The importance of ejector pin (pilot pin) for broach cutters.
The ejector pin or also called as the pilot pin has 3 major functions to use with broach cutters:
Centering: The ejector pin is exactly positioned to the center punch mark. Switch the magnet on and the machine and broach cutter are in the drilling position.
Oiling: By means of the automatic internal lubrication, cutting oil is supplied via the ejector pin to broach cutter in just the right quantity.
Ejecting: In the final stage, the ejector pin, pre-stressed by means of a spring, pushes the core out of the drill hole made by broach cutter.