Forging tool machining #Fabrication #MachinistLife #Toolmaking #HighPrecision #Turning Will it pop, or will it pop not? That feeling when the plug gage (aka end mill shank) emerges from the precision reamed hole. The fit is so tight the air has no chance of rapidity filling up the hole through the gap. Vacuum will be created. When the shank exits the hole, air will rush in. This is one of the many steps modifying the upper forging tool. What do you think about this video? Leave a comment below.