It is difficult to produce bottom hole in two bearings with 35 mm in diameters and 10 mm in length on the transmission shaft bracket by die casting due to its limit of die casting die structure

so the bottom hole was formed by machining operation

which resulted in the occurrence of large gas （shrinkage） hole in worked bearing. Aiming at the features of the bearing

gas （shrinkage） hole was decreased or eliminated by adopting coordinate-ingate and inlay.