The ejector pin or also called as pilot pin has 3 major functions:
- Centring: The ejector pin is exactly positioned to the centre punch mark. Switch the magnet on and the machine and tool are in the drilling position.
- Oiling: By means of the automatic internal lubrication, cutting oil is supplied via the ejector pin to the bit 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.