First,consider the processing order of the parts.Determining the processing sequence, the general should follow the following principle:
Drilling and then flush end.
First rough car, semi finished car again,the last car,and gradually improve the precision of the parts.Work with large tolerance first and small tolerance last.
Then,choose a reasonable speed ,feed and cutting depth according to the hardness of material.
Carbon steel material should in high speed, high feed and large cutting depth.
Hard alloy it shoud be setted in low speed,low feed and small cutting depth.