learn.howToCalculate
learn.whatIsHeading
Tolerance stack-up analysis determines cumulative effect of individual component tolerances on final assembly. Critical for assembly success.
Формула
Statistical method: total = √(sum of squares) — more realistic
Пошаговое руководство
- 1Linear stack: total tolerance = sum of individual tolerances (worst case)
- 2Statistical method: total = √(sum of squares) — more realistic
- 3Design tolerances to achieve assembly fit requirements
Решённые примеры
Ввод
Four parts each ±0.5mm, total stack tolerance requirement ±1.5mm
Результат
Worst case stack = 2.0mm (exceeds), statistical = 1.0mm (passes)
Statistical justified
Распространённые ошибки
- ✕Adding worst-case tolerances without justification
- ✕Ignoring correlation between tolerances
Часто задаваемые вопросы
When to use worst case vs. statistical?
Worst case for critical assemblies; statistical for high-volume production where cost matters.
How do you reduce stack tolerance?
Use fewer parts, use larger dimensions, or reduce individual component tolerances.
Готовы посчитать? Попробуйте бесплатный калькулятор Tolerance Stack
Попробуйте сами →