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What is the LMC of shaft having tolerance with size ϕ 24.6 ± 0.5

What is the LMC of shaft having tolerance with size ϕ 24.6 ± 0.5 Correct Answer ϕ 24.1

Concept:

Go gauge: A go Gauge will check all the dimensions of the workpiece in what is called the maximum metal condition (indicating the presence of the greatest amount of material permitted at a prescribed surface). 

Maximum material condition:

  • For hole: lower limit
  • For shaft: upper limit

NOGO gauge: No Go Gauges shall check only one dimension of the workpiece at a time, for the minimum metal conditions (indicating the presence of the least amount of material permitted at a prescribed surface) size. 

Minimum material condition:

  • For hole: upper limit
  • For shaft: lower limit

​Calculation:

Given:

The size is given as, ϕ 24.6 ± 0.5

Therefore, The lower limit of shaft is, 24.6 - 0.5 = 24.1 

The upper limit of shaft is, 24.6 + 0.5 = 25.1

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