How is LMC defined for a shaft feature?

Master the Task Group 142 Tolerances Test with comprehensive quizzes and insights, including question explanations and essential tips. Prepare for success!

Multiple Choice

How is LMC defined for a shaft feature?

Explanation:
Least Material Condition means you have the smallest amount of material left in the feature. For a shaft, which is an external feature, that happens at the smallest allowable diameter within the tolerance. So LMC is the minimum diameter permitted within the tolerance. For example, if the shaft is specified with a nominal diameter and a tolerance that allows the diameter to be as small as 19.90 mm, then 19.90 mm is the LMC. (MMC, in contrast, would be the largest diameter within the tolerance.)

Least Material Condition means you have the smallest amount of material left in the feature. For a shaft, which is an external feature, that happens at the smallest allowable diameter within the tolerance. So LMC is the minimum diameter permitted within the tolerance. For example, if the shaft is specified with a nominal diameter and a tolerance that allows the diameter to be as small as 19.90 mm, then 19.90 mm is the LMC. (MMC, in contrast, would be the largest diameter within the tolerance.)

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