tolerance zone shapes in gd&t
TRANSCRIPT
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TOLERANCE ZONE SHAPES IN GD&T
Sreelakshmy V.U
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FEATURE CONTROL FRAME
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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.
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FORM TOLERANCES
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STRAIGHTNESS
PARALLEL LINES ARE THE TOLERANCE ZONE FOR THE ABOVE TWO CONDITIONS
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FLATNESS & PARALLELISM
NO DATUM (REFERENCE) IS THERE FOR FLATNESS BUT FOR PARALLELISM DATUM (REFERENCE) IS CONSIDERED
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CIRCULARITY
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CYLINDRICITY
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ORIENTATION TOLERANCE
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ANGULARITY
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PERPENDICULARITY
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LOCATION TOLERANCE
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POSITION
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CONCENTRICITY
Tolerance zone is TWO CO-AXIAL CYLINDER. It controls the axis of two concentric circles
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SYMMETRY
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PROFILE TOLERANCE
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PROFILE OF LINE
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PROFILE OF SURFACE
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RUN OUT TOLERANCE
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CIRCULAR RUN OUT
Tolerance zone is two concentric circles
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TOTAL RUN OUT
Tolerance zone is two coaxial cylinder
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THANK YOU (Referred from concerned website)