这些主轴头用于发动机车床、工具室车床、转塔车床和自动车床，并且可以在其他机器上使用，因为卡盘或夹具必须准确、牢固地安装在旋转主轴上。表中给出了每种尺寸和类型的机头，以及卡盘、面板和夹具的配合背面的完整尺寸。还提供了用于检查这些主轴头、卡盘、面板和夹具背面重要尺寸的量规尺寸，以确保不同制造商制造的零件之间的互换性。

THese spindle noses are for use on engine lathes, tool room lathes, turret lathes, and automatic lathes, and may be used advantageously on other machines wherever chucks or fixtures must be mounted accurately and rigidly on revolving spindles.Complete dimensions for each size and type of nose, as well as for mating backs of chucks, face plates, and fixtures, are given in the tables. Also given are dimensions of gages for checking the important dimensions on these spindle noses and the backs of chucks, face plates and fixtures, to insure interchangeability between parts made by different manufacturers.