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Limits, Fits and Tolerances
Geometrical and Mechanical Drawing · Chapter 13 · (h) Limits, fits and tolerances
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Topics 4
- Basic size, limits of size, upper and lower deviations, tolerance and allowance; zero line
- Fits: clearance, transition and interference; hole-basis and shaft-basis systems
- IS:919 / BS 4500 system: fundamental deviation letters and tolerance grades (for example H7/g6)
- Writing toleranced dimensions on drawings: limit dimensioning, plus/minus tolerances, unilateral and bilateral