{"product_id":"robbjack-ss-2-021-square-end-mill-0-021-in-2-flute-carbide","title":"Robbjack SS-2-021 Square End Mill 0.021 in 2 Flute Carbide","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe ROBBJACK SS-2-021 is a solid carbide square end mill designed for precision milling in demanding machining environments. With a 0.021-inch cutting diameter and a 0.0315-inch length of cut, this stub-length tool is built for tight-tolerance work in confined pockets and shallow features. The 2-flute geometry with a 30-degree right-hand spiral helix promotes efficient chip evacuation while maintaining rigidity at small diameters. Centercutting capability allows plunge entry directly into the workpiece. The uncoated carbide construction suits a wide range of base materials where coating is not required or where regrinding is anticipated.\u003c\/p\u003e\u003cp\u003eThis end mill is intended for use in CNC machining centers, high-speed spindles, and precision manual mills where micro-diameter tooling is required. The 1\/8-inch shank diameter provides compatibility with standard collet systems commonly found in production and prototype shops. Its stub-length classification reduces tool deflection, making it well suited for fine-detail milling, engraving lead-in passes, and slotting operations in materials such as aluminum, brass, plastics, and soft steels. A licensed machinist or tooling technician familiar with micro-diameter end mills should handle setup and operation.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e0.021-inch cutting diameter with a mill diameter tolerance of plus 0.0005 \/ minus 0.0005 inches for tight dimensional control\u003c\/li\u003e\n\u003cli\u003eSolid carbide construction delivers rigidity and wear resistance at micro-diameter scale\u003c\/li\u003e\n\u003cli\u003e2-flute, 30-degree right-hand spiral helix promotes chip evacuation in shallow pockets\u003c\/li\u003e\n\u003cli\u003eCentercutting design allows direct plunge entry without a pre-drilled pilot hole\u003c\/li\u003e\n\u003cli\u003eStub length classification minimizes deflection during fine-detail and slotting operations\u003c\/li\u003e\n\u003cli\u003e1\/8-inch shank diameter fits standard collet systems without adapters\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style replacement or direct-specification micro end mill for CNC machining centers and precision mills equipped with standard 1\/8-inch collet toolholding systems.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation and tool changes must be performed with the spindle fully powered down and locked out per applicable shop safety procedures. Use a calibrated torque collet wrench appropriate for 1\/8-inch toolholding to secure the shank without over-tightening. At 0.021-inch diameter, this tool is highly susceptible to breakage from side loads, runout, and improper feed-rate programming  -  verify spindle runout and program conservative feed and speed parameters before full production use. Consult the tooling manufacturer feeds-and-speeds data or a machining handbook for appropriate starting parameters for the target material.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting Diameter\u003c\/strong\u003e: 0.021 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength of Cut\u003c\/strong\u003e: 0.0315 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\u003eOverall Length\u003c\/strong\u003e: 1.5 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnd Mill Material\u003c\/strong\u003e: Solid Carbide\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\u003eLength Type\u003c\/strong\u003e: Stub\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\u003eMill Diameter Tolerance\u003c\/strong\u003e: plus 0.0005 \/ minus 0.0005 inches\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 Tolerance\u003c\/strong\u003e: plus 0.040 \/ minus 0.040 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: SS-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: SS-2-021\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ROBBJACK","offers":[{"title":"Default Title","offer_id":52076404867378,"sku":"SS-2-021","price":42.49,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/9b7ff78cfffa868b92549c0817194bbb.jpg?v=1790052629","url":"https:\/\/voomisupply.com\/products\/robbjack-ss-2-021-square-end-mill-0-021-in-2-flute-carbide","provider":"Voomi Supply","version":"1.0","type":"link"}