{"product_id":"robbjack-c1-401-02-square-end-mill-1-16-in-4-flute-carbide","title":"Robbjack C1-401-02 Square End Mill 1\/16 in 4 Flute Carbide","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe ROBBJACK C1-401-02 is a solid carbide square end mill built for precision cutting in tight-tolerance machining applications. With a 0.0625 inch (1\/16 inch) mill diameter, a 3\/16 inch length of cut, and a 1\/8 inch straight cylindrical shank, this tool is engineered for small-diameter work where rigidity and edge integrity are critical. The 4-flute configuration with a 30-degree spiral helix supports efficient chip evacuation and clean surface finishes. It runs right-hand cut and right-hand flute, uncoated, and is centercutting, allowing plunge entry as well as peripheral and slot milling. Machinists and CNC operators working in precision shops install this type of tooling in vertical and horizontal machining centers.\u003c\/p\u003e\u003cp\u003eThis end mill is suited for milling ferrous and non-ferrous materials in applications that require small-diameter tooling, including fine detail work, slotting, and profiling in molds, dies, and precision components. The C1-401 series targets regular-length tooling requirements where a compact 1-1\/2 inch overall length keeps deflection low. The C2 carbide material grade provides the hardness needed for general-purpose cutting at elevated speeds. This tool is typically specified by machinists, tool-and-die makers, and CNC programmers working on close-tolerance parts.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e0.0625 inch (1\/16 inch) mill diameter for small-feature and fine-detail cutting\u003c\/li\u003e\n\u003cli\u003eSolid carbide construction, C2 material grade, for hardness and wear resistance\u003c\/li\u003e\n\u003cli\u003e4-flute spiral design with 30-degree helix angle for efficient chip removal\u003c\/li\u003e\n\u003cli\u003eCentercutting geometry allows plunge milling in addition to peripheral cuts\u003c\/li\u003e\n\u003cli\u003eRight-hand cut and right-hand flute for standard spindle rotation\u003c\/li\u003e\n\u003cli\u003eUncoated finish, suitable for a wide range of general-purpose materials\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a standard straight-shank small-diameter square end mill for use in CNC machining centers, manual mills, and similar equipment that accept a 1\/8 inch diameter straight cylindrical shank. Part of the ROBBJACK C1-401 series for regular-length solid carbide end mills.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation is performed by qualified machinists or CNC setup technicians. Ensure the machine spindle is fully stopped and locked out before changing tooling. Use the correct collet or end mill holder sized for the 1\/8 inch shank diameter, and verify runout after installation with a dial indicator before cutting. Handle small-diameter carbide tools with care, as they are brittle and susceptible to chipping if dropped or side-loaded beyond rated parameters.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMill Diameter\u003c\/strong\u003e: 0.0625 inches (1\/16 inch)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMill Diameter Tolerance\u003c\/strong\u003e: +0.000 \/ -0.002 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 4\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: C2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength of Cut\u003c\/strong\u003e: 0.1875 inches (3\/16 inch)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 0.1250 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: 1.5000 inches (1-1\/2 inch)\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\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\u003eExtended Reach\u003c\/strong\u003e: No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChipbreaker\u003c\/strong\u003e: No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVariable Helix\u003c\/strong\u003e: No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVariable Index\u003c\/strong\u003e: No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength Type\u003c\/strong\u003e: Regular\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: C1-401\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: C1-401-02\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ROBBJACK","offers":[{"title":"Default Title","offer_id":52068125802802,"sku":"C1-401-02","price":41.84,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/0e48b6f18bfe1c1a544ccdc2e07e34cb_3e5d99de-1435-44bf-81e7-34701543cbb2.jpg?v=1790046822","url":"https:\/\/voomisupply.com\/products\/robbjack-c1-401-02-square-end-mill-1-16-in-4-flute-carbide","provider":"Voomi Supply","version":"1.0","type":"link"}