Guided preselection · ISO 286

ISO 286 Fit Selection Assistant

Narrow functional requirements step by step, compare two or three fit candidates at the nominal size, and verify the selected fit directly in the ISO 286 calculator.

ISO286

Step 1 / 2

Functional preselection

What must the fit do?

Sources and legal boundary

Standard calculation and practice guidance remain separate

Limit sizes come exclusively from the validated ISO 286 calculation core. Functional ranking is explicitly labelled practice guidance and does not replace drawing review or approval by a responsible engineer.

ISO 286-1 / ISO 286-2: tolerance system, preferred selection principles, and limit deviations
Schaeffler Technical Pocket Guide: publicly available practice guidance; verify for the application