{"product_id":"robbjack-sr-2-040-square-end-mill-0-04-in-2-flute-carbide","title":"Robbjack SR-2-040 Square End Mill 0.04 in 2 Flute Carbide","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe ROBBJACK SR-2-040 is a miniature solid carbide square end mill from the SR-2 series, designed for precision milling of small features in metalworking, toolroom, and production machining applications. The cutting diameter measures 0.04 inches with a 0.12-inch length of cut, a 1\/8-inch straight-cylindrical shank, and a 1.5-inch overall length. Built from solid carbide in ROBBJACK's Tuffy material grade, this two-flute tool delivers the rigidity and edge retention required when holding tight dimensional tolerances on small-part work. It ships uncoated and is suited for machinists and toolmakers running CNC mills or manual equipment where fine detail cutting is the priority.\u003c\/p\u003e\u003cp\u003eThis end mill is used in precision machining environments including mold and die work, medical device manufacturing, aerospace component work, and general toolroom applications where small-diameter features such as slots, pockets, and contours must be cut accurately. The 0.04-inch diameter makes it appropriate for micro-milling operations where larger tools cannot access the geometry. Its regular-length configuration fits standard tool holders without extended-reach considerations, keeping deflection minimal at this diameter.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e0.04-inch cutting diameter with a tight mill diameter tolerance of plus 0.0005 \/ minus 0.0005 inches\u003c\/li\u003e\n\u003cli\u003eSolid carbide construction in Tuffy material grade for hardness and wear resistance\u003c\/li\u003e\n\u003cli\u003eTwo-flute, spiral-flute geometry with a 30-degree helix angle for chip evacuation in small cavities\u003c\/li\u003e\n\u003cli\u003eCentercutting design allows plunge entry directly into the workpiece\u003c\/li\u003e\n\u003cli\u003eRight-hand cut and right-hand flute orientation  -  standard configuration for conventional CNC spindle rotation\u003c\/li\u003e\n\u003cli\u003e1\/8-inch straight-cylindrical shank with a shank diameter tolerance of minus 0.0001 \/ minus 0.0002 inches for consistent tool holding\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style replacement and standard production tool in the ROBBJACK SR-2 series; fits any tool holder or collet accepting a 1\/8-inch straight-cylindrical shank.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation is performed by qualified machinists or toolroom technicians. Ensure the spindle is fully powered down and the machine is in a safe state before loading or changing any end mill. Use a calibrated collet or end mill holder sized for a 1\/8-inch shank and verify runout with a dial indicator before beginning a cut, as runout has a disproportionate effect on tool life and surface finish at this diameter. Do not exceed the 0.12-inch length of cut; engaging flute length beyond this value risks tool deflection or breakage on a tool of this size.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\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: plus 0.0005 \/ minus 0.0005 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 2\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: minus 0.0001 \/ minus 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: plus 0.040 \/ minus 0.040 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\u003eMaterial Grade\u003c\/strong\u003e: Tuffy\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHelix Angle\u003c\/strong\u003e: 30 degrees\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute Type\u003c\/strong\u003e: Spiral\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Type\u003c\/strong\u003e: Straight-Cylindrical\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\u003eCoating\u003c\/strong\u003e: Uncoated\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: SR-2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.0625 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: SR-2-040\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ROBBJACK","offers":[{"title":"Default Title","offer_id":51972212785458,"sku":"SR-2-040","price":40.02,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/ee17f1a62b14df315af2b212cd542090_5b7bcaf0-08f5-440b-a3ea-e09d5f31bbcf.jpg?v=1789964590","url":"https:\/\/voomisupply.com\/products\/robbjack-sr-2-040-square-end-mill-0-04-in-2-flute-carbide","provider":"Voomi Supply","version":"1.0","type":"link"}