{"product_id":"cleveland-c15146-letter-q-cobalt-screw-machine-drill-bit","title":"Cleveland C15146 Letter Q Cobalt Screw Machine Drill Bit","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe CLEVELAND C15146 is a screw machine length drill bit sized to Letter Q (0.3320 inches) and manufactured from M42 cobalt high-speed steel. The 135-degree split point with web thinning starts on contact without a center punch, reducing walking and thrust on hard materials. A parabolic flute geometry promotes aggressive chip evacuation, making this bit well-suited for interrupted cuts and deep-hole work in tough stock. The straight-cylindrical shank measures 0.3320 inches in diameter with a shank length of 1.3125 inches. Overall length is 3.0 inches, consistent with screw machine length standards for short, rigid setups. This bit is designed for use by machinists and metalworking tradespeople on drill presses, CNC machining centers, and turret lathes.\u003c\/p\u003e\u003cp\u003eThe C15146 is intended for drilling alloy steels and aluminum in production and job-shop environments where tool life under heat and pressure is critical. The M42 cobalt grade (8 percent cobalt content) offers superior red hardness compared to standard M2 HSS, extending bit life when cutting work-hardened or abrasive materials without coolant through the tool. The screw machine length format keeps the tool short and stiff, minimizing deflection in close-tolerance applications typical of production drilling fixtures.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eLetter Q size: 0.3320 inches diameter with a tolerance of +0.0000 to -0.0010 inches\u003c\/li\u003e\n\u003cli\u003eM42 cobalt construction for extended tool life in alloy steel and aluminum\u003c\/li\u003e\n\u003cli\u003e135-degree split point with web thinning for self-centering starts and reduced thrust\u003c\/li\u003e\n\u003cli\u003eParabolic flute design promotes efficient chip evacuation in deep holes\u003c\/li\u003e\n\u003cli\u003eScrew machine length (3.0 inches OAL) provides rigidity and minimizes runout\u003c\/li\u003e\n\u003cli\u003eRight-hand cut with straight-cylindrical shank fits standard drill chucks and collets\u003c\/li\u003e\n\u003cli\u003eMeets ASME B94.11M standards; Series 2175A\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a screw machine length replacement or production drill bit for use in standard drill chucks and collets accepting a 0.3320-inch straight-cylindrical shank, compatible with primary workpiece materials including alloy steel and aluminum per Series 2175A specifications.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eA licensed machinist or qualified metalworking technician should install and operate this drill bit. Secure the shank fully in a properly sized chuck or collet before starting the spindle. Verify spindle speed and feed rate are appropriate for the workpiece material and bit diameter before commencing drilling. Do not force the bit through hardened material beyond its rated grade capability, and inspect for wear or chipping before each use.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Size (Letter)\u003c\/strong\u003e: Q\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Size (Decimal Inch)\u003c\/strong\u003e: 0.3320 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTool Material\u003c\/strong\u003e: M42 Cobalt High-Speed Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePoint 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: Parabolic\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeb Configuration\u003c\/strong\u003e: Parallel, Web-Thinned\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting Direction\u003c\/strong\u003e: Right Hand\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: 0.3320 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Length\u003c\/strong\u003e: 1.3125 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute Length\u003c\/strong\u003e: 1.6875 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 3.0 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Length Type\u003c\/strong\u003e: Screw Machine\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDiameter Tolerance\u003c\/strong\u003e: +0.0000 to -0.0010 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoolant Through\u003c\/strong\u003e: No\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\u003eSeries\u003c\/strong\u003e: 2175A\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: ANSI\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.6 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: C15146\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"CLEVELAND CONTROLS","offers":[{"title":"Default Title","offer_id":51716122116402,"sku":"C15146","price":56.16,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/a3df712ae7837ba34c2aa39e0a778c1b_6b4fe709-64a8-4159-99f6-5e12f4efbd6c.jpg?v=1788522049","url":"https:\/\/voomisupply.com\/products\/cleveland-c15146-letter-q-cobalt-screw-machine-drill-bit","provider":"Voomi Supply","version":"1.0","type":"link"}