Home » Mandrel Mandrel Written by Bryan Joslin on November 2, 2023 A tool used for shaping, bending, or sizing tubular metal components. Related Articles: Engine Turning Instructions & TutorialPlumbing Custom Brake Lines on Project Pile HouseCustom Scratch Built Bed DIY for Project Pile HouseHow to Strip Automotive Paint- The Tools and ProceduresBuffing and Metal Polishing Trouble Shooting