Dimensioning,fits and tolerance.pdf
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DIMENSIONING, FITS AND TOLERANCE
Transcript of 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
