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what is different between runout and concentricity in Gd&T
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Answer Posted / sadasivam
I am aggreed with Mr.Raghunath as the theoritical aspects
on runout & concentricity its deviated from the standard.
Where as Mr.Arul has totaly misunderstands the statement
given by Mr.Ragunath.
Run out is the related feature in GD&T.
It's clasified as Radial runout,Axial Runout & Total runout.
Generally runout depends form,orentation & location errors
on the part. checking the runouts for shafts with the help
of between center and dial indicator is the traditional
method what we are following at present and non magnetic
with parallel is the another one.
Radial runout is the composite tolerancing including the
effects of cylindricity & concentricity.
Total runout is the composite tolerancing including the
effects of cylindricity, concentricity,co axiality,
straightness & paralliesm along to axis.
My concern is,
between center is the right method for shafts & what about
if its in casting parts?should we go for CMM? if so what is
the method of measurement.
Concentricity
It is also related feature of GD&T on location tolerance.
Its purly matter of two circles only.its depends on form &
location errors on the part.
My Concern is,
Is it right that 2X TIR (total indicating reading)is the
concentricity error? in between center method.
is it right that 2Xaxis shifted (X or Y axis error) is the
concentricity?
Generally i have some doubts on GD&T:
1)in circle which method is well suited like LSC,MIC,MCC..?
2)Will form contributes more error in geometries?
3)Will flatness error contributs in perpendicularity
4)Will flatness error contributs in parallelism
5)in circle will form error changes the circle center axis?
| Is This Answer Correct ? | 22 Yes | 5 No |
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