Shaft/Hole Tolerance

Compute upper/lower deviations and limit sizes at a nominal size for a given IT grade and shaft('h')/hole('H') tolerance basis.

Inputs

i = 0.45·∛D + 0.001D (µm); IT = k(grade)·i; shaft h: es=0, ei=−IT; hole H: EI=0, ES=+IT

IT5–IT12 supported; shaft basis h (upper dev 0), hole basis H (lower dev 0).

Shaft/Hole Tolerance schematic

Fill in Nominal D, IT grade, Basis in the Inputs section (watch the unit on each field).
Click Calculate; the tool evaluates the formula shown above.
Read Tolerance IT, Upper dev., Lower dev., Max limit, Min limit in the results area.

Formula notesTolerance grade IT sets the standard tolerance; clearance = hole_max − shaft_min, interference = hole_min − shaft_max.