{"product_id":"sumitomo-5uhy046-screw-machine-drill-bit-0-2559-in","title":"Sumitomo 5UHY046 Screw Machine Drill Bit 0.2559 in","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe SUMITOMO 5UHY046 is a screw machine length drill bit engineered for high-performance drilling in cast iron and steel. Built from solid carbide with a coated finish, it delivers the hardness and wear resistance needed for production drilling environments. The bit measures 6.50 mm (0.2559 inches) in diameter with a 135-degree split-point geometry that reduces thrust and improves self-centering on entry. At 73 mm (2.874 inches) overall length, this is a stub-style bit suited to close-clearance and short-travel drilling applications. It features a straight-cylindrical shank and is part of the MDW-GS series. Licensed machinists, toolroom technicians, and CNC setup personnel are the typical users.\u003c\/p\u003e\u003cp\u003eThis drill bit is designed for screw machine and short-hole drilling operations in ferrous materials, specifically cast iron and steel. The 2xD flute-to-diameter ratio and tapered web configuration promote chip evacuation and reduce walking on hard materials. It fits standard drill chucks and collet holders accepting a 7 mm straight shank. Typical applications include production machining, component drilling on CNC machining centers, and manual drill press work where short flute length aids rigidity and accuracy.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eSolid carbide construction for hardness and wear resistance in ferrous materials\u003c\/li\u003e\n\u003cli\u003e135-degree drill point angle for reduced entry thrust and improved self-centering\u003c\/li\u003e\n\u003cli\u003eCoated finish extends tool life in cast iron and steel applications\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 chucks and collet holders accepting 7 mm shanks\u003c\/li\u003e\n\u003cli\u003eScrew machine length (stub) design maximizes rigidity in short-travel drilling setups\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a direct-fit replacement within the SUMITOMO MDW-GS series for drilling cast iron and steel workpieces; compatible with drill chucks and collet systems accepting a 7 mm straight-cylindrical shank.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstall in a properly sized collet or drill chuck rated for the shank diameter before use. Ensure the machine spindle is fully stopped and locked out before changing tooling. Solid carbide bits are brittle compared to HSS — avoid side-loading or interrupted cuts that could cause chipping. Verify runout with a dial indicator after seating to protect both the tool and the workpiece.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Diameter\u003c\/strong\u003e: 6.50 mm (0.2559 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 73.00 mm (2.874 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute Length\u003c\/strong\u003e: 31.00 mm (1.2205 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 7.00 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Length\u003c\/strong\u003e: 40.00 mm (1.5748 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Drilling Depth\u003c\/strong\u003e: 21.25 mm (0.8366 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Point Length\u003c\/strong\u003e: 1.35 mm (0.0530 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\u003eNumber of Flutes\u003c\/strong\u003e: 2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute-to-Diameter Ratio\u003c\/strong\u003e: 2xD\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeb Configuration\u003c\/strong\u003e: Tapered\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: Coated\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\u003eDrill Bit Diameter Tolerance\u003c\/strong\u003e: h8\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Length Type\u003c\/strong\u003e: Screw Machine\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: 0.1 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: SUMITOMO\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 5UHY046\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SUMITOMO","offers":[{"title":"Default Title","offer_id":51748492083506,"sku":"5UHY046","price":132.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/ee29351176662a20f1a115ceb5d3b34b.jpg?v=1788894396","url":"https:\/\/voomisupply.com\/products\/sumitomo-5uhy046-screw-machine-drill-bit-0-2559-in","provider":"Voomi Supply","version":"1.0","type":"link"}