surface finish

[StefanoAntonio]

Good morning to all,
I'm sorry to open this new discussion, but I'm just in writing, I tried to look for something on the topic in the forum, but I didn't find anything.

a customer sends us a design with a surface finish point that I attach.

Do any of you have any idea how to interpret it?

thanks to all

 

[numero1]

io ho trovato questo:http://www.colorificiopaulin.com/files/pdf/sch_tecnica_it_1412938733.pdf"Maximum particle size (pt 5.3)".
even if it seems to me... :

Can it be?
Hi.

 

[StefanoAntonio]

Hi.
I don't think that's exactly what I'm looking for.
I meant a superficial finish on a mechanical piece.

normally ask us for a surface finish ra or rz.

this time they ask us a surface finish as attached to the first post.

the other difficulty is how you have to interpret the numbers that are at hand.

 

[meccanicamg]

... the norm of dimensional, geometric tolerances and roughness is required. with all those minkiates marked. then what does 0 degrees +5 degrees mean? or is zero or is five.... otherwise tolerance is written differently. . . .

 

[gerod]

but do they have any idea what tolerance is? ? ?

 

[meccanicamg]

the din en iso 1302 explains the above mentioned wording:

with the variant that is not necessarily from removal of truciole but surface finish of generic origin obtained for any process.

It is necessary to go to ISO 4287 to understand how roughness measurement sampling is done, since in din en iso 1302 reference is made to Annex g2.

 

[meccanicamg]

Good morning to all,
I'm sorry to open this new discussion, but I'm just in writing, I tried to look for something on the topic in the forum, but I didn't find anything.

a customer sends us a design with a surface finish point that I attach.

Do any of you have any idea how to interpret it?

thanks to all
View attachment 40094

then that surface finish flies into nothing. on what surface does it insist?

Is everything menaced for an o-ring seat? will then be a trade-rected bar or a chrome bar. but do they have any idea that too many writings mean higher costs of supply since it becomes complex to read and get certain things?

and diameter 30 with double arrow? What is it? nothing? the norm speaks clear, that the rows must be interrupted just beyond the lax of revolution, one arrow....qua even 3.....

 

[meccanicamg]

then the diameter 30 h9 and not +/- 0.15....just look on the catalogs .... if I have to mount an o-rong 2118. boh....it is true that some catalog reports wrong things... but a little comparison with serious companies wouldn't hurt instead of using the first catalog that happens in hand...

 

[StefanoAntonio]

the din en iso 1302 explains the above mentioned wording:

with the variant that is not necessarily from removal of truciole but surface finish of generic origin obtained for any process.

It is necessary to go to ISO 4287 to understand how roughness measurement sampling is done, since in din en iso 1302 reference is made to Annex g2.

OK thanks 1000.
then I saw that within the din en iso 1302 there is also this explanation.
I try to study it better