{"product_id":"robbjack-st-343-10-a-corner-chamfer-end-mill-5-16-in-3-flute","title":"Robbjack ST-343-10-A Corner Chamfer End Mill 5\/16 in 3 Flute","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe ROBBJACK ST-343-10-A is a corner chamfer end mill designed for precision chamfering, slotting, side milling, helical interpolation, and ramping operations in demanding machining environments. Built from solid carbide and coated with AlTiN via a PVD process, this tool delivers reliable performance in high-heat cutting conditions. The cutter measures 5\/16 inches in diameter with a 13\/16 inch length of cut and a 40-degree high helix angle that promotes efficient chip evacuation. With a chamfer angle of 45 degrees and a chamfer width range of 0.0040 to 0.0060 inches, the ST-343-10-A is suited for machinists requiring tight, repeatable edge preparation on hard materials.\u003c\/p\u003e\n\u003cp\u003eThis end mill is intended for use on steel, stainless steel, cast iron, superalloys, and titanium  -  material classifications P, M, K, and S. It is a single-end, centercutting tool with right-hand flute direction and right-hand cutting direction, making it compatible with standard CNC machining centers and manual mills running conventional or climb milling operations. Typical applications include production and job-shop environments where consistent chamfer geometry and tool longevity are priorities. The helical flute style and normal pitch configuration support both roughing and finishing passes in a single tool.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eSolid carbide construction with AlTiN PVD coating for heat and wear resistance in ferrous and exotic alloy cutting\u003c\/li\u003e\n  \u003cli\u003e45-degree chamfer angle with 0.0040 to 0.0060 inch chamfer width for precise edge preparation\u003c\/li\u003e\n  \u003cli\u003e40-degree high helix angle promotes efficient chip evacuation and reduces cutting forces\u003c\/li\u003e\n  \u003cli\u003eCentercutting design enables plunge entry, helical interpolation, and ramping without a pre-drilled hole\u003c\/li\u003e\n  \u003cli\u003e3-flute configuration balances material removal rate with chip clearance for versatile roughing and finishing\u003c\/li\u003e\n  \u003cli\u003eStraight-cylindrical shank fits standard ER collet chucks and end mill holders\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for use on steel, stainless steel, cast iron, superalloys, and titanium (material codes P, M, K, S). Compatible with standard straight-bore end mill holders and ER collet systems accepting a 5\/16 inch shank diameter.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation and operation should be performed by a qualified machinist familiar with CNC or manual milling equipment. Ensure the spindle is fully stopped and machine is powered down before loading or removing the tool. Secure the 5\/16 inch straight-cylindrical shank in a properly sized collet or end mill holder, torquing to the holder manufacturer's specification. Verify runout with a dial indicator before cutting, as excessive runout will accelerate wear and compromise chamfer consistency on close-tolerance work.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMill Diameter\u003c\/strong\u003e: 5\/16 inches (0.3125 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: 13\/16 inches (0.8125 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 2.5 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 5\/16 inches (0.3125 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: 0.0040 to 0.0060 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHelix Angle\u003c\/strong\u003e: 40 degrees\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHelix Style\u003c\/strong\u003e: High\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\u003eCentercutting\u003c\/strong\u003e: Yes\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSingle or Double End\u003c\/strong\u003e: Single\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 Material\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: 0.125 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-343-10-A\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ROBBJACK","offers":[{"title":"Default Title","offer_id":51972039770418,"sku":"ST-343-10-A","price":125.09,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/01edf633bbb6ca5d0c663861e2971bef_ab075759-6493-4448-9080-439bf6cf9f61.jpg?v=1789961642","url":"https:\/\/voomisupply.com\/products\/robbjack-st-343-10-a-corner-chamfer-end-mill-5-16-in-3-flute","provider":"Voomi Supply","version":"1.0","type":"link"}