Spur Gear: 40 Teeth, 1/4" Bore Dia MPN:3240BI

A countersink cutter is engineered specifically for machinists operating across industries like automotive repair or general fabrication requiring recessed mounting holes for assemblies. It features a 12.4 mm head diameter allowing precision cutting capabilities alongside an angled cutting edge designed to produce clean, well-formed edges when creating pilot or broken threads on wood, aluminum, steel or plastics. The 90-degree angle eliminates wobbling or burr formation typical with hand drilling while preventing materials from spinning when using torque-sensitive drills. It offers convenience in reaching difficult to access tight spaces, reducing the need for secondary grinding processes that eat away precious time during production work - resulting in an efficient overall solution perfect for expert craftsmen tackling high-volume assembly jobs needing consistency of thread finish each time.