{"product_id":"robbjack-st-341-12-a-corner-chamfer-end-mill-3-8-in-3-flute","title":"Robbjack ST-341-12-A Corner Chamfer End Mill 3\/8 in 3 Flute","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe ROBBJACK ST-341-12-A is a solid carbide corner chamfer end mill designed for precision chamfering, slotting, side milling, helical interpolation, and ramping operations. It features a 3\/8 inch cutting diameter, a 5\/8 inch length of cut, and three right-hand helical flutes with a 40-degree helix angle. The tool carries an AlTiN (aluminum titanium nitride) PVD coating applied via physical vapor deposition, which improves heat resistance and extends tool life in demanding cutting applications. The single-end, straight-cylindrical shank measures 3\/8 inch in diameter, and the overall length is 2.5 inches. This end mill is suited for roughing and finishing passes where a controlled chamfer edge is required at the corner of a workpiece.\u003c\/p\u003e\u003cp\u003eThe ST-341-12-A is intended for machining steel, stainless steel, cast iron, superalloys, and titanium, making it appropriate for job shops, tool rooms, and production environments running ferrous and high-temp alloy components. The stub-length geometry and high-helix flute style help maintain rigidity in tight setups. The 45-degree chamfer angle and a chamfer width range of 0.0050 to 0.0070 inches suit applications where consistent, repeatable edge breaks or lead-in chamfers are critical to part quality.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eSolid carbide construction for rigidity and wear resistance in ferrous and superalloy materials\u003c\/li\u003e\n\u003cli\u003eAlTiN PVD coating enhances thermal resistance and tool life at elevated cutting temperatures\u003c\/li\u003e\n\u003cli\u003e40-degree high-helix flute geometry supports efficient chip evacuation during slotting and side milling\u003c\/li\u003e\n\u003cli\u003e45-degree chamfer angle with 0.0050 to 0.0070 inch chamfer width for controlled edge breaking\u003c\/li\u003e\n\u003cli\u003eRight-hand cut and right-hand flute direction; centercutting is not supported\u003c\/li\u003e\n\u003cli\u003eCompatible with helical interpolation and ramping operations in addition to standard end milling\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style solid carbide corner chamfer end mill in the ROBBJACK ST-341 series. Primary workpiece materials include steel, stainless steel, cast iron, superalloys, and titanium (material codes P, M, K, S).\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation is performed by a qualified machinist or CNC setup technician. Verify that the spindle, collet, or tool holder is clean and within specified runout tolerances before seating the shank. Power down and lock out the machine before changing tooling. Do not use this tool for plunge cutting, as the centercutting feature is not present on this end mill.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMill Diameter\u003c\/strong\u003e: 3\/8 inch (0.3750 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 3\/8 inch (0.3750 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\u003eLength of Cut\u003c\/strong\u003e: 5\/8 inch (0.6250 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReach Length\u003c\/strong\u003e: 0.6250 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 3\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\u003eChamfer Angle\u003c\/strong\u003e: 45 degrees\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChamfer Width\u003c\/strong\u003e: 0.0050 to 0.0070 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChamfer Length\u003c\/strong\u003e: 0.0050 inches\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\u003eFlute Type\u003c\/strong\u003e: Helical\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength Type\u003c\/strong\u003e: Stub\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 Materials\u003c\/strong\u003e: Steel, Stainless Steel, Cast Iron, Superalloys and Titanium\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCentercutting\u003c\/strong\u003e: No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChipbreaker\u003c\/strong\u003e: No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoolant Through\u003c\/strong\u003e: No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVariable Index\u003c\/strong\u003e: No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVariable Helix\u003c\/strong\u003e: No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExtended Reach\u003c\/strong\u003e: No\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\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\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-341-12-A\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ROBBJACK","offers":[{"title":"Default Title","offer_id":52121881051442,"sku":"ST-341-12-A","price":131.16,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/96000f4e95a2935069eeb587da23e807_46311965-90af-4521-9e86-7fd0919832a4.jpg?v=1790084863","url":"https:\/\/voomisupply.com\/products\/robbjack-st-341-12-a-corner-chamfer-end-mill-3-8-in-3-flute","provider":"Voomi Supply","version":"1.0","type":"link"}