{"product_id":"osg-220-3970-solid-carbide-jobber-drill-bit-letter-x","title":"Osg 220-3970 Solid Carbide Jobber Drill Bit Letter X","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe OSG 220-3970 is a solid carbide jobber-length drill bit sized to Letter X (0.3970 inch \/ 10.08 mm) and built for production drilling in ferrous and non-ferrous materials. It features a 118-degree web-thinned point that reduces thrust and promotes self-centering entry, a regular spiral flute for chip evacuation, and a bright uncoated finish suited for dry or flood-coolant setups. Overall length is 4.5 inches with a 2.875-inch flute length. The straight-cylindrical shank fits standard drill chucks without adapters. This bit is part of OSG Series 220D and is classified as a general-purpose tool intended for professional machining environments.\u003c\/p\u003e\u003cp\u003eThe 220-3970 is designed for blind hole drilling, cross-hole drilling, through-hole drilling, and self-centering applications. Primary workpiece materials include steel, alloy steel, stainless steel, cast iron, aluminum, aluminum alloy, and aluminum silicate. It is appropriate for use in manual and CNC drilling setups where consistent diameter tolerance and chip control are required. Diameter tolerance is held to +0 to -0.013 mm, making it suitable for close-tolerance holes in production and maintenance machining work.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eSolid carbide construction for rigidity and wear resistance in hard materials\u003c\/li\u003e\n\u003cli\u003eWeb-thinned 118-degree point reduces entry thrust and supports self-centering\u003c\/li\u003e\n\u003cli\u003eRegular spiral flute design promotes efficient chip evacuation\u003c\/li\u003e\n\u003cli\u003eBright uncoated finish compatible with a range of cutting fluids and dry cutting\u003c\/li\u003e\n\u003cli\u003eStraight-cylindrical shank fits standard drill chucks without sleeves or adapters\u003c\/li\u003e\n\u003cli\u003eTight diameter tolerance (+0 to -0.013 mm) for consistent, repeatable hole sizing\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a general-purpose replacement or production drill bit for applications requiring Letter X sizing (0.3970 inch) in steel, stainless steel, cast iron, aluminum, and aluminum alloy workpieces across OSG Series 220D specifications.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation and use should be performed by qualified machinists or tooling technicians familiar with carbide drill bit handling. Secure the straight-cylindrical shank fully in a drill chuck or collet before operation and verify runout before cutting. Carbide tooling is brittle — avoid lateral loading, interrupted cuts without proper feed rate adjustments, or dropping the bit on hard surfaces. Follow shop safety standards and machine manufacturer guidelines for spindle speed and feed rate selection.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Size (Letter)\u003c\/strong\u003e: X\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Size (Decimal Inch)\u003c\/strong\u003e: 0.3970 inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Size (mm)\u003c\/strong\u003e: 10.08 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Point Angle\u003c\/strong\u003e: 118 degrees\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePoint Type\u003c\/strong\u003e: Web-Thinned\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute Type\u003c\/strong\u003e: Spiral (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\u003eShank Type\u003c\/strong\u003e: Straight-Cylindrical\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 10.08 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 4.5 inches (114.30 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute Length\u003c\/strong\u003e: 2.875 inches (73.00 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Material\u003c\/strong\u003e: Solid Carbide\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinish\/Coating\u003c\/strong\u003e: Bright\/Uncoated\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDiameter Tolerance\u003c\/strong\u003e: +0 to -0.013 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoolant Through\u003c\/strong\u003e: No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeb Configuration\u003c\/strong\u003e: Tapered\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTool Application\u003c\/strong\u003e: Blind Hole, Cross Hole, Drilling, Self-Centering\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrimary Workpiece Materials\u003c\/strong\u003e: Steel, Alloy Steel, Stainless Steel, Cast Iron, Aluminum, Aluminum Alloy, Aluminum Silicate\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: 220D\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.29 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: OSG\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 220-3970\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"OSG","offers":[{"title":"Default Title","offer_id":51737337921842,"sku":"220-3970","price":162.09,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/b4a25cb6fca78423402be763ec42128e_e40b1fe4-fa59-4e82-8616-8add5df3b285.jpg?v=1788787276","url":"https:\/\/voomisupply.com\/products\/osg-220-3970-solid-carbide-jobber-drill-bit-letter-x","provider":"Voomi Supply","version":"1.0","type":"link"}