I didn't see the drawing requirements, and I didn't know what materials. However, according to the size, the tolerance required inside and outside the circular tube is relatively small, which requires finishing. However, the parts are thin in structure and high in precision, so it is estimated that there are hardness requirements for matching parts. Therefore, the heat treatment process should also be considered.

If heat treatment is needed, machining allowance must be considered. The machining means can be: rough machining-heat treatment-finish machining.