{"product_id":"robbjack-st-343-10-c-corner-chamfer-end-mill-5-16-in-3-flute","title":"Robbjack ST-343-10-C Corner Chamfer End Mill 5\/16 in 3 Flute","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe ROBBJACK ST-343-10-C is a solid carbide corner chamfer end mill designed for precision material removal in ferrous and high-performance alloy machining. Built on the ST-343 series platform, this single-end tool features a 5\/16 inch (0.3125 inch) cutting diameter, a 13\/16 inch (0.8125 inch) length of cut, and a 45-degree chamfer angle with a chamfer width ranging from 0.0040 to 0.0060 inches. A TiCN (PVD) coating delivers elevated surface hardness and wear resistance for demanding cutting environments. The 40-degree high helix geometry promotes efficient chip evacuation and supports both roughing and finishing operations in a single setup.\u003c\/p\u003e\n\u003cp\u003eThis end mill is suited for CNC machining centers running steel, stainless steel, cast iron, superalloys, and titanium workpieces. Typical applications include slotting, side milling, helical interpolation, and ramping operations. The centercutting geometry allows plunge entry, giving machinists flexibility in programming complex toolpaths. The straight-cylindrical shank fits standard ER and end mill holders common in production and job shop environments. It is appropriate for both prototype and production runs where edge chamfering precision and surface finish consistency are required.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e45-degree chamfer angle with 0.0040 to 0.0060 inch chamfer width for precise edge breaking\u003c\/li\u003e\n  \u003cli\u003eTiCN PVD coating for enhanced wear resistance on steel, stainless, cast iron, superalloys, and titanium\u003c\/li\u003e\n  \u003cli\u003e40-degree high helix angle promotes aggressive chip evacuation and reduced cutting forces\u003c\/li\u003e\n  \u003cli\u003eCentercutting design enables direct plunge entry without a pre-drilled pilot hole\u003c\/li\u003e\n  \u003cli\u003eRight-hand flute direction and right-hand cutting for standard CNC spindle compatibility\u003c\/li\u003e\n  \u003cli\u003eSupports roughing and finishing in a single tool  -  slotting, side milling, helical interpolation, and ramping\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eThe ST-343-10-C is designed for machining steel, stainless steel, cast iron, superalloys, and titanium. It is compatible with standard straight-cylindrical shank tool holders and is suited for CNC milling applications requiring corner chamfering, slotting, and helical interpolation in the ST-343 series application range.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation is performed by a qualified CNC machinist or tooling technician. Secure the straight-cylindrical shank in a clean, appropriately sized end mill holder or ER collet, ensuring the shank seats fully and runout is within tolerance before beginning a cut. Verify spindle direction is set to right-hand rotation before engaging the workpiece. Always confirm feed rate and depth-of-cut parameters against material-specific cutting data before running the program.\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 inch (0.3125 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength of Cut\u003c\/strong\u003e: 13\/16 inch (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 inch (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\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\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\u003eEnd Mill Material\u003c\/strong\u003e: Solid Carbide\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoating\u003c\/strong\u003e: TiCN (PVD)\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\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\u003eWeight\u003c\/strong\u003e: 0.125 pounds\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: ST-343\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-C\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ROBBJACK","offers":[{"title":"Default Title","offer_id":51965357195570,"sku":"ST-343-10-C","price":124.49,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/01edf633bbb6ca5d0c663861e2971bef_e63bf2f9-9bed-4e8a-8398-98f71e5edc95.jpg?v=1789949728","url":"https:\/\/voomisupply.com\/products\/robbjack-st-343-10-c-corner-chamfer-end-mill-5-16-in-3-flute","provider":"Voomi Supply","version":"1.0","type":"link"}