"partial" roughness value on surface

[Serjo]

hi to everyone, I have always visited the forum as a viewer, but now I have a doubt for which I cannot find answer.

I am drawing a piece, on a diameter I need to indicate a roughness of 0.8 for the first 18mm worked, while for the remaining part increases the advancement and roughness is 1.6.

according to you, what is the correct line type to indicate the demarcation between the two areas with different finish, since the diameter remains unchanged?

 

[Marco F inox]

If there was a difference in diameter, the marked line would be necessary, in this case, in my opinion, it is necessary the fine continuous line, provided on the two surfaces, it is clearly indicated the roughness.
It's like the thin line that divides the thread from the rest of the non-throat diameter of a screw.

 

[Focus]

hi, I use the line "big list", as indicated in the image (j).

 

[ceschi1959]

I used, for a client very attentive to these things, what he suggested @marco f inoxI would not use what is suggested instead @ focus because you cannot indicate the two roughnesses or the lengths associated with them.

 

[Serjo]

hi, I use the line "big list", as indicated in the image (j).

View attachment 69755

I used, for a client very attentive to these things, what he suggested @marco f inoxI would not use what is suggested instead @ focus because you cannot indicate the two roughnesses or the lengths associated with them.

I also thought of the big mix, since it is used to indicate surfaces/zones with special treatments.
In this case, however, the line would go orthogonal to the axis (I attach an image), or did you mean something else?

 

[Focus]

I used, for a client very attentive to these things, what he suggested @marco f inoxI would not use what is suggested instead @ focus because you cannot indicate the two roughnesses or the lengths associated with them.

the additional line must be of the precise length to indicate the "different" area, at that point you can quote it and indicate the 2 roughnesses.

 

[Focus]

I also thought of the big mix, since it is used to indicate surfaces/zones with special treatments.
In this case, however, the line would go orthogonal to the axis (I attach an image), or did you mean something else?

I meant parallel to the axis, as indicated in the attached image.

Hi.

 

[Serjo]

I meant parallel to the axis, as indicated in the attached image.

Hi.

the additional line must be of the precise length to indicate the "different" area, at that point you can quote it and indicate the 2 roughnesses.

understood, yes, actually so it is more understandable given the specific use of the big plate line.

Thank you all!

 

[Focus]

understood, yes, actually so it is more understandable given the specific use of the big plate line.

Thank you all!

for completeness, I found an example consono.