Tolerance range

[Hari Mech]

Hi All,

Please guide on below query, have a look on the attached pic.

where to do you get the MAX tolerance limit for this, is it from unspecified general tolerance ?

Unspecified tolerance for the attached is ± 0.015 . What will be the max limit?

Thanks in advance.

 

[CheckerHater]

According to the standard,

"MIN or MAX is placed after a dimension where other elements of the design definitely determine the other unspecified limit. ... Single limits are used where the intent will be clear, and the unspecified limit can be zero or approach infinity and will not result in a condition detrimental to the design."

If the unspecified limit on your drawing is unclear, then modifier "MIN" is used incorrectly.

"For every expert there is an equal and opposite expert"
Arthur C. Clarke Profiles of the future

 

[chez311]

Agreed with CH. "MIN" is a single limit tolerance - general tolerances for "unspecified" or "untoleranced" dimensions do not apply as the dimension has already been specified/toleranced with "MIN".

Again just to echo that if the other end of the tolerance is not clear or limited by some other feature/constraint or variation to infinity is unacceptable then it is indeed used improperly. An example of correct usage would be a thread depth specified at "MIN" in a blind hole - the thread is specified at a minimum depth and the maximum depth is limited by the hole depth. Or in a through hole a "MIN" thread depth could vary from the minimum depth to fully threaded for the full length of the hole.

 

[Burunduk]

To add to the examples provided by chez311, another case where I have seen this applied is when either an internal sharp corner or a small internal radius (often resulting from the manufacturing process) is acceptable from design aspect (see in the attached image). In such cases, the radius can be specified R0.2 MAX, for example.

 

[Hari Mech]

ok thankyou