{"product_id":"cleveland-c15121-screw-machine-drill-bit-wire-31-cobalt","title":"Cleveland C15121 Screw Machine Drill Bit Wire 31 Cobalt","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe CLEVELAND C15121 is a screw machine length drill bit designed for high-productivity drilling in tight-clearance applications. Built from M42 cobalt high-speed steel, it carries a wire gauge size of 31, corresponding to a decimal diameter of 0.1200 inches. The 135-degree split point and parabolic flute geometry reduce thrust force and improve chip evacuation, making this bit well suited for production drilling in alloy steels and aluminum. The straight-cylindrical shank seats securely in standard drill chucks. Overall length is 1-7\/8 inches, keeping the tool rigid and minimizing deflection during short-hole operations.\u003c\/p\u003e\n\u003cp\u003eThis drill bit is intended for use on drill presses, CNC machining centers, and hand-held power drills in shop and field environments. The screw machine length designation indicates a shortened flute and body length compared to jobber-length bits, which increases stiffness and accuracy in applications where hole depth is limited. Primary workpiece materials listed for this series include alloy steel and aluminum. The M42 cobalt material grade provides elevated red-hardness, making it appropriate for harder or abrasive workpiece materials that would wear standard HSS tooling prematurely. Machinists, tool-and-die tradespeople, and maintenance mechanics are the typical end users.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eM42 cobalt steel construction provides superior heat and wear resistance over standard HSS\u003c\/li\u003e\n  \u003cli\u003e135-degree split point reduces walking and lowers required thrust force at entry\u003c\/li\u003e\n  \u003cli\u003eParabolic flute geometry improves chip flow and helps prevent packing in deep cuts\u003c\/li\u003e\n  \u003cli\u003eWeb-thinned, parallel-web design reduces cutting resistance and extends tool life\u003c\/li\u003e\n  \u003cli\u003eScrew machine length body maximizes rigidity and minimizes deflection in short-hole work\u003c\/li\u003e\n  \u003cli\u003eDiameter tolerance held to +0.0000 to -0.0005 inches per ASME B94.11M\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for use in standard drill chucks accepting a 0.1200-inch straight-cylindrical shank. Suitable for drilling alloy steel and aluminum workpieces. Conforms to ASME B94.11M and ANSI specification designations as part of the Cleveland Series 2175A.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation and use of this drill bit should be performed by qualified machinists or tradespeople familiar with rotating cutting tool safety. Ensure the drill chuck is fully tightened and the workpiece is securely fixtured before beginning any operation. Match spindle speed and feed rate to the workpiece material per published cutting data for cobalt drill bits of this diameter. Inspect the cutting edges for wear or chipping before each use and replace the bit if the point geometry is compromised.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDrill Bit Size (Wire Gauge)\u003c\/strong\u003e: 31\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDrill Bit Diameter\u003c\/strong\u003e: 0.1200 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\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTool Material\u003c\/strong\u003e: Cobalt (M42)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlute Type\u003c\/strong\u003e: Parabolic\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\u003eDrill Length Type\u003c\/strong\u003e: Screw Machine\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: 0.1200 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Length\u003c\/strong\u003e: 1.0 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeb Configuration\u003c\/strong\u003e: Parallel, Web-Thinned\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoolant Through\u003c\/strong\u003e: No\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDiameter Tolerance\u003c\/strong\u003e: +0.0000 to -0.0005 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: 2175A\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStandards\u003c\/strong\u003e: ASME B94.11M, ANSI\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePrimary Workpiece Material\u003c\/strong\u003e: Alloy Steel, Aluminum\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: C15121\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"CLEVELAND CONTROLS","offers":[{"title":"Default Title","offer_id":51691393810738,"sku":"C15121","price":23.51,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/a3df712ae7837ba34c2aa39e0a778c1b_fb7557ec-b7e8-4719-a4f2-da0943dc4965.jpg?v=1788284427","url":"https:\/\/voomisupply.com\/products\/cleveland-c15121-screw-machine-drill-bit-wire-31-cobalt","provider":"Voomi Supply","version":"1.0","type":"link"}