{"product_id":"sumitomo-u101127-carbide-jobber-drill-bit-8-61mm-135deg","title":"Sumitomo U101127 Carbide Jobber Drill Bit 8.61mm 135deg","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe SUMITOMO U101127 is a solid carbide jobber length drill bit designed for precision metal cutting in demanding machining applications. It measures 8.61 mm (0.3390 inches) in diameter with a 135-degree drill point angle, an overall length of 3.8583 inches, and a straight-cylindrical shank diameter of 0.3594 inches. The bit carries a dual TiAlCr and TiSi coating that improves surface hardness and heat resistance during high-speed drilling. With two flutes and a tapered web configuration, it is suited for machinists and toolroom technicians working on ferrous metals and cast components.\u003c\/p\u003e\n\u003cp\u003eThis drill bit is built for metal cutting applications, specifically targeting cast iron and steel workpieces. The 4xD flute-to-diameter ratio provides sufficient chip evacuation during moderate-depth drilling passes. The MDW-GS series designation places it within a category of general-purpose solid carbide drills optimized for stable, repeatable hole quality in production and maintenance machining environments. It is sold individually and is appropriate for CNC machining centers, drill presses, and manual lathes with appropriate toolholding.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eSolid carbide construction for rigidity and wear resistance in ferrous metal cutting\u003c\/li\u003e\n  \u003cli\u003eDual TiAlCr and TiSi coating improves heat resistance and extends tool life\u003c\/li\u003e\n  \u003cli\u003e135-degree split point reduces thrust force and improves self-centering on entry\u003c\/li\u003e\n  \u003cli\u003eTapered web configuration supports chip flow and reduces cutting resistance\u003c\/li\u003e\n  \u003cli\u003eStraight-cylindrical shank fits standard drill chucks and collet toolholding\u003c\/li\u003e\n  \u003cli\u003eh8 diameter tolerance ensures consistent fit within tight hole-tolerance requirements\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for cutting cast iron and steel workpieces (primary workpiece material codes K and P). Sized within the 8.00 to 9.00 mm (0.3000 to 0.3500 inch) drill bit range. Part of the SUMITOMO MDW-GS series. Coolant-through capability is not available on this model.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eThis tool is intended for installation by machinists and toolroom technicians in a CNC or manual machining environment. Secure the shank fully in a compatible collet, drill chuck, or toolholder before operation, and verify runout is within acceptable limits for the application. Power down and lock out the machine spindle before changing or inspecting the bit. Solid carbide tooling is brittle and should not be subjected to side loads or impact beyond its rated cutting parameters.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDrill Bit Diameter\u003c\/strong\u003e: 8.61 mm (0.3390 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\u003eOverall Length\u003c\/strong\u003e: 3.8583 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlute Length\u003c\/strong\u003e: 2.1654 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Length\u003c\/strong\u003e: 1.6929 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 0.3594 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDrill Point Length\u003c\/strong\u003e: 1.80 mm (0.0709 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 2\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlute by Diameter Ratio\u003c\/strong\u003e: 4xD\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Solid Carbide\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoating\u003c\/strong\u003e: TiAlCr and TiSi\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Type\u003c\/strong\u003e: Straight-Cylindrical\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeb Configuration\u003c\/strong\u003e: Tapered\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDiameter Tolerance\u003c\/strong\u003e: h8\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePrimary Workpiece Material\u003c\/strong\u003e: Cast Iron, Steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTool Application\u003c\/strong\u003e: Metal Cutting\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoolant Through\u003c\/strong\u003e: No\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: MDW-GS\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.15 pounds\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePackage Quantity\u003c\/strong\u003e: 1\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: SUMITOMO\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: U101127\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SUMITOMO","offers":[{"title":"Default Title","offer_id":51728436887858,"sku":"U101127","price":146.06,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/de2a9c82c702389d5edc2630ca5d509d.jpg?v=1788691154","url":"https:\/\/voomisupply.com\/products\/sumitomo-u101127-carbide-jobber-drill-bit-8-61mm-135deg","provider":"Voomi Supply","version":"1.0","type":"link"}