{"product_id":"osg-300-3125-chucking-reamer-5-16-in-solid-carbide","title":"Osg 300-3125 Chucking Reamer 5\/16 in Solid Carbide","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe OSG 300-3125 is a solid carbide chucking reamer designed for precision hole finishing in general machining applications. With a 5\/16-inch (0.3125-inch) diameter and a tight tolerance of +0.0001 to +0.0005 inches, this reamer delivers accurate, consistent bore sizes in a single pass. The straight flute geometry and right-hand cut make it well suited for through-holes in a wide range of materials. It features a straight cylindrical shank for secure chuck retention and a 3-1\/4-inch overall length with a 1-1\/8-inch flute length. Machinists and tool room technicians are the primary users of this tool.\u003c\/p\u003e\n\u003cp\u003eThe OSG 300-3125 is intended for general machining environments including job shops, production floors, and maintenance tool rooms. It is used to bring drilled or bored holes to a finished diameter with controlled surface finish and dimensional accuracy. The straight flute design performs reliably in ferrous and non-ferrous materials. No coolant-through capability is present, so external flood or mist cooling is recommended when operating at higher spindle speeds or in tougher workpiece materials.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eSolid carbide construction provides rigidity and wear resistance for long tool life\u003c\/li\u003e\n  \u003cli\u003eDiameter tolerance of +0.0001 to +0.0005 inches supports tight-tolerance hole finishing\u003c\/li\u003e\n  \u003cli\u003eSix-flute straight configuration delivers smooth cutting action and good chip clearance\u003c\/li\u003e\n  \u003cli\u003eBright\/uncoated finish — compatible with a wide range of cutting fluids without coating interaction\u003c\/li\u003e\n  \u003cli\u003eStraight cylindrical shank fits standard drill chucks and collet holders\u003c\/li\u003e\n  \u003cli\u003eSeries 300D — OSG standard carbide reamer line for general machining use\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as a standard solid carbide chucking reamer for general machining applications requiring a 5\/16-inch finished bore diameter. Compatible with any machine tool spindle or lathe tailstock equipped with a chuck or collet capable of holding a straight cylindrical shank.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eChucking reamers are installed by machinists in drill presses, CNC machining centers, turret lathes, or manual mills. Secure the straight shank firmly in a precision collet or drill chuck before use, and verify runout is within acceptable limits to maintain diameter tolerance. Pre-drill or bore the hole to within 0.005 to 0.015 inches of finished diameter before reaming — do not use the reamer as a primary material-removal tool. Apply appropriate cutting fluid for the workpiece material, as this tool does not support internal coolant delivery.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eReamer Diameter\u003c\/strong\u003e: 5\/16 inches (0.3125 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eReamer Diameter (mm)\u003c\/strong\u003e: 7.90 mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDiameter Tolerance\u003c\/strong\u003e: +0.0001 to +0.0005 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 3-1\/4 inches (82.60 mm)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlute Length\u003c\/strong\u003e: 1-1\/8 inches (28.60 mm)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 6\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlute Type\u003c\/strong\u003e: Straight\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCutting Direction\u003c\/strong\u003e: Right Hand\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: Bright\/Uncoated\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: 300D\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUNSPSC Code\u003c\/strong\u003e: 23241611\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.1 pounds\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: 300-3125\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"OSG","offers":[{"title":"Default Title","offer_id":51747359031602,"sku":"300-3125","price":82.68,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/b3af7ad9693a92dc89007783f5a05a9f_9e7cdbf6-6ef8-4188-ab3d-d295aa9d1222.jpg?v=1788879031","url":"https:\/\/voomisupply.com\/products\/osg-300-3125-chucking-reamer-5-16-in-solid-carbide","provider":"Voomi Supply","version":"1.0","type":"link"}