对于轴配件（如联轴器、皮带轮）孔径的合适公差（摘自BS 4500）的选择，给出了指南，以便当配件与符合BS 4506的圆柱形轴端一起使用时，提供过盈配合、紧密配合和自由配合。交叉引用:BS 4235:第1BS 4500BS 4506ISO/R 775部分

Guidance is given on the selection of suitable tolerances (extracted from BS 4500) for the bore diameters of shaft fitments (e.g. couplings, pulleys) to give interference, close and free fits when the fitments are used with cylindrical shaft ends to BS 4506.Cross References:BS 4235:Part 1BS 4500BS 4506ISO/R 775