The Engraving Bench is a machine added by Railcraft. It is used to create Emblems. This machine requires Minecraft Joules to operate, and has a buffer of about 750 MJ. Like the Rolling Machine, this machine will lose all of its power when it is not supplied with power.
Place Steel Ingots in the left slot. The Emblem can be chosen at the top. To engrave the Emblem, click the "Engrave" button when the machine is active. More Emblems can be unlocked by using the Unlock Emblems button. In this GUI there is an Unlock Code section. These codes can be found in posts from the Railcraft Blog, CovertJaguar's YouTube videos, and on his Twitter.