which DIN/ISO std to reference for a "STD" tolerance on a drawing
which DIN/ISO std to reference for a "STD" tolerance on a drawing
(OP)
All,
We are kinda new to this DIN/ISO thing here and we have a drawing for a customer in Germany and we need to reference a tolerance we were given but which DIN/ISO tolerance do I put on the drawing? I found two so far, DIN-7168 (appears to be an older std) and DIN/ISO-2768 (appears to be newer). For now I am going to reference the 2768 std, but is there another one I should use or is this "the one"?
Thanks,
Reman
We are kinda new to this DIN/ISO thing here and we have a drawing for a customer in Germany and we need to reference a tolerance we were given but which DIN/ISO tolerance do I put on the drawing? I found two so far, DIN-7168 (appears to be an older std) and DIN/ISO-2768 (appears to be newer). For now I am going to reference the 2768 std, but is there another one I should use or is this "the one"?
Thanks,
Reman





RE: which DIN/ISO std to reference for a "STD" tolerance on a drawing
RE: which DIN/ISO std to reference for a "STD" tolerance on a drawing
ISO 2768 has some elements that are a bit different from the typical US way of doing things so make sure you, and if you use them any external machine shops etc., understand it.
A quick Google search suggests 7168 is not to be used for new designs.
What is Engineering anyway: FAQ1088-1484: In layman terms, what is "engineering"?
RE: which DIN/ISO std to reference for a "STD" tolerance on a drawing
Tolerances for linear and angular dimensions without individual tolerance indications.
ISO 2768-2
Geometrical tolerances for features without individual
tolerance indications.
http://www.ams-prototipi.it/webfiles/iso.pdf
http://www.unionpart.com/download/ISO%202768-2.pdf
Those two should be sufficient. It clearly states: "without individual tolerance indications".
RE: which DIN/ISO std to reference for a "STD" tolerance on a drawing
You should have mentioned that both parts of ISO 2768 are intended for: "[...] dimensions of parts that are produced by metal removal or parts that are formed from sheet metal" with a remark that they "[...] may be suitable for use with materials other than metal" and for "[...] features manufactured by other processes" with special examination required. This is very important detail which is unfortunately quite often forgotten.
If OP deals with parts other than falling under this requirements... well, a lot can happen. Hence my initial questions.
RE: which DIN/ISO std to reference for a "STD" tolerance on a drawing
RE: which DIN/ISO std to reference for a "STD" tolerance on a drawing
RE: which DIN/ISO std to reference for a "STD" tolerance on a drawing