Laydown triangular geometry for rigidity: The triangular laydown design provides strong edge support
this end mill delivers smooth cutting action
reducing runout and improving finishing accuracy
it delivers precise corner radii and consistent results across demanding materials
and maintain smooth cutting action
OSG 55° Helix Endmill Square Edge - Centre Cutting Long Length - 4mm Blacksmith Drill Laydown triangular geometry for rigidity:The OSG 55 Helix Endmill Square Edge Centre Cutting, Long Length, 4 mm diameter is a compact milling tool built for engineers, shop teams, and DIY machinists who need reliable reach in tight features. It excels at milling, profiling, and slotting, delivering precise, repeatable results in a wide range of materials and setups. With a 55 degree helix, this endmill promotes efficient chip evacuation and reduces cutting forces, helping keep heat in check