{"product_id":"cleveland-c15993-cobalt-drill-bit-31-64-in-135-degree","title":"Cleveland C15993 Cobalt Drill Bit 31\/64 in 135 Degree","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe CLEVELAND C15993 is a cobalt jobber length drill bit designed for demanding metal-cutting applications. Built from M42 cobalt high-speed steel with an oxide coating, it delivers heat resistance and edge retention when drilling hard or abrasive materials. The 135-degree split point reduces walking and decreases the thrust required to start a hole without a center punch. At 5-7\/8 inches overall length with a 2-3\/16 inch flute length, it fits standard jobber-length drill chucks and handles a wide range of hole depths in production and maintenance environments. This is a heavy-duty grade tool suited for machinists, maintenance technicians, and fabricators working with tough base metals.\u003c\/p\u003e\u003cp\u003eThe C15993 is rated for superalloy workpiece materials, making it well-suited for drilling stainless steel, nickel alloys, titanium, and similarly difficult metals where standard HSS bits lose their edge quickly. The fast spiral flute promotes chip evacuation to reduce heat buildup and prevent chip packing in deep-hole applications. Its straight-cylindrical shank accepts standard three-jaw drill chucks on benchtop drill presses, magnetic drills, and handheld power drills. Coolant-through capability is not supported, so external coolant or cutting oil application at the entry point is the standard approach for extended run production work.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eM42 cobalt steel construction for high heat resistance and extended tool life in hard metals\u003c\/li\u003e\n\u003cli\u003e135-degree split point reduces thrust and eliminates the need for a center punch on most applications\u003c\/li\u003e\n\u003cli\u003eOxide coating provides additional surface hardness and corrosion resistance\u003c\/li\u003e\n\u003cli\u003eFast spiral flute geometry promotes efficient chip evacuation\u003c\/li\u003e\n\u003cli\u003eWeb-thinned, tapered web configuration reduces cutting resistance at the center of the bit\u003c\/li\u003e\n\u003cli\u003eMeets ASME B94.11M standard for jobber length drill bits\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eThe C15993 is a Series 3780 jobber length drill bit with a 31\/64 inch straight-cylindrical shank, compatible with any standard three-jaw drill chuck accepting that shank diameter. It is suited for drilling superalloys and other hard metals in production machining, tool-and-die, and heavy maintenance applications.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstall the bit securely in a three-jaw drill chuck, ensuring the shank is fully seated and the chuck is tightened with a key or locking mechanism before operation. Disconnect power to the drill press or confirm the handheld tool is switched off before changing bits. Apply cutting oil or an appropriate metalworking lubricant to the drill point and workpiece surface when drilling superalloys to manage heat and extend bit life. Inspect the cutting edges before use — cobalt bits can be resharpened, but a damaged split point should be reground before drilling to avoid workpiece damage or breakage.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Size\u003c\/strong\u003e: 31\/64 inches (0.4844 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Material\u003c\/strong\u003e: Cobalt (M42)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Grade\u003c\/strong\u003e: Heavy Duty\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 (Fast)\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\u003eFinish\/Coating\u003c\/strong\u003e: Oxide\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 5-7\/8 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute Length\u003c\/strong\u003e: 2-3\/16 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 31\/64 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Length\u003c\/strong\u003e: 3-11\/16 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\u003eDiameter Tolerance\u003c\/strong\u003e: -0.0010 to 0.0000 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrimary Workpiece Material\u003c\/strong\u003e: Superalloy\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: 3780\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard\u003c\/strong\u003e: ASME B94.11M\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecification Designation\u003c\/strong\u003e: NAS\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 1 pound\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: C15993\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"CLEVELAND CONTROLS","offers":[{"title":"Default Title","offer_id":51722766123314,"sku":"C15993","price":46.23,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/02e10a3a26bea41aaf797649b8e4efcc_405c8a11-2106-43cb-8147-1f97f11c25b9.jpg?v=1788595593","url":"https:\/\/voomisupply.com\/products\/cleveland-c15993-cobalt-drill-bit-31-64-in-135-degree","provider":"Voomi Supply","version":"1.0","type":"link"}