{"product_id":"chicago-latrobe-55451-reduced-shank-drill-bit-51-64-in","title":"Chicago-latrobe 55451 Reduced Shank Drill Bit 51\/64 in","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe CHICAGO-LATROBE 55451 is a reduced shank twist drill bit designed for general-purpose drilling in wood, alloy steel, carbon steel, cast iron, and similar materials. Built from high speed steel with a coated finish, it accepts a standard 1\/2 inch chuck despite carrying a 51\/64 inch cutting diameter, making it compatible with common portable drill equipment. The 118-degree standard point angle suits a wide range of material types and is a familiar geometry for trade and industrial users. With a 6 inch overall length and a 3-1\/8 inch flute length, this bit handles moderate-depth holes in typical production and service applications.\u003c\/p\u003e\n\u003cp\u003eThe 55451 is suited for portable drilling operations across light industrial, maintenance, and construction environments. Its reduced shank design allows the larger cutting diameter to be used in 1\/2 inch capacity chucks without requiring a dedicated large-capacity drill press. Typical users include machinists, pipefitters, ironworkers, and general maintenance technicians who need to drill through structural steel, cast iron components, or wood framing with standard portable equipment. It is a Series 190 bit from CHICAGO-LATROBE, a line aimed at general-purpose metalworking and mixed-material applications.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e51\/64 inch cutting diameter with 1\/2 inch reduced shank for use in standard portable drills\u003c\/li\u003e\n  \u003cli\u003eHigh speed steel construction for durability across ferrous and non-ferrous materials\u003c\/li\u003e\n  \u003cli\u003e118-degree standard point angle for general-purpose drilling versatility\u003c\/li\u003e\n  \u003cli\u003eCoated finish for improved wear resistance and chip evacuation\u003c\/li\u003e\n  \u003cli\u003eRight-hand cut with 2-flute regular spiral geometry\u003c\/li\u003e\n  \u003cli\u003eDiameter tolerance held to +0.0000 to -0.0012 inches for consistent hole sizing\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for use in 1\/2 inch capacity portable drills and drill presses. Suitable for drilling wood, alloy steel, carbon steel, and cast iron per manufacturer application data.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstall and remove this bit with the drill unplugged or the power source locked out. Secure the reduced shank firmly in the chuck and confirm full engagement before drilling. Use appropriate cutting fluid or coolant when drilling hard ferrous materials to extend bit life, noting that this bit is rated for dry operation. Inspect the cutting edges for wear or chipping before each use and replace when the point geometry is no longer intact.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDrill Bit Size\u003c\/strong\u003e: 51\/64 inch (0.7969 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 1\/2 inch (0.5000 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 6 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlute Length\u003c\/strong\u003e: 3-1\/8 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Length\u003c\/strong\u003e: 2.2500 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: Standard\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Type\u003c\/strong\u003e: Straight-Cylindrical\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\u003eTool Material\u003c\/strong\u003e: High Speed Steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoating\/Finish\u003c\/strong\u003e: Coated\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDiameter Tolerance\u003c\/strong\u003e: +0.0000 to -0.0012 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePrimary Workpiece Material\u003c\/strong\u003e: Wood\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSecondary Workpiece Materials\u003c\/strong\u003e: Alloy Steel, Carbon Steel, Cast Iron, Wood\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTool Application\u003c\/strong\u003e: Portable Drilling\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: 190\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.4747 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: CHICAGO-LATROBE\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 55451\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"CHICAGO-LATROBE","offers":[{"title":"Default Title","offer_id":51736756158770,"sku":"55451","price":60.84,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/d38bea85ea0235e287af73c262dca938.jpg?v=1788779974","url":"https:\/\/voomisupply.com\/products\/chicago-latrobe-55451-reduced-shank-drill-bit-51-64-in","provider":"Voomi Supply","version":"1.0","type":"link"}