Per ISO 286 (GB/T 1800), compute hole and shaft deviations and the resulting clearance or interference from the basic size and a fit code such as H7/g6.
| Item | Formula / Note | Source / Standard |
|---|---|---|
| Fit system | Clearance/transition/interference fits | GB/T 1800.1-2020 |
| Tolerance grade | IT01–IT18, IT6–IT7 precision | GB/T 1800.1-2020 |
| Hole/shaft deviation | Hole-basis H7/g6 common | GB/T 1801-2009 |
| Clearance | Xmax = ES − ei, Xmin = EI − es | Interchangeability |
| Interference | Interference fit formulas | Machinery handbook |
| Temperature correction | ΔD = αDΔT, steel α≈11×10⁻⁶ | 20 °C reference |
模具配合计算器依据 ISO 286(GB/T 1800)极限与配合制,输入基本尺寸与配合代号(如 H7/g6),自动查表计算孔轴上下偏差、极限尺寸,并判断配合类型与间隙/过盈量,适用于模具与机械零件配合设计。