{"product_id":"osg-257-2500-combo-drill-reamer-1-4-inch-solid-carbide","title":"Osg 257-2500 Combo Drill Reamer 1\/4 Inch Solid Carbide","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe OSG 257-2500 is a solid carbide combination drill reamer designed to drill and ream in a single operation, reducing setup time and tool changes in precision machining workflows. With a 1\/4 inch reamer diameter and 2.141 inch flute length, this tool delivers tight-tolerance finished holes in one pass. The bright uncoated finish makes it well suited for applications where coating adhesion or thermal properties of the base carbide are preferred. Machinists and tool-and-die professionals working in production or job-shop environments will find this tool effective for achieving reamed hole finishes without a secondary operation.\u003c\/p\u003e\n\u003cp\u003eThis combination drill reamer is appropriate for use in CNC machining centers, manual mills, and drill presses where 1\/4 inch reamed holes are required. It is intended for precision work in materials where solid carbide tooling provides the necessary rigidity and edge retention. The right-hand cutting direction and cylindrical shank make it compatible with standard ER collet chucks and drill chucks. Typical applications include component manufacturing, fixture building, and close-tolerance hole finishing in metalworking and general machining environments.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eSolid carbide construction provides rigidity and edge retention for close-tolerance reaming\u003c\/li\u003e\n  \u003cli\u003eCombination drill-and-ream design completes hole drilling and finishing in one pass\u003c\/li\u003e\n  \u003cli\u003e1\/4 inch reamer diameter with 2.141 inch flute length for controlled chip evacuation\u003c\/li\u003e\n  \u003cli\u003eBright uncoated finish suitable for applications where base carbide performance is preferred\u003c\/li\u003e\n  \u003cli\u003eRight-hand cutting direction compatible with standard machine spindle setups\u003c\/li\u003e\n  \u003cli\u003eCylindrical 1\/4 inch shank fits standard collet chucks and drill chucks\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as a direct-use solid carbide combination drill reamer for standard 1\/4 inch reamed hole applications in CNC and manual machining setups using cylindrical shank toolholders.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eThis tool should be installed by a qualified machinist familiar with carbide tooling handling. Secure the cylindrical shank in a properly sized collet chuck or drill chuck and verify runout before cutting. Carbide tooling is brittle and should not be subjected to interrupted cuts or side loading beyond intended parameters. Always confirm spindle speed and feed rate are appropriate for the workpiece material before engaging the tool.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eReamer Size (Fractional)\u003c\/strong\u003e: 1\/4 inch\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eReamer Size (Decimal)\u003c\/strong\u003e: 0.2500 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlute Length\u003c\/strong\u003e: 2.141 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length (OAL)\u003c\/strong\u003e: 4 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 1\/4 inch\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Type\u003c\/strong\u003e: Cylindrical\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCutting Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Solid Carbide\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoating\/Finish\u003c\/strong\u003e: Bright\/Uncoated\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.08 pounds\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePackage Quantity\u003c\/strong\u003e: 1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUNSPSC Code\u003c\/strong\u003e: 23241611\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: OSG\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 257-2500\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"OSG","offers":[{"title":"Default Title","offer_id":51737611567410,"sku":"257-2500","price":240.78,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/f8dcce89f7dec84dae7745206904c537_4ab5ab65-ab64-4389-9f4c-343a5725f947.jpg?v=1788791384","url":"https:\/\/voomisupply.com\/products\/osg-257-2500-combo-drill-reamer-1-4-inch-solid-carbide","provider":"Voomi Supply","version":"1.0","type":"link"}