{"product_id":"cleveland-c70281-letter-b-screw-machine-drill-bit-hss","title":"Cleveland C70281 Letter B Screw Machine Drill Bit Hss","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe CLEVELAND C70281 is a screw machine length drill bit sized to Letter B (0.2380 inches) and built from high-speed steel (HSS) with a bright, uncoated finish. The 135-degree split point reduces thrust at entry and self-centers without a pilot hole, making it well suited for production drilling in alloy steel and aluminum. The web-thinned, parallel-web design keeps cutting action consistent across the full depth. At 2.5 inches overall length, this stub-length bit delivers rigidity and reduced deflection compared to jobber-length alternatives. It is a heavy-duty grade bit conforming to ASME B94.11M and NAS 907 Type C standards.\u003c\/p\u003e\n\u003cp\u003eThis bit is intended for use in screw machine operations, CNC drilling centers, drill presses, and hand-held power tools where a compact, rigid bit is required. Primary workpiece materials include alloy steel and aluminum. The straight cylindrical shank diameter matches the bit diameter at 0.2380 inches, allowing direct chuck mounting without adapters. The two-flute spiral design provides efficient chip evacuation in both ferrous and non-ferrous materials. Typical users include machinists, tool-and-die technicians, and maintenance professionals working in production or job-shop environments.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eLetter B size — 0.2380 inches diameter with a tolerance of +0.0000 to -0.0007 inches\u003c\/li\u003e\n  \u003cli\u003e135-degree split point for self-centering entry and reduced thrust\u003c\/li\u003e\n  \u003cli\u003eHigh-speed steel construction with bright, uncoated finish\u003c\/li\u003e\n  \u003cli\u003eScrew machine (stub) length — 2.5 inches OAL for maximum rigidity and minimal deflection\u003c\/li\u003e\n  \u003cli\u003eWeb-thinned parallel web for consistent cutting performance\u003c\/li\u003e\n  \u003cli\u003eConforms to ASME B94.11M and NAS 907 Type C specification\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style replacement or direct-use screw machine drill bit for production drilling applications in alloy steel and aluminum, compatible with standard three-jaw chucks accepting a 0.2380-inch straight cylindrical shank.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation and use should be performed by qualified machinists or maintenance technicians familiar with drill press and CNC machine operation. Secure the shank firmly in the chuck and verify concentricity before drilling. Always power down and lock out the machine before changing bits. Use appropriate cutting fluid recommendations for the workpiece material to extend tool life and maintain hole tolerance.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDrill Bit Size (Letter)\u003c\/strong\u003e: B\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDrill Bit Size (Decimal Inch)\u003c\/strong\u003e: 0.2380 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: High-Speed Steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoating\/Finish\u003c\/strong\u003e: Bright\/Uncoated\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 2\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSpiral Type\u003c\/strong\u003e: Regular\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlute Length\u003c\/strong\u003e: 1.375 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 2.5 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: 0.2380 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Length\u003c\/strong\u003e: 1.125 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\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\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\u003eDrill Bit Grade\u003c\/strong\u003e: Heavy Duty\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDiameter Tolerance\u003c\/strong\u003e: +0.0000 to -0.0007 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: 2330\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStandards\u003c\/strong\u003e: ASME B94.11M, NAS 907 Type C\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.3 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: C70281\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"CLEVELAND CONTROLS","offers":[{"title":"Default Title","offer_id":51701031043378,"sku":"C70281","price":14.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/65d59c5d84d088f5fd5069571a2a0a7a_8ee06577-87d2-48ff-b53d-ab89f371d04a.jpg?v=1788397067","url":"https:\/\/voomisupply.com\/products\/cleveland-c70281-letter-b-screw-machine-drill-bit-hss","provider":"Voomi Supply","version":"1.0","type":"link"}