{"product_id":"cleveland-c70120-cobalt-jobber-drill-bit-8-1-mm","title":"Cleveland C70120 Cobalt Jobber Drill Bit 8.1 Mm","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe CLEVELAND C70120 is a cobalt jobber-length twist drill bit designed for demanding metal-removal applications in professional shop and field environments. Built to M42 cobalt steel material grade, this bit carries a gold oxide coating that aids in heat resistance and surface hardness. The split point geometry at 135 degrees reduces walking on entry and lowers thrust force compared to conventional 118-degree points. Right-hand spiral flutes in a regular helix evacuate chips efficiently, making this bit a reliable choice for machinists, maintenance technicians, and fabricators working with aluminum and other metals.\u003c\/p\u003e\u003cp\u003eThe C70120 fits standard jobber-length drill applications in machine shops, maintenance and repair operations, and light fabrication environments. Its 8.1 mm diameter and straight cylindrical shank seat directly into drill presses, hand drills, and CNC equipment using standard drill chucks. The gold oxide finish and M42 cobalt construction make it appropriate for high-production runs or intermittent use where tool longevity under heat and feed pressure matters. Primary workpiece material is aluminum, though cobalt-grade construction also handles steel and other ferrous alloys.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eM42 cobalt steel construction delivers elevated hardness and heat resistance over standard HSS bits\u003c\/li\u003e\n\u003cli\u003e135-degree split point reduces thrust and prevents bit walking on flat or curved workpiece surfaces\u003c\/li\u003e\n\u003cli\u003eGold oxide coating improves surface hardness and reduces friction during cutting\u003c\/li\u003e\n\u003cli\u003eWeb-thinned, tapered web design lowers cutting resistance and improves chip clearance\u003c\/li\u003e\n\u003cli\u003eRight-hand spiral flutes with regular helix provide consistent chip evacuation\u003c\/li\u003e\n\u003cli\u003eMeets NAS 907 Type J specification for dimensional and performance standards\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style jobber-length drill bit for use in standard drill chucks accepting a straight cylindrical shank; compatible with drill presses, hand drills, and CNC spindles sized for the 0.3189-inch shank diameter.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation of this bit is performed by machinists, fabricators, and maintenance technicians using standard drill chucks or collet systems. Ensure the chuck or collet is fully tightened and the workpiece is secured before operation. Set spindle speed appropriate to the workpiece material and bit diameter per standard machining feeds-and-speeds references. Inspect the cutting edges for wear or chipping before each use and replace the bit if the split point or flute geometry is damaged.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Diameter\u003c\/strong\u003e: 8.1 mm (0.3189 inches)\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 Point\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute Type\u003c\/strong\u003e: Spiral, Regular Helix\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 117 mm (4.6063 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute Length\u003c\/strong\u003e: 75 mm (2.9528 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Length\u003c\/strong\u003e: 42 mm (1.6535 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 0.3189 inches\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\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\u003eDrill Bit Grade\u003c\/strong\u003e: Heavy Duty\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrimary Workpiece Material\u003c\/strong\u003e: Aluminum\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDiameter Tolerance\u003c\/strong\u003e: -0.0010 to 0.0000 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecification\u003c\/strong\u003e: NAS 907 Type J\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: 2213\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: 0.4 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: CLEVELAND\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: C70120\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"CLEVELAND CONTROLS","offers":[{"title":"Default Title","offer_id":51708996157746,"sku":"C70120","price":22.78,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/68e71fac92ed610a068aecfe4d190284_d3f6bc31-4dcf-4871-ba1b-69c06718c5d1.jpg?v=1788449741","url":"https:\/\/voomisupply.com\/products\/cleveland-c70120-cobalt-jobber-drill-bit-8-1-mm","provider":"Voomi Supply","version":"1.0","type":"link"}