dimension question...

[A.DelNegro]

Just wondering if anyone knows what he tolerance spec "e9" means next to
a dimension. I have a customer part with a diameter dimensioned 27e9.
Its metric, so the diameter is 27mm. Just not sure what the tolerance
would be.




Thanx in advance

Tony


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[RonWerner]

Tony,

It is defined in the ISO dimension standards

Regards,

Ron

[HugoHermans]

Hi Tony,

The tolerance on your nominal dimension of 27 is -40 to -92 in micron.

Regards, Hugo.

[TomU]

Small "e" should be for shaft size, not hole size. A "27 e9" shaft would have a valid range of 26.908 - 26.960. A "26 E9" hole would have a valid range of 27.040 - 27.092.

Values were pulled from this page:

[A.DelNegro]

Thanx everyone for the quick replies. I knew it was an ISO tolerance,
just didn't have the info.



Tony