{"product_id":"robbjack-st-343-16-a-corner-chamfer-end-mill-1-2-in-3-flute","title":"Robbjack ST-343-16-A Corner Chamfer End Mill 1\/2 in 3 Flute","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe ROBBJACK ST-343-16-A is a solid carbide corner chamfer end mill designed for precision material removal in demanding machining environments. Built from solid carbide with a PVD-applied AlTiN coating, this tool handles steel, stainless steel, cast iron, superalloys, and titanium without losing edge integrity under heat. The 1\/2 inch diameter, three-flute geometry runs right-hand cutting and right-hand flute direction. The 40-degree high helix angle promotes efficient chip evacuation and smooth surface finishes across both roughing and finishing passes. Centercutting capability allows plunge entry, adding operational flexibility on the floor.\u003c\/p\u003e\n\u003cp\u003eThe ST-343-16-A is suited for slotting, side milling, helical interpolation, and ramping operations on CNC machining centers. Its 1 inch length of cut and 3 inch overall length make it a regular-reach tool appropriate for moderate-depth features in ferrous and exotic alloy workpieces. The straight-cylindrical shank seats cleanly in standard ER collet chucks or end mill holders. This tool is typically installed and operated by machinists and CNC programmers working in job shops, aerospace, and general manufacturing environments.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eSolid carbide construction provides rigidity and wear resistance in hard and abrasive materials\u003c\/li\u003e\n  \u003cli\u003eAlTiN PVD coating extends tool life in high-temperature cutting of steel, stainless steel, superalloys, and titanium\u003c\/li\u003e\n  \u003cli\u003e45-degree chamfer angle with 0.0060 inch chamfer length generates consistent corner breaks\u003c\/li\u003e\n  \u003cli\u003e40-degree high helix angle promotes aggressive chip evacuation and reduces cutting forces\u003c\/li\u003e\n  \u003cli\u003eCentercutting design permits direct plunge entry without pre-drilling\u003c\/li\u003e\n  \u003cli\u003eSupports slotting, side milling, helical interpolation, and ramping in a single tool\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for use in CNC machining applications involving steel, stainless steel, cast iron, superalloys, and titanium. Compatible with standard 1\/2 inch straight-cylindrical end mill holders and ER collet systems.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation is performed by a qualified machinist or CNC setup technician. Secure the shank fully within the holder to the recommended gauge length and verify runout before cutting. Power down and lock out the spindle before changing or inspecting the tool. Always confirm spindle speed, feed rate, and depth of cut parameters against the material being machined before initiating a program cycle.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMill Diameter\u003c\/strong\u003e: 1\/2 inch (0.5000 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 3\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength of Cut\u003c\/strong\u003e: 1 inch (1.0000 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 3 inches (3.0000 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 1\/2 inch (0.5000 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eChamfer Angle\u003c\/strong\u003e: 45 degrees\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eChamfer Width\u003c\/strong\u003e: 0.0060 to 0.0090 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eChamfer Length\u003c\/strong\u003e: 0.0060 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHelix Angle\u003c\/strong\u003e: 40 degrees (High Helix)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEnd Mill Material\u003c\/strong\u003e: Solid Carbide\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoating\u003c\/strong\u003e: AlTiN (PVD)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlute Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCutting Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Type\u003c\/strong\u003e: Straight-Cylindrical\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSingle or Double End\u003c\/strong\u003e: Single\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCentercutting\u003c\/strong\u003e: Yes\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoolant Through\u003c\/strong\u003e: No\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePitch\u003c\/strong\u003e: Normal\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlute Type\u003c\/strong\u003e: Helical\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial Removal Type\u003c\/strong\u003e: Roughing and Finishing\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePrimary Workpiece Materials\u003c\/strong\u003e: Steel, Stainless Steel, Cast Iron, Superalloys and Titanium\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMill Diameter Tolerance\u003c\/strong\u003e: +0.0000 to -0.0030 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Diameter Tolerance\u003c\/strong\u003e: -0.0001 to -0.0002 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length Tolerance\u003c\/strong\u003e: -0.0600 to +0.0600 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: ST-343\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.1875 pounds\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eStandard Information\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: ROBBJACK\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: ST-343-16-A\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ROBBJACK","offers":[{"title":"Default Title","offer_id":51974438289714,"sku":"ST-343-16-A","price":247.74,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/6b299215f107247015dd0c5f0cad9e70_225b2bd6-27e0-476b-99c1-0b75d5446c45.jpg?v=1789977339","url":"https:\/\/voomisupply.com\/products\/robbjack-st-343-16-a-corner-chamfer-end-mill-1-2-in-3-flute","provider":"Voomi Supply","version":"1.0","type":"link"}