Profile of Surface - U in Front of the Tolerance
Profile of Surface - U in Front of the Tolerance
(OP)
I just ran across a profile of a surface that had the following tolerance inside the feature control frame:
0.0025|U0.0025
Since this is not outlined in ASME Y14.5M-94, it must be covered with the ISO. Could someone please explain its meaning?
Thanks
0.0025|U0.0025
Since this is not outlined in ASME Y14.5M-94, it must be covered with the ISO. Could someone please explain its meaning?
Thanks
Dave D.
www.qmsi.ca





RE: Profile of Surface - U in Front of the Tolerance
http://www.tec-ease.com/tips/october-05.htm
Powerhound, GDTP T-0419
Production Manager
Inventor 2009
Mastercam X3
Smartcam 11.1
SSG, U.S. Army
Taji, Iraq OIF II
RE: Profile of Surface - U in Front of the Tolerance
0.0025|(U) 0.0025 means all unilateral + from basic
0.0025|(U) 0 means all unilateral - from basic
0.0025|(U) 0.001 means 0.001 unilateral + from basic and 0.0015 - from basic. "unequal bilateral"
A tolerance without a (U) designation is equal bilateral.
This symbology was adopted so that unequal bilateral and unilateral tolerance allocations do not need to be seperately detailed on the specification.
Paul
RE: Profile of Surface - U in Front of the Tolerance
Powerhound, GDTP T-0419
Production Manager
Inventor 2009
Mastercam X3
Smartcam 11.1
SSG, U.S. Army
Taji, Iraq OIF II
RE: Profile of Surface - U in Front of the Tolerance
I just received the ASME Y14.5-2009 online on Friday and haven't been through the changes yet.
Dave D.
www.qmsi.ca