Which term describes a tolerance applied regardless of feature size?

Which term describes a tolerance applied regardless of feature size?

• A. RFS
• B. MMC
• C. LMC
• D. Projected tolerance zone

Answer: (A)

RFS means the tolerance is applied regardless of the feature’s actual size. In GD&T, when a tolerance is specified as RFS (regardless of size), the allowable variation stays the same no matter how the feature size fluctuates during manufacture. For example, a positional tolerance of 0.1 with RFS would require the feature to fall within a 0.1 tolerance zone centered on the true position, whether the hole or pin ends up larger or smaller than nominal. This differs from modifiers like MMC or LMC, where the tolerance can expand or contract with changes in size because the condition is defined relative to a virtual size (the MMC or LMC). The projected tolerance zone is a separate concept used to extend the tolerance zone in a projection depth for mating parts, not to indicate size-independence. So the term that describes a tolerance applied regardless of feature size is RFS.

RFS means the tolerance is applied regardless of the feature’s actual size. In GD&T, when a tolerance is specified as RFS (regardless of size), the allowable variation stays the same no matter how the feature size fluctuates during manufacture. For example, a positional tolerance of 0.1 with RFS would require the feature to fall within a 0.1 tolerance zone centered on the true position, whether the hole or pin ends up larger or smaller than nominal. This differs from modifiers like MMC or LMC, where the tolerance can expand or contract with changes in size because the condition is defined relative to a virtual size (the MMC or LMC). The projected tolerance zone is a separate concept used to extend the tolerance zone in a projection depth for mating parts, not to indicate size-independence. So the term that describes a tolerance applied regardless of feature size is RFS.