{"product_id":"cleveland-c70188-cobalt-jobber-drill-bit-size-55","title":"Cleveland C70188 Cobalt Jobber Drill Bit Size 55","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe CLEVELAND C70188 is a cobalt jobber length drill bit designed for precision drilling in metal fabrication and maintenance applications. Manufactured from M42 cobalt high-speed steel with a gold oxide coating, this bit delivers extended tool life when working with hard or abrasive materials. It carries a 135-degree split point for fast starts without center-punching and a web-thinned, tapered web configuration that reduces thrust. The straight-cylindrical shank measures 0.0520 inches in diameter, matching the wire gauge No. 55 drill size. Licensed HVAC, plumbing, and electrical technicians frequently reach for this size when drilling small-diameter pilot holes in sheet metal enclosures, brackets, and equipment panels.\u003c\/p\u003e\n\u003cp\u003eThe C70188 is suited for drilling aluminum as its primary workpiece material, making it a practical choice for light-gauge sheet metal work, HVAC duct hardware, electrical panel fabrication, and plumbing fixture rough-in. The two-flute spiral design with regular spiral type clears chips efficiently in through-hole drilling. The 1-7\/8 inch overall length fits standard drill chucks and close-quarters drill guides common in service work. Conformance to NAS 907 Type J ensures the bit meets aerospace and industrial dimensional standards, making it appropriate for precision trade applications where hole tolerance matters.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eM42 cobalt steel construction for heat and wear resistance during metal drilling\u003c\/li\u003e\n  \u003cli\u003eGold oxide coating reduces friction and extends cutting life\u003c\/li\u003e\n  \u003cli\u003e135-degree split point starts on contact without center-punching\u003c\/li\u003e\n  \u003cli\u003eWeb-thinned tapered web reduces drilling thrust and feed force\u003c\/li\u003e\n  \u003cli\u003eTwo-flute regular spiral flute design for efficient chip evacuation\u003c\/li\u003e\n  \u003cli\u003eMeets NAS 907 Type J dimensional standard for consistent hole tolerance\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style jobber length drill bit in wire gauge size No. 55 with a straight-cylindrical shank, compatible with standard keyed and keyless drill chucks accepting shank diameters of 0.0520 inches.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eUse with a variable-speed drill press or hand drill set to an appropriate low-to-moderate speed for cobalt bits in metal stock. Always secure the workpiece before drilling to prevent bit walking or breakage at this small diameter. Cutting fluid or light oil is recommended when drilling aluminum or steel to preserve coating life and maintain hole tolerance. Dispose of worn bits per shop safety protocols and inspect for tip damage before each use.\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. 55\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDrill Bit Size (Decimal Inch)\u003c\/strong\u003e: 0.0520 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDrill Bit Material\u003c\/strong\u003e: M42 Cobalt High-Speed Steel\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\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSpiral Type\u003c\/strong\u003e: Regular\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\u003eFinish\/Coating\u003c\/strong\u003e: Gold Oxide\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 1-7\/8 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlute Length\u003c\/strong\u003e: 7\/8 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Type\u003c\/strong\u003e: Straight-Cylindrical\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 0.0520 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Length\u003c\/strong\u003e: 1.0000 inches\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\u003eWeb Configuration\u003c\/strong\u003e: Web-Thinned Tapered\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePrimary Workpiece Material\u003c\/strong\u003e: Aluminum\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDrill Bit Grade\u003c\/strong\u003e: Heavy Duty\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStandard\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: 0.1 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: CLEVELAND\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: C70188\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"CLEVELAND CONTROLS","offers":[{"title":"Default Title","offer_id":51709561274674,"sku":"C70188","price":49.8,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/68e71fac92ed610a068aecfe4d190284_68f0267e-96bd-48cc-a909-98d276006c44.jpg?v=1788458000","url":"https:\/\/voomisupply.com\/products\/cleveland-c70188-cobalt-jobber-drill-bit-size-55","provider":"Voomi Supply","version":"1.0","type":"link"}