{"product_id":"robbjack-sr-4-040-square-end-mill-0-04-in-4-flute-carbide","title":"Robbjack SR-4-040 Square End Mill 0.04 in 4 Flute Carbide","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe ROBBJACK SR-4-040 is a solid carbide square end mill designed for precision milling in demanding machining applications. With a 0.04-inch cutting diameter and four spiral flutes, this tool delivers clean, accurate cuts in tight geometries where rigidity and edge sharpness are critical. The Tuffy material grade carbide substrate provides the hardness and wear resistance needed for production-level cutting cycles. At 1.5 inches overall length with a 0.12-inch length of cut, this mill is built for shallow-depth finishing and slotting work. It is installed and operated by machinists and CNC programmers working on precision components.\u003c\/p\u003e\n\u003cp\u003eThe SR-4-040 is suited for milling small features in ferrous and non-ferrous materials across precision manufacturing environments. Its right-hand cut and right-hand spiral flute geometry make it compatible with standard spindle rotation on vertical machining centers and CNC mills. The 1\/8-inch straight cylindrical shank fits standard collet chucks and tool holders commonly used in high-speed machining setups. Centercutting capability allows plunge entry directly into the workpiece without pre-drilling. This tool is appropriate for production shops, tool rooms, and prototype machining operations requiring consistent performance at small diameters.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eSolid carbide Tuffy-grade substrate for high wear resistance and edge retention\u003c\/li\u003e\n  \u003cli\u003e4-flute spiral geometry for improved surface finish and chip evacuation\u003c\/li\u003e\n  \u003cli\u003eCentercutting design allows direct plunge entry into the workpiece\u003c\/li\u003e\n  \u003cli\u003eRight-hand cut and right-hand flute for standard spindle compatibility\u003c\/li\u003e\n  \u003cli\u003e30-degree helix angle balances cutting forces at small diameters\u003c\/li\u003e\n  \u003cli\u003eStraight cylindrical 1\/8-inch shank fits standard collet and end mill holders\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style replacement or direct-fit tooling option for CNC machining centers and manual mills equipped with 1\/8-inch collet chucks or end mill holders accepting straight cylindrical shanks.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation should be performed by a qualified machinist or CNC setup technician. Ensure the spindle is fully stopped and the machine is in a safe, locked-out state before inserting or removing the tool from the holder. Seat the shank fully into the collet to the recommended insertion depth and torque the collet nut to the tool holder manufacturer's specification. Verify runout with a dial indicator before beginning the cut, as runout is especially critical at this diameter.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMill Diameter\u003c\/strong\u003e: 0.04 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMill Diameter Tolerance\u003c\/strong\u003e: +0.0005 \/ -0.0005 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength of Cut\u003c\/strong\u003e: 0.12 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 0.125 inches (1\/8 inch)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Diameter Tolerance\u003c\/strong\u003e: -0.0001 \/ -0.0002 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 1.5 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length Tolerance\u003c\/strong\u003e: +0.060 \/ -0.060 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 4\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlute Type\u003c\/strong\u003e: Spiral\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHelix Angle\u003c\/strong\u003e: 30 degrees\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\u003eEnd Mill Material\u003c\/strong\u003e: Solid Carbide\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial Grade\u003c\/strong\u003e: Tuffy\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Type\u003c\/strong\u003e: Straight Cylindrical\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoating\u003c\/strong\u003e: Uncoated\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: SR-4\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.0625 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: SR-4-040\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ROBBJACK","offers":[{"title":"Default Title","offer_id":51989969633586,"sku":"SR-4-040","price":47.88,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/338e2279515db76998518250c39ea3ec.jpg?v=1789988610","url":"https:\/\/voomisupply.com\/products\/robbjack-sr-4-040-square-end-mill-0-04-in-4-flute-carbide","provider":"Voomi Supply","version":"1.0","type":"link"}