Many products have angular features for certain special functions. Although the design engineers have considered the capability of manufacturing process when they design the parts of a product, some hidden problems about the manufacturability of the angular features are still difficult to be discovered by most of the design engineers. In this paper tolerance charts are used to design the angular features for manufacturability. Using the tolerance chart for a simple tapered part, the work dimensions and tolerances at each operation stage of manufacturing are obtained. A very tight tolerance on adjacent surfaces is created because of the tapered feature. This problem will not be discovered until the tolerance chart is employed to analyze the designed tolerances and the operation sequence. Therefore, either the design of the tolerance or the process plan of the workpiece should be modified in order to fabricate the part at a small cost of manufacturing.