{"product_id":"robbjack-ss-4-031-square-end-mill-1-32-in-4-flute-carbide","title":"Robbjack SS-4-031 Square End Mill 1\/32 in 4 Flute Carbide","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe ROBBJACK SS-4-031 is a square-end, solid carbide end mill designed for high-precision milling in tight-tolerance applications. With a 0.031-inch (1\/32 inch) mill diameter and a 0.0465-inch length of cut, this stub-length tool is built for small-feature work where rigidity and accuracy are critical. The 1\/8-inch straight-cylindrical shank keeps the tool concentric in collet-style toolholders. Ground from ROBBJACK Tuffy-grade carbide, the SS-4-031 delivers consistent edge integrity in ferrous and non-ferrous materials. Licensed machinists and CNC setup technicians are the primary installers and operators of this tool.\u003c\/p\u003e\n\u003cp\u003eThis end mill belongs to the ROBBJACK SS-4 series, a stub-reach, four-flute line suited for precision profiling, slotting, and pocket milling on CNC machining centers and manual mills. The 30-degree spiral flute geometry promotes efficient chip evacuation, and the centercutting design allows plunge entry. The uncoated finish and Tuffy carbide grade make it a strong choice for non-ferrous metals, plastics, and softer alloys where coating buildup is a concern. It is not configured for extended-reach or deep-cavity work given its 1.5-inch overall length and stub-length classification.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e0.031-inch mill diameter with a tight tolerance of plus or minus 0.0005 inches for precision feature work\u003c\/li\u003e\n  \u003cli\u003eTuffy-grade solid carbide construction for edge strength and wear resistance\u003c\/li\u003e\n  \u003cli\u003e4-flute, 30-degree right-hand spiral flute for efficient chip flow and surface finish\u003c\/li\u003e\n  \u003cli\u003eCentercutting design allows direct plunge milling without a pre-drilled entry hole\u003c\/li\u003e\n  \u003cli\u003e1\/8-inch straight-cylindrical shank with a shank diameter tolerance of -0.0001 to -0.0002 inches for secure collet grip\u003c\/li\u003e\n  \u003cli\u003eStub-length (1.5-inch OAL) geometry maximizes rigidity and minimizes deflection on small-diameter cuts\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 CNC machining centers and manual milling machines accepting a 1\/8-inch straight-cylindrical shank end mill in an ER or similar collet system.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation is performed by a qualified machinist or CNC operator. Ensure the spindle is fully stopped and the machine is in an e-stop or locked-out state before changing tooling. Insert the shank fully into a clean, undamaged collet to the recommended engagement depth and torque the collet nut to the toolholder manufacturer's specification. At this diameter, runout control is critical  -  inspect TIR with a test indicator before beginning a production cut.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMill Diameter\u003c\/strong\u003e: 0.031 inches (1\/32 inch)\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\u003eNumber of Flutes\u003c\/strong\u003e: 4\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength of Cut\u003c\/strong\u003e: 0.0465 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\u003eEnd Mill Material\u003c\/strong\u003e: Solid Carbide (Tuffy Grade)\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\u003eShank Type\u003c\/strong\u003e: Straight-Cylindrical\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\u003eCoating\u003c\/strong\u003e: Uncoated\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: SS-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: SS-4-031\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ROBBJACK","offers":[{"title":"Default Title","offer_id":51972011131186,"sku":"SS-4-031","price":46.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/0e39b5125b2672c324b7d0d2d829dcc8_38e2888c-73a1-4af2-a2ff-9ab612c65193.jpg?v=1789960896","url":"https:\/\/voomisupply.com\/products\/robbjack-ss-4-031-square-end-mill-1-32-in-4-flute-carbide","provider":"Voomi Supply","version":"1.0","type":"link"}