The inner bore of copper sheathing may diminish after it is pressed.The paper raises a method of simplified calculation in order to guarantee clearance fit between copper sheathing and shaft.

• 铜套压合后,其内孔将缩小,为使装配后铜套与轴仍为间隙配合,文章提出两种符合生产需要的铜套内孔收缩量的简化计算公式。