{"product_id":"sumitomo-u101032-screw-machine-drill-bit-0-161-in-carbide","title":"Sumitomo U101032 Screw Machine Drill Bit 0.161 in Carbide","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe SUMITOMO U101032 is a screw machine length drill bit designed for precision drilling in ferrous materials. Built from solid carbide with a coated finish, it delivers the hardness and wear resistance needed for production-level work in cast iron and steel. The bit measures 0.161 inches (4.09 mm) in diameter with an overall length of 2.4016 inches and features a 135-degree split-point angle that reduces walking and requires no center punch on flat stock. Two flutes with a tapered web configuration promote chip evacuation during short-hole drilling operations. Licensed machinists, tool-and-die shops, and maintenance technicians routinely use this size in CNC machining centers, knee mills, and drill presses.\u003c\/p\u003e\u003cp\u003eThis bit is suited for screw machine length applications where a stub-length geometry provides rigidity and reduced runout compared to jobber-length equivalents. Primary workpiece materials are cast iron and steel. The flute-to-diameter ratio is 2xD, making it appropriate for through-holes and shallow blind holes up to a maximum drilling depth of 0.664 inches (16.87 mm). The straight-cylindrical shank seats directly in standard collets, keyless chucks, or ER toolholding systems without adapters.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eSolid carbide construction for hardness and thermal stability in ferrous materials\u003c\/li\u003e\n\u003cli\u003e135-degree drill point angle reduces thrust and eliminates the need for a center punch on flat surfaces\u003c\/li\u003e\n\u003cli\u003eCoated finish extends tool life in abrasive cast iron and steel applications\u003c\/li\u003e\n\u003cli\u003eTapered web configuration supports chip flow and reduces torque load\u003c\/li\u003e\n\u003cli\u003eStraight-cylindrical shank fits standard collets and chucks without adapters\u003c\/li\u003e\n\u003cli\u003e2xD flute-to-diameter ratio optimized for screw machine length short-hole drilling\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a screw machine length replacement drill bit for use in CNC machining centers, drill presses, and manual mills where a straight-cylindrical shank and carbide construction are required for drilling cast iron and steel workpieces.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation and tool changes should be performed by a qualified machinist with the spindle fully stopped and the machine in a locked-out, de-energized state per OSHA lockout\/tagout procedures. Confirm the shank is fully seated and the chuck or collet torqued to the toolholder specification before initiating a cut. Carbide tooling is brittle and susceptible to chipping from interrupted cuts or side loading — avoid using this bit as a reamer or applying lateral force. Verify coolant or cutting fluid compatibility with the workpiece material before use, noting that this bit does not support through-spindle coolant.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Diameter\u003c\/strong\u003e: 0.161 inches (4.09 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 2.4016 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute Length\u003c\/strong\u003e: 0.9055 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Length\u003c\/strong\u003e: 1.4173 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Drilling Depth\u003c\/strong\u003e: 0.664 inches (16.87 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Point Length\u003c\/strong\u003e: 0.0345 inches (0.85 mm)\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 by Diameter Ratio\u003c\/strong\u003e: 2xD\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\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\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\u003ePrimary Workpiece Material\u003c\/strong\u003e: Cast Iron, Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: MDW-GS\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Size Range\u003c\/strong\u003e: 0.150 to 0.200 inches (3.50 to 5.00 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Quantity\u003c\/strong\u003e: 1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.05 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: U101032\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SUMITOMO","offers":[{"title":"Default Title","offer_id":51734592520498,"sku":"U101032","price":110.16,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/7ef0bfb84d7fb8b35c70959bb5de14d7.jpg?v=1788763608","url":"https:\/\/voomisupply.com\/products\/sumitomo-u101032-screw-machine-drill-bit-0-161-in-carbide","provider":"Voomi Supply","version":"1.0","type":"link"}