The utility model provides an empty axle construction of antifriction bearing ball mill combination wherein, relates to a mechanical structure, the especially structure of an antifriction bearing ballmill combination formula quill shaft, and the base bearing is installed on the quill shaft, the quill shaft comprises with the axle sleeve axle in the frustum shape, can effectively prevent ball milltrunnion's wearing and tearing itself, the fit -up gap of effective control ball mill base bearing, the life of extension ball mill base bearing, more convenience of the dismouting of messenger's base bearing, swiftly.