{"product_id":"chicago-latrobe-46721-cobalt-jobber-drill-bit-no-51","title":"Chicago-latrobe 46721 Cobalt Jobber Drill Bit No 51","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe CHICAGO-LATROBE 46721 is a cobalt jobber length drill bit in wire gauge size No. 51, measuring 0.0670 inches in diameter. Built to Series 550 specifications, it features a 135-degree split point and a gold oxide coating for heat and wear resistance. The M42 cobalt steel construction handles high-hardness materials where standard high-speed steel bits fall short. At 2 inches overall length with a 1-inch spiral flute, this bit delivers controlled chip evacuation and consistent hole geometry. It is designed for right-hand cutting with a straight-cylindrical shank and web-thinned tapered web for reduced thrust on entry.\u003c\/p\u003e\n\u003cp\u003eThis drill bit is rated for high-performance drilling in titanium and other hard or abrasive metals. The cobalt M42 grade makes it a standard choice in aerospace, defense, and precision fabrication shops where NAS 907 Type J compliance is required. The gold oxide finish provides lubricity and extended tool life in interrupted cuts and stack drilling. It suits hand-held drill motors, drill presses, and CNC drilling operations where small-diameter, tight-tolerance holes are needed in challenging workpiece materials.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eM42 cobalt steel construction for drilling titanium, hardened steel, and other high-strength alloys\u003c\/li\u003e\n  \u003cli\u003e135-degree split point reduces walking and lowers thrust force on entry\u003c\/li\u003e\n  \u003cli\u003eGold oxide coating improves lubricity and extends service life in hard materials\u003c\/li\u003e\n  \u003cli\u003eWeb-thinned tapered web minimizes heat buildup and cutting resistance\u003c\/li\u003e\n  \u003cli\u003eMeets DIN 338 and NAS 907 Type J standards for aerospace and precision applications\u003c\/li\u003e\n  \u003cli\u003eRight-hand spiral flute with regular spiral type for efficient chip removal\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style replacement or direct-use jobber drill bit for applications requiring wire gauge size No. 51 (0.0670 inches) in Series 550 heavy-duty cobalt construction per NAS 907 Type J and DIN 338 specifications.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eThis bit is installed and operated by machinists, tool-and-die technicians, aerospace fabricators, and precision metalworkers. Before use, confirm the spindle and chuck are clear of debris and that the shank is fully seated and centered. Use appropriate cutting fluid or coolant when drilling titanium or hardened alloys to manage heat at the cutting edge. Operate at manufacturer-recommended speeds and feeds for the workpiece material to avoid premature edge wear or bit failure.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDrill Bit Size (Wire)\u003c\/strong\u003e: No. 51\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDrill Bit Diameter\u003c\/strong\u003e: 0.0670 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 2 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlute Length\u003c\/strong\u003e: 1 inch\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 0.0670 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Length\u003c\/strong\u003e: 1 inch\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Type\u003c\/strong\u003e: Straight-Cylindrical\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDrill Point Angle\u003c\/strong\u003e: 135 degrees\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePoint Type\u003c\/strong\u003e: Split\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\u003eNumber of Flutes\u003c\/strong\u003e: 2\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial Grade\u003c\/strong\u003e: M42 Cobalt\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFinish\/Coating\u003c\/strong\u003e: Gold Oxide\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeb Configuration\u003c\/strong\u003e: Tapered, Web-Thinned\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePrimary Workpiece Material\u003c\/strong\u003e: Titanium\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDiameter Tolerance\u003c\/strong\u003e: -0.0005 to 0.0000 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: 550\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStandards\u003c\/strong\u003e: DIN 338, NAS 907 Type J\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDrill Bit Grade\u003c\/strong\u003e: Heavy Duty\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoolant Through\u003c\/strong\u003e: No\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.0022 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: 46721\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"CHICAGO-LATROBE","offers":[{"title":"Default Title","offer_id":51730726191410,"sku":"46721","price":43.46,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/5e18f3a73fcc1e869d3fccf79cdc8be4_77c446f0-6f9f-44b3-ba20-22aa202f7cd9.jpg?v=1788721769","url":"https:\/\/voomisupply.com\/products\/chicago-latrobe-46721-cobalt-jobber-drill-bit-no-51","provider":"Voomi Supply","version":"1.0","type":"link"}