where should we use form tolerances 2

[amolpagdal]

where should we use form tolerances means if i want to give some tolerance on the part drawing where should i give form tolerance ( flatness, straightness, circularity & cylendricity)

 

[KENAT]

Wherever it is functionally required is the obvious but probably useless answer, maybe you can express your question in another way.

Also not sure it makes much difference but to what GD&T standard are you working?

Posting guidelines faq731-376

http://eng-tips.com/market.cfm?

(probably not aimed specifically at you)
What is Engineering anyway: faq1088-1484​

 

[amolpagdal]

i want to ask what is the application where should we use form tolerances on drawing means considering where it part should be fit according to that

 

[amolpagdal]

means mor clearly when should we use form tolerances

 

[ModulusCT]

Form tolerances are great for controlling the form of a part. There are controls that do double duty, so to speak. Angularity for instance controls form AND can control orientation as well (flatness specifically). Take a look at this informative graphic I found online. This has helped me a lot and I look at it every day. This might help you answer your slightly nebulous question.

http://www.gd-t.com/map-of-gdt/

I'm not a vegetarian because I dislike meat... I'm a vegetarian because I HATE plants!!

 

[Belanger]

Your answer lies in the answer to this question: Which tolerancing standard are you using? ASME Y14.5 or the ISO series (1101 et al.)?

John-Paul Belanger
Certified Sr. GD&T Professional
Geometric Learning Systems