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Documentation/Modules/9.2 Fits & Clearances

9.2 Fits & Clearances

ISO fit system calculations

Standards catalog

Validation: indicative · Method band: formula

Open calculator

Indicative method: Indicative closed-form or numerical model

Assumptions

  • Linear elastic material behavior unless noted otherwise.
  • User is responsible for load combinations and load factors per the selected design code.

Limitations

  • Does not replace a licensed professional engineer or official code compliance review.

Engineering checks

CheckINDUSEUISO
Clearance / interferenceimplemented———

9.2 Fits & Clearances (fits)

Purpose: ISO-style hole/shaft tolerance band — clearance, interference, transition classification.

Method: Closed-form from user-entered deviation limits:

C_{min} = D_{min}^{hole} - D_{max}^{shaft}, \quad C_{max} = D_{max}^{hole} - D_{min}^{shaft} $$[^iso-286-1-referenced] **Design codes:** ISO 286-1 referenced. **UI:** Legacy layout; `useCalculatorModule`; unit profile. **Gaps:** Manual tolerance entry — no automatic ISO tolerance grade lookup by nominal size. --- [^iso-286-1-referenced]: ISO 286-1 referenced.
Maintainer note: Lookup/equation blend with stable standards-driven outputs.