overall straightness and individual straightness of axis of cylinders

[Azeemsha]

I am trying to tolerance an assembly which has three rings connected to each other. I have attached a simple drawing which shows the arrangement. My doubt is how to show in drawing that the straightness between adjacent rings is to be within 0.25mm and when considering all three rings together the straightness to be with in 0.5mm.
I am using ISO-1101 as my standard for drawing.
Request your guidance.

 

[ctopher]

I don't see an attachment.

 

[Azeemsha]

I don't see an attachment.

sorry it was missed, reattached now

 

[ewh]

nope

 

[mfgenggear]

OP
some suggestions, since the I don't know the application.
3 cylinders must be in-line
true position
roundness
or cylindrical
.25

 

[jassco]

All the rings are free in space. Therefore, there is no straightness.

Best regards,

Alex

 

[3DDave]

Just define them as a continuous feature, or whatever term ISO uses for that condition and have an overall straightness and a straightness per length where the length just happens to cover two neighboring rings.

 

[Burunduk]

Just define them as a continuous feature, or whatever term ISO uses for that condition and have an overall straightness and a straightness per length where the length just happens to cover two neighboring rings.

United Feature.

 

[mfgenggear]

Some thing like this, it would require to machine all 3 cyl at same time.
Bored. Ground or honed inline , I would have to review iso or ASME for the proper.
I would add a foot note that the 3 cyl must be inline and concentric .

 

[greenimi]

United Feature.

Burunduk,
Can you use CT (Common toleranced feature of size)?

 

[Burunduk]

Burunduk,
Can you use CT (Common toleranced feature of size)?

Yes.

 

[mfgenggear]

Just because one could GT it would confuse the machinist.
Kiss keep it simple, a simple note would suffice