2" -0.003/-0.007 allowed in asme y14.5?
2" -0.003/-0.007 allowed in asme y14.5?
(OP)
I had a badly fabricated pin where on the drawing it was indicated 2" -.003/-0.007 and they machined it at 2" exactly (+/-0.0005). I've been in the code asme y14.5 1994 but it is not clear.
Code just claim we can put fit tolerance (where we have -/-) for metric fit. Other examples are just with (+/-)
On the drawing it was the stacked version but still with 2 minus signs.
Do you think it can be misleading as a quote or it is obvious for whomever should be working with drawing?
Code just claim we can put fit tolerance (where we have -/-) for metric fit. Other examples are just with (+/-)
On the drawing it was the stacked version but still with 2 minus signs.
Do you think it can be misleading as a quote or it is obvious for whomever should be working with drawing?





RE: 2" -0.003/-0.007 allowed in asme y14.5?
They also have a recommended metric tolerancing setup:
_______________
29.980
29.959 (30 f7)
____________________
30 f7 (29.980)
(29.959)
____________________
30 f7
James Spisich
Design Engineer, CSWP
RE: 2" -0.003/-0.007 allowed in asme y14.5?
James Spisich
Design Engineer, CSWP
RE: 2" -0.003/-0.007 allowed in asme y14.5?
What is Engineering anyway: FAQ1088-1484: In layman terms, what is "engineering"?
RE: 2" -0.003/-0.007 allowed in asme y14.5?
It has a figure with the above example as a recommendation when a system is introduced by an organization.
James Spisich
Design Engineer, CSWP
RE: 2" -0.003/-0.007 allowed in asme y14.5?
I've seen it before, but I don't like it for the reason you're posting.
James Spisich
Design Engineer, CSWP
RE: 2" -0.003/-0.007 allowed in asme y14.5?
For people that haven't worked in such systems though it can be confusing, they may assume the upper value should be +ive. Of course, if not sure they should ask whoever they got the drawing from and so on back to the designer/custodian, but that doesn't always happen.
What is Engineering anyway: FAQ1088-1484: In layman terms, what is "engineering"?
RE: 2" -0.003/-0.007 allowed in asme y14.5?
James Spisich
Design Engineer, CSWP
RE: 2" -0.003/-0.007 allowed in asme y14.5?
"Good to know you got shoes to wear when you find the floor." - Robert Hunter
RE: 2" -0.003/-0.007 allowed in asme y14.5?
I think I've seen it with rivet holes, the hole size is given as the nominal rivit dia. The tolerances are then +/+ these weren't to any metric shaft fit basis or whatever. They were in good old fashioned inch, based on the tolerance in the rivit spec.
What is Engineering anyway: FAQ1088-1484: In layman terms, what is "engineering"?
RE: 2" -0.003/-0.007 allowed in asme y14.5?
What is Engineering anyway: FAQ1088-1484: In layman terms, what is "engineering"?