SP18050 | Pilot Pin 8mm To Suit 50mm Long TCT Cutters A pilot pin serves three main purposes:. • Ejects the slug at the end of the cut. • Provides coolant feed into the centre of the cutter. • Locates the centre of the cut Specifications • Diameter: 8mm • Annular Cutter Depth of Cut: 50mm • Overall Length: 108mm