Discussion
The type of fit between a mating shaft of diameter \(25.0^{+0.010}_{-0.010}\) mm and a hole of diameter \(25.015^{+0.015}_{-0.015}\) mm is __________.
Answer: B
The fit is a transition fit.
The shaft ranges from 24.990 to 25.010 mm and the hole from 25.000 to 25.030 mm.
- Largest shaft in smallest hole: 25.010 - 25.000 = 0.010 mm of interference.
- Smallest shaft in largest hole: 25.030 - 24.990 = 0.040 mm of clearance.
Because a given pair may end up with either clearance or interference, the fit is transition.
A clearance fit needs the smallest hole to be larger than the largest shaft, and an interference fit needs the largest hole to be smaller than the smallest shaft; neither holds here. 'Linear' is not a class of fit.
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