dimensioning,fits and tolerance.pdf

DIMENSIONING, FITS ANDTOLERANCE

BASIC DIMENSIONING

Placement of dimensions on thehorizontal and vertical positionPlacement of dimensions on thehorizontal and vertical position

Space

Centered position

Distance Providing space between the objectand line size

Centered position is the best option

BASIC DIMENSIONING

Without space

Without space meansthe line is extension

from the circle

Without space meansthe line is extension

from the circle

Distance a

Distance b

Without space

Space

Distance a > distance bDistance a > distance b

BASIC DIMENSIONING

Without space means the linesare extension from the size of

object

Without space means the linesare extension from the size of

object

If there are multipledimension, don’t overlapping

with another dimension

If there are multipledimension, don’t overlapping

with another dimension

Correct Wrong

WithoutSpace

Don’t do this !

BASIC DIMENSIONING

Dimension must be grouped on oneside

Dimension must be grouped on oneside WrongWrong

BASIC DIMENSIONING

No space is given for lineextension

No space is given for lineextension

No space is given for lineextension

No space is given for lineextension

Correct Wrongspace !

BASIC DIMENSIONING

Correct

CorrectDimension of circle must

form an angleDimension of circle must

form an angle

False

False

For circle object,dimension can’t be equalor extend with the line

of object

For circle object,dimension can’t be equalor extend with the line

of object

Dimension of circle mustform an angle

BASIC DIMENSIONING

CorrectFalse

When create adimension, don’t

overlapping with object

When create adimension, don’t

overlapping with object

DIMENSIONING FOR ANGLE AND ARC

Dimensioning withlinear and angle

Dimensioning withlinear and angle

Dimensioning withlinear coordinate

This is the best option for high accuracy

DIMENSIONING FOR ARC

There are two ways to give dimension forarc : inside the arc or outside the arc

There are two ways to give dimension forarc : inside the arc or outside the arc

DIMENSIONING IS INSIDE OR OUTSIDE THE OBJECT

The bestThe best Not goodNot good

You can choose this option if there are noMore space in your drawing sheet

MULTIPLE DIMENSION

Multiple dimensions are used to show metric andinch dimension on the same drawing

31,318 ± 0,076

1,283 ± 0,0030

metric (mm)

1,283 ± 0,0030Inch (in)

31,39431,242

1,2361,23

metric (mm)

Inch (in)

REVIEW OF DIMENSIONING

Look at the examplefor dimensioning

Look at the examplefor dimensioning

MULTI VIEW OBJECT

Dimension must be placed on the right view

SIZE OF DIMENSIONING : PRISM

You must place thedimension on the

same position

You must place thedimension on the

same position

SIZE OF DIMENSIONING : PRISM

You must place thedimension on the

same position

SIZE OF DIMENSIONING : CYLINDER

Cylinder as axis or holes

SYMBOL Ø FOR CYLINDER DIMENSION

SYMBOL Ø FOR CYLINDER DIMENSION

GENERAL DIMENSIONING SYMBOLS

APPLICATION OF DIMENSIONING SYMBOL (CBORE)

FAO (Finish All Over)

APPLICATION OF DIMENSIONING SYMBOL (CSK)

TOLERANCE

TOLERANCE

TOLERANCE