{"product_id":"chicago-latrobe-50746-extra-length-drill-bit-0-4062-in-hss","title":"Chicago-latrobe 50746 Extra Length Drill Bit 0.4062 in Hss","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe CHICAGO-LATROBE 50746 is an extra length, high speed steel twist drill bit designed for long-reach drilling applications in metal fabrication, maintenance, and industrial environments. Built to Series 120X specifications, it features a 0.4062-inch diameter, a 118-degree notched drill point, and a web-thinned, tapered web construction that reduces thrust and improves chip clearing. The 10-inch overall length and 7.5-inch flute length give it the reach needed to bore through deep sections, thick stacked materials, or hard-to-access locations where standard-length bits cannot perform. The oxide finish provides mild lubricity and corrosion resistance. Machinists, toolroom technicians, and maintenance mechanics are the primary users.\u003c\/p\u003e\n\u003cp\u003eThis bit is suited for drilling cast iron and steel in applications that require extended reach beyond what a jobber-length bit provides. Typical scenarios include deep-hole work in structural components, through-hole drilling in heavy plate, and production drilling where a straight-cylindrical shank must seat in a standard drill chuck or collet. The right-hand spiral flute and regular spiral type make it compatible with conventional vertical mills, drill presses, and hand-held power drills. The 0.4062-inch shank diameter matches the cutting diameter, allowing direct chucking without adapters.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eHigh speed steel construction for durability in steel and cast iron applications\u003c\/li\u003e\n  \u003cli\u003e118-degree notched point with web thinning reduces entry thrust and improves centering\u003c\/li\u003e\n  \u003cli\u003e10-inch overall length and 7.5-inch flute length for deep or long-reach drilling\u003c\/li\u003e\n  \u003cli\u003eStraight-cylindrical shank at 0.4062 inches for direct chuck mounting\u003c\/li\u003e\n  \u003cli\u003eOxide finish provides mild corrosion resistance and lubricity\u003c\/li\u003e\n  \u003cli\u003eRight-hand cutting, 2-flute spiral design for standard chip evacuation\u003c\/li\u003e\n  \u003cli\u003eDiameter tolerance held to +0.0000 to -0.0010 inches for close-tolerance work\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for use in standard drill chucks and collets accepting a 0.4062-inch straight-cylindrical shank. Primary workpiece materials are cast iron and steel. Series 120X general-purpose extra length designation.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eA licensed machinist or qualified maintenance technician should select the appropriate spindle speed based on workpiece material and cutting diameter before drilling. Ensure the workpiece is securely fixtured and the chuck or collet is fully tightened before operation. Apply cutting fluid when drilling steel to extend tool life and manage heat buildup. Inspect the cutting edges for wear or chipping before each use and replace the bit if the point is damaged to maintain dimensional accuracy.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDrill Bit Diameter\u003c\/strong\u003e: 0.4062 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 10 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlute Length\u003c\/strong\u003e: 7.5 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 0.4062 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Length\u003c\/strong\u003e: 5 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDrill Point Angle\u003c\/strong\u003e: 118 degrees\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePoint Type\u003c\/strong\u003e: Notched\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 2\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlute Type\u003c\/strong\u003e: Spiral, Regular\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCutting 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\u003eWeb Configuration\u003c\/strong\u003e: Tapered, Web-Thinned\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTool Material\u003c\/strong\u003e: High Speed Steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoating\/Finish\u003c\/strong\u003e: Oxide\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDiameter Tolerance\u003c\/strong\u003e: +0.0000 to -0.0010 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePrimary Workpiece Material\u003c\/strong\u003e: Cast Iron, Steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoolant Through\u003c\/strong\u003e: No\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: 120X\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTool Application\u003c\/strong\u003e: Long Reach Drilling\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDrill Bit Grade\u003c\/strong\u003e: General Purpose\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: CHICAGO-LATROBE\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 50746\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"CHICAGO-LATROBE","offers":[{"title":"Default Title","offer_id":51747194110258,"sku":"50746","price":57.33,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/6a9d9c629d17e1563f51ca8c920fc284_18c8a4b4-c80b-4547-a32a-566c78d1d639.jpg?v=1788877317","url":"https:\/\/voomisupply.com\/products\/chicago-latrobe-50746-extra-length-drill-bit-0-4062-in-hss","provider":"Voomi Supply","version":"1.0","type":"link"}