{"product_id":"robbjack-str-301-10-a-square-end-mill-5-16-in-3-flute-carbide","title":"Robbjack STR-301-10-A Square End Mill 5\/16 in 3 Flute Carbide","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe ROBBJACK STR-301-10-A is a solid carbide square end mill designed for precision milling in demanding machining environments. Part of the STR-301 series, this stub-length, single-end tool features a 5\/16 inch cutting diameter, a 1\/2 inch length of cut, and a 5\/16 inch shank diameter with an overall length of 2.5 inches. The three-flute, fine-pitch geometry with a 30-degree helix angle promotes efficient chip evacuation and smooth cutting action. An AlTiN coating adds heat and wear resistance, extending tool life in abrasive or high-temperature cutting conditions. Right-hand cut and right-hand flute orientation are standard.\u003c\/p\u003e\n\u003cp\u003eThis end mill is suited for slot milling, peripheral milling, and profile work in ferrous and non-ferrous materials where a stub-length tool provides added rigidity. The centercutting capability allows plunge entry, giving machinists flexibility in toolpaths without requiring a pre-drilled entry point. The compact stub-length form factor reduces deflection, making it a practical choice for short, tight-tolerance cuts on CNC machining centers and manual mills alike. It is typically selected by machinists and tool-and-die professionals working in job shop, aerospace, and general metalworking applications.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eSolid carbide construction for rigidity and extended tool life\u003c\/li\u003e\n  \u003cli\u003eAlTiN coating for heat resistance and reduced wear in high-temperature cuts\u003c\/li\u003e\n  \u003cli\u003eThree-flute, fine-pitch geometry with 30-degree helix for smooth chip flow\u003c\/li\u003e\n  \u003cli\u003eCentercutting design allows direct plunge entry\u003c\/li\u003e\n  \u003cli\u003eStub length reduces deflection and improves rigidity in tight setups\u003c\/li\u003e\n  \u003cli\u003eRight-hand cut and right-hand flute orientation\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style replacement and standard tooling option for 5\/16 inch collets and tool holders on CNC machining centers and manual milling machines requiring a stub-length square end mill with a 5\/16 inch shank.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation should be performed by a qualified machinist or toolroom technician. Ensure the machine spindle is fully stopped and locked out before changing tooling. Seat the shank fully in the collet or tool holder and torque the retention mechanism to the machine manufacturer's specification. Inspect the cutting edges for chips or coating damage before each use.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCutting Diameter\u003c\/strong\u003e: 5\/16 inch\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength of Cut (LOC)\u003c\/strong\u003e: 1\/2 inch\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 5\/16 inch\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length (OAL)\u003c\/strong\u003e: 2.5 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: 30 degrees\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePitch\u003c\/strong\u003e: Fine\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEnd Type\u003c\/strong\u003e: Square, Single End\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoating\u003c\/strong\u003e: AlTiN\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Solid Carbide\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCutting Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlute Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCentercutting\u003c\/strong\u003e: Yes\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength Type\u003c\/strong\u003e: Stub\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eExtended Reach\u003c\/strong\u003e: No\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: STR-301\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: STR-301-10-A\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ROBBJACK","offers":[{"title":"Default Title","offer_id":51958795141426,"sku":"STR-301-10-A","price":138.7,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/18cf9c516a486e770eb0dcba1ea77556.jpg?v=1789945299","url":"https:\/\/voomisupply.com\/products\/robbjack-str-301-10-a-square-end-mill-5-16-in-3-flute-carbide","provider":"Voomi Supply","version":"1.0","type":"link"}