Motion Details
The two ends are turned between centres and drilled, and the recess for the little end is formed by a pin drill. On being cut and the shaped profile formed with the file, the sinking cut by the pin drill will be cleared of super¬ fluous metal and allow the connecting rod to swing to the required angle. Mild steel bar is usually employed for
outside cylinders, as it is often very desirable to reduce the thickness of the crosshead to the minimum to provide for the swing of the bogie wheels. The procedure in making these crossheads is the same as with the cast patlern. The forked little end will require a crosshead of a design similar to that shown in Fig. 216. Here the pin moves with the connecting rod and takes a bearing in183
