tolerance zone shapes in gd&t
Post on 20-Mar-2017
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TOLERANCE ZONE SHAPES IN GD&T
Sreelakshmy V.U
FEATURE CONTROL FRAME
HOW TOLERANCE ZONE GOT DERIVED
Earlier the tolerance zone was SQUARE in shape. So, rejections were high during the inspection (mass production). To avoid rejections, the tolerance zone was revised to CIRCLE shape.
FORM TOLERANCES
STRAIGHTNESS
PARALLEL LINES ARE THE TOLERANCE ZONE FOR THE ABOVE TWO CONDITIONS
FLATNESS & PARALLELISM
NO DATUM (REFERENCE) IS THERE FOR FLATNESS BUT FOR PARALLELISM DATUM (REFERENCE) IS CONSIDERED
CIRCULARITY
CYLINDRICITY
ORIENTATION TOLERANCE
ANGULARITY
PERPENDICULARITY
LOCATION TOLERANCE
POSITION
CONCENTRICITY
Tolerance zone is TWO CO-AXIAL CYLINDER. It controls the axis of two concentric circles
SYMMETRY
PROFILE TOLERANCE
PROFILE OF LINE
PROFILE OF SURFACE
RUN OUT TOLERANCE
CIRCULAR RUN OUT
Tolerance zone is two concentric circles
TOTAL RUN OUT
Tolerance zone is two coaxial cylinder
THANK YOU (Referred from concerned website)
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