{"product_id":"robbjack-st-434-20-c-corner-chamfer-end-mill-5-8-in-4-flute","title":"Robbjack ST-434-20-C Corner Chamfer End Mill 5\/8 in 4 Flute","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe ROBBJACK ST-434-20-C is a solid carbide corner chamfer end mill engineered for precision edge preparation and chamfering on ferrous and exotic workpiece materials. With a 5\/8-inch cutting diameter and a 1-1\/4-inch length of cut, this 4-flute, single-end mill produces consistent 45-degree chamfers with a chamfer width of 0.0090 to 0.0110 inches. A 30-degree helix angle promotes smooth chip evacuation, and the TiCN PVD coating increases surface hardness and wear resistance for extended tool life in demanding applications. Weighing 0.25 pounds, it is suited for CNC machining centers running right-hand cutting operations.\u003c\/p\u003e\u003cp\u003eThe ST-434-20-C is intended for use on steel, stainless steel, cast iron, superalloys, and titanium  -  workpiece material codes P, M, K, and S. Its regular-length geometry and straight-cylindrical shank make it a direct fit for standard ER or end mill holders on vertical and horizontal machining centers. Typical applications include side milling and edge chamfering in both roughing and finishing operations across aerospace, toolroom, and general metalworking environments. The 3-1\/2-inch overall length provides adequate reach for most standard fixturing setups.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e45-degree chamfer angle with 0.0090-inch chamfer length for consistent edge prep\u003c\/li\u003e\n\u003cli\u003eSolid carbide construction for rigidity and heat resistance in hard materials\u003c\/li\u003e\n\u003cli\u003eTiCN PVD coating improves wear resistance on steel, stainless, and superalloy workpieces\u003c\/li\u003e\n\u003cli\u003e30-degree medium helix angle supports efficient chip flow in right-hand cutting\u003c\/li\u003e\n\u003cli\u003eStraight-cylindrical 5\/8-inch shank fits standard end mill and collet holders\u003c\/li\u003e\n\u003cli\u003eRated for both roughing and finishing material removal in a single tool\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned for use on steel, stainless steel, cast iron, superalloys, and titanium workpieces. Part of the ROBBJACK ST-434 series for corner chamfering and side milling applications.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation is performed by a machinist or CNC setup technician. Ensure the machine spindle is fully stopped and locked out before mounting or removing the tool. Seat the shank fully and evenly in the collet or end mill holder and torque the retention mechanism to the holder manufacturer specification. Verify runout at the cutting diameter before beginning a production cut.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMill Diameter\u003c\/strong\u003e: 5\/8 inches (0.6250 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 4\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength of Cut\u003c\/strong\u003e: 1-1\/4 inches (1.2500 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 3-1\/2 inches (3.5000 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 5\/8 inches (0.6250 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: 0.0090 to 0.0110 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChamfer Length\u003c\/strong\u003e: 0.0090 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHelix Angle\u003c\/strong\u003e: 30 degrees\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHelix Style\u003c\/strong\u003e: Medium\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\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\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: +0.0010 to -0.0000 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\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\u003eSingle or Double End\u003c\/strong\u003e: Single\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePitch\u003c\/strong\u003e: Normal\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength Type\u003c\/strong\u003e: Regular\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.25 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-434-20-C\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ROBBJACK","offers":[{"title":"Default Title","offer_id":52075002691890,"sku":"ST-434-20-C","price":443.87,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/22e74466124f21a5f4dfc1f72b1ee2a8_83807dca-58dc-4b80-be05-f0646e936730.jpg?v=1790051638","url":"https:\/\/voomisupply.com\/products\/robbjack-st-434-20-c-corner-chamfer-end-mill-5-8-in-4-flute","provider":"Voomi Supply","version":"1.0","type":"link"}