number and as a ligatured abbreviation for pounds avoirdupois – having been derived from the now-rare ℔.

What is this symbol name?

Symbol< >Angle brackets’Apostrophe (heittomerkki)*Asterisk\Backslash15 more rows

What are the common symbols for dimension?

Primary DimensionSymbolBG unitlengthL (sometimes l)ft (foot)timet (sometimes T)s (second)temperatureT (sometimes q )oR (degree Rankine)electric currentI (sometimes i)A (ampere)3 more rows

What does STK mean on a drawing?

applicable toleranceIf not, then stock thicknesses dimensioned on face of drawing need to carry the word STOCK, or STK to cover the applicable tolerance.

What is a () called?

are all called brackets. They indicate that the terms within any of them are considered as one quantity. () are called round brackets or parentheses, {} called curly brackets or braces and [] are the square brackets. … We use these brackets when we want to enclose part of an expression already within brackets.

What are the <> symbols called?

Underscore: (sign/symbol) The ‘ _ ‘ sign/symbol is sometimes called an ‘understrike’ or ‘underdash’. But neither of these names are commonly used.

What are drawing symbols?

Symbols are the shorthand of drawing. They graphically portray the characteristics of a component with a minimal amount of drawing.

What are the symbols used in engineering drawing?

Engineering drawing abbreviations and symbolsAbbreviation or symbolDefinitionLDDlimited dimension drawingLHleft-handLM or L/Mlist of materialsLMCleast material condition144 more rows