Virtual Condition
For a shaft that fits into a hole, the shaft virtual status must travel smaller than the hole virtual condition.
For an external characteristic of size such every bit a shaft, the virtual status is equal to the size at MMC plus the size of the set tolerance zone.
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| Shaft alongside MMC applied |
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| Shaft Virtual Condition |
For an internal characteristic of size such every bit a hole, the virtual status is equal to the size at MMC minus the size of the set tolerance zone.
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| Hole alongside MMC applied |
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| Hole Virtual Condition |
Since the shaft virtual condition is smaller than the hole virtual condition, the 2 parts volition always mate.
Virtual status is extremely useful inward pattern of functional gauges. H5N1 functional guess made to virtual condition volition ensure that a component volition ever mate alongside its counterpart.
In summary, the agency to calculate virtual condition (VC) for a shaft together with hole is:
SHAFT VC = MMC Diameter + Position Tolerance Zone Diameter
HOLE VC = MMC Diameter - Position Tolerance Zone Diameter
Resultant Condition
For a internal characteristic of size, the resultant condition is the variable value together with outermost boundary.
For a external characteristic of size, the resultant condition is the variable value and innermost boundary.
The agency to calculate resultant condition (RC) for a shaft together with hole is:
SHAFT RC = AME - Total Tolerance
HOLE RC = AME + Total Tolerance
HOLE RC = AME + Total Tolerance
Whereas AME is Actual Mating Envelope &
Total Tolerance = Bonus Tolerance + Geometric Tolerance
Lets us watch a illustration written report for Virtual & Resultant condition.
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| Internal characteristic of size |
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| Calculation Table Internal characteristic of size |
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| External characteristic of size |
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| Calculation Table External characteristic of size |
Summary
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| Comparison Table for Internal Feature of size |
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| Comparison Table for External Feature of size |
Note : virtual condition together with resultant condition are applicable exclusively for specification alongside cloth condition. Therefore inward Regardless of characteristic size ( RFS ), the like substitute are inner together with outer boundary.