The dimensional limits on a shaft of 25h7 are

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The dimensional limits on a shaft of 25h7 are

1. 25.000, 25.021 mm
2. 25.000, 24.979 mm
3. 25.000, 25.007 mm
4. 25.000, 24.993 mm

Correct Option: B

Shaft Basic system

D = √18 × 30 = 23.24
i = 0.45 ³√D + 0.001(D)
i = 0.45³√2324 + 0.001(23.24)
i = 0.31 microns
IT7 = 16i = 16 × 1.31= 20.96 microns.
shaft Tolerance = 25 – (20.96 × 10^–3) = 24.979mm.