Iso fits 与 tolerances — hole 与 shaft 系统

Iso 286 tolerance grades, hole 与 shaft basis fits, 与 common fit designations.

fitstolerancesiso

Overview

Engineering reference data for ISO Fits and Tolerances — Hole and Shaft System in drawing tools.

$SF = \frac{\text{drawing size}}{\text{actual size}}$

Ratio of drawing to real dimensions.

$T = \text{max} - \text{min}$

Allowable variation in dimensions.

$AR = \frac{w}{h}$

Width to height ratio.