{"product_id":"osg-8690990-solid-carbide-stub-drill-bit-0-3898-in","title":"Osg 8690990 Solid Carbide Stub Drill Bit 0.3898 in","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe OSG 8690990 is a solid carbide screw machine length drill bit designed for high-precision drilling in demanding production environments. Built to Series 6500 specifications, this stub-length drill measures 0.3898 inches (9.90 mm) in diameter with a 140-degree point angle for improved centering and reduced thrust. The EgiAs coating provides enhanced wear resistance and lubricity, extending tool life in ferrous and non-ferrous materials. Coolant-through capability supports high-speed drilling applications where heat management is critical. This bit is suited for CNC machining centers and drill presses operated by machinists and tool-and-die professionals.\u003c\/p\u003e\u003cp\u003eThis drill bit is intended for screw machine and short-hole drilling applications where rigidity and runout control are priorities. The stub length reduces deflection compared to jobber-length bits, making it well suited for production drilling in tight setups or shallow-depth holes. The straight-cylindrical shank fits standard drill chucks and collet holders. Applications include precision hole making in metal fabrication, automotive components, aerospace parts, and general machining operations requiring tight tolerances.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eSolid carbide construction for rigidity and wear resistance in hard or abrasive materials\u003c\/li\u003e\n\u003cli\u003eEgiAs finish for improved lubricity and extended tool life\u003c\/li\u003e\n\u003cli\u003e140-degree point angle reduces walking and improves entry accuracy\u003c\/li\u003e\n\u003cli\u003eCoolant-through design supports high-speed and deep-hole drilling\u003c\/li\u003e\n\u003cli\u003eX-Thinned web reduces cutting forces and improves chip evacuation\u003c\/li\u003e\n\u003cli\u003eSpiral flute geometry promotes consistent chip clearing in blind and through holes\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style screw machine length drill bit fitting standard straight-cylindrical shank drill chucks and collet holders in the 0.3500 to 0.4000 inch (9.50 to 11.00 mm) diameter range.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation and tool changes should be performed by qualified machinists with the spindle fully powered down and locked out per applicable machine guarding standards. Verify chuck or collet runout before use to protect the carbide shank from fracture. Coolant-through setups require compatible toolholders and adequate coolant pressure as specified by the machine manufacturer. Handle solid carbide tooling carefully to avoid chipping edges during setup.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Diameter\u003c\/strong\u003e: 0.3898 inches (9.90 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 4.173 inches (106.00 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute Length\u003c\/strong\u003e: 1.969 inches (50.00 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 0.394 inches (10.00 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Point Angle\u003c\/strong\u003e: 140 degrees\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute Type\u003c\/strong\u003e: Spiral\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Type\u003c\/strong\u003e: Straight-Cylindrical\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTool Material\u003c\/strong\u003e: Solid Carbide\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating\/Finish\u003c\/strong\u003e: EgiAs\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeb Thinning\u003c\/strong\u003e: X-Thinned\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoolant Through\u003c\/strong\u003e: Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Length Type\u003c\/strong\u003e: Stub (Screw Machine)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: 6500\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Size Range\u003c\/strong\u003e: 0.3500 to 0.4000 inches (9.50 to 11.00 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.205 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Dimensions\u003c\/strong\u003e: 4.35 x 0.65 x 0.5 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Quantity\u003c\/strong\u003e: 1\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: 8690990\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"OSG","offers":[{"title":"Default Title","offer_id":51727814689074,"sku":"8690990","price":256.24,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/8b46ad03ea5170bff9de3e121ee42436_4d4ceebe-9cc0-4774-9e2c-0450b1a2d9f4.jpg?v=1788682905","url":"https:\/\/voomisupply.com\/products\/osg-8690990-solid-carbide-stub-drill-bit-0-3898-in","provider":"Voomi Supply","version":"1.0","type":"link"}