{"product_id":"robbjack-c1-301-12-square-end-mill-3-8-in-3-flute-carbide","title":"Robbjack C1-301-12 Square End Mill 3\/8 in 3 Flute Carbide","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe ROBBJACK C1-301-12 is a solid carbide square end mill designed for precision milling in metalworking and machining applications. With a 3\/8-inch cutting diameter, 7\/8-inch length of cut, and a 3-flute spiral flute geometry, it delivers efficient chip evacuation and smooth cutting action in a compact, rigid package. The straight cylindrical shank measures 3\/8 inch in diameter and seats securely in standard collet chucks. At 2-1\/2 inches overall length, this is a regular-length tool suited to a wide range of milling setups. Right-hand cut and right-hand flute orientation are standard. The uncoated C2-grade carbide substrate provides a sharp, consistent edge for general-purpose applications.\u003c\/p\u003e\u003cp\u003eThis end mill is intended for use in CNC machining centers and manual knee mills where precision slotting, profiling, and peripheral milling are required. Its centercutting geometry allows for plunge entry directly into the workpiece, adding operational flexibility. Typical users include machinists, toolmakers, and job shop operators working with ferrous and non-ferrous materials. The 3-flute configuration balances metal removal rate with flute space for chip clearance, making it effective in both light finishing and moderate roughing passes.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eSolid carbide C2-grade construction for rigidity and wear resistance\u003c\/li\u003e\n\u003cli\u003e3 spiral flutes with right-hand cut and right-hand flute direction\u003c\/li\u003e\n\u003cli\u003eCentercutting design allows direct plunge entry into material\u003c\/li\u003e\n\u003cli\u003e30-degree helix angle promotes smooth chip flow and stable cutting forces\u003c\/li\u003e\n\u003cli\u003eUncoated finish provides a sharp edge geometry suitable for general-purpose milling\u003c\/li\u003e\n\u003cli\u003eStraight cylindrical shank compatible with standard collet and end mill holders\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style solid carbide square end mill in the ROBBJACK Series C1-301, suitable for standard 3\/8-inch collet chucks and end mill holders on CNC machining centers and manual milling machines.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation should be performed by a qualified machinist following shop safety protocols. Power down and lock out the spindle before inserting or removing the tool. Seat the shank fully into the collet or holder to the recommended minimum engagement depth before tightening. Inspect the cutting edges and shank for damage before each use; do not run a chipped or damaged end mill.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMill Diameter\u003c\/strong\u003e: 3\/8 inch (0.3750 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength of Cut\u003c\/strong\u003e: 7\/8 inch (0.8750 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 3\/8 inch (0.3750 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 2-1\/2 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 3\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\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\u003eLength Type\u003c\/strong\u003e: Regular\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMill Diameter Tolerance\u003c\/strong\u003e: +0.000 \/ -0.003 inches\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 Tolerance\u003c\/strong\u003e: +0.060 \/ -0.060 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.125 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: C1-301\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: C1-301-12\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ROBBJACK","offers":[{"title":"Default Title","offer_id":52117654896946,"sku":"C1-301-12","price":115.12,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/b2e85e60853de727963842def7677479_6ef51560-1fb9-480b-85b3-65a11bb961ac.jpg?v=1790081690","url":"https:\/\/voomisupply.com\/products\/robbjack-c1-301-12-square-end-mill-3-8-in-3-flute-carbide","provider":"Voomi Supply","version":"1.0","type":"link"}