GATE 2020 ME (ME1) – Question 53
For a basic-shaft system: hole tolerance = 0.002 mm, shaft tolerance = 0.001 mm, allowance = 0.003 mm and basic size = 50 mm. Find maximum hole size (mm), to three decimals.
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Correct answer: 50.005 to 50.005
Explanation
In the basic-shaft system, maximum shaft size equals the basic size, 50.000 mm. For the stated clearance allowance, minimum hole size is 50.000+0.003=50.003 mm. Add the hole tolerance 0.002 mm to obtain maximum hole size **50.005 mm**. Shaft tolerance sets its lower limit and does not enter the hole upper limit.