Question:

In an assembly comprising shaft and hole, the nominal sizes with tolerances are specified as

Hole: \(25.000^{+0.002}_{-0.001}\) mm,
Shaft: \(25.000^{+0.001}_{-0.003}\) mm.

The type of fit is

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A transition fit occurs when both clearance and interference are possible depending on tolerance extremes.
Updated On: Jan 13, 2026
  • Clearance fit
  • Interference fit
  • Transition fit
  • Running fit
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The Correct Option is C

Solution and Explanation

To determine the fit type, we compare the extreme limits of hole and shaft sizes. Hole limits: \[ H_{\min} = 25.000 - 0.001 = 24.999, H_{\max} = 25.000 + 0.002 = 25.002. \] Shaft limits: \[ S_{\min} = 25.000 - 0.003 = 24.997, S_{\max} = 25.000 + 0.001 = 25.001. \] Check possibility of clearance: Maximum shaft < minimum hole? \[ 25.001 < 24.999 \text{(False)} \] Check possibility of interference: Minimum shaft > maximum hole? \[ 24.997 > 25.002 \text{(False)} \] Since both clearance and interference are possible depending on tolerance combinations, the fit is a transition fit.
Final Answer: Transition fit
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