Limits & Fits

ISO 286 hole and shaft limits, computed from the standard's formulas. Sizes 1 to 500 mm.

Fit

Nominal size (mm) Common fits Hole Shaft Output units

Results

Computed from the ISO 286-1 formula set (tolerance factor, IT grade multipliers, fundamental deviation formulas) and verified against known values like 25 H7/g6. A few printed table values can differ by one rounding step. Interference letters (p, r, s) aren't formula-clean and will come later — for press fits, work from the standard's tables. Verify critical fits against the governing standard.