{"product_id":"hertel-mr34-0685-406-chucking-reamer-0-0685-in-solid-carbide","title":"Hertel MR34-0685.406 Chucking Reamer 0.0685 in Solid Carbide","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe HERTEL MR34-0685.406 is a solid carbide chucking reamer designed for precision hole finishing in tight-tolerance machining applications. With a reamer diameter of 0.0685 inches (1.74 mm) and a 4-flute spiral configuration, it delivers consistent bore sizing and a polished finish in a single pass. The bright (polished) coating reduces friction and aids chip evacuation. Left-hand spiral flutes combined with right-hand cutting direction help pull chips away from the workpiece, making it well suited for blind-hole and through-hole finishing operations. Machinists and toolroom professionals install this reamer in CNC machining centers, drill presses, and manual lathes where repeatable bore geometry is required.\u003c\/p\u003e\u003cp\u003eThis reamer is intended for small-diameter precision boring work, particularly in materials where carbide offers a hardness and wear-resistance advantage over high-speed steel. The 0.0685-inch diameter falls within the 0.0500 to 0.0999-inch decimal inch range, placing it firmly in the micro and small-bore category. Typical applications include aerospace, medical device, and precision instrument component manufacturing where hole tolerances are held to very tight limits. The straight shank allows direct chuck mounting without adapters in standard drill chucks and collet systems.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eSolid carbide construction for hardness, wear resistance, and dimensional stability\u003c\/li\u003e\n\u003cli\u003e4-flute spiral design with left-hand spiral and right-hand cutting direction for efficient chip management\u003c\/li\u003e\n\u003cli\u003eBright (polished) finish reduces friction and improves surface finish in the bore\u003c\/li\u003e\n\u003cli\u003eReamer diameter tolerance of 0.0000 to +0.0003 mm for precision hole sizing\u003c\/li\u003e\n\u003cli\u003eStraight shank for direct mounting in standard chucks and collet systems\u003c\/li\u003e\n\u003cli\u003eCompact overall length of 1.9685 inches suits short-reach and confined-space applications\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style solid carbide chucking reamer for use in standard straight-shank tool holders, drill chucks, and collet systems capable of accepting a 0.0685-inch shank diameter in CNC and manual machining equipment.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation is performed by qualified machinists or toolroom technicians. Ensure the machine spindle and tool holder are fully stopped and de-energized before loading or unloading the reamer. Verify chuck or collet runout before use, as excessive runout at this diameter will directly affect bore tolerance and tool life. Follow the machine manufacturer and tooling supplier guidelines for speed, feed, and cutting fluid selection appropriate to the workpiece material.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eReamer Diameter\u003c\/strong\u003e: 0.0685 inches (1.74 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReamer Diameter Range\u003c\/strong\u003e: 0.0500 to 0.0999 inches (1.00 to 2.00 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 1.9685 inches (50.00 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute Length\u003c\/strong\u003e: 0.7087 inches (10.00 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 4\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute Type\u003c\/strong\u003e: Spiral\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpiral Direction\u003c\/strong\u003e: Left Hand\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTool Material\u003c\/strong\u003e: Solid Carbide\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Type\u003c\/strong\u003e: Straight\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating\/Finish\u003c\/strong\u003e: Bright (Polished)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReamer Diameter Tolerance\u003c\/strong\u003e: 0.0000 to +0.0003 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDowel Pin Reamer\u003c\/strong\u003e: No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOver\/Under Size Reamer\u003c\/strong\u003e: No\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: HERTEL\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: MR34-0685.406\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"HERTEL","offers":[{"title":"Default Title","offer_id":51753864954162,"sku":"MR34-0685.406","price":113.01,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/545540201a806e85fc1e81775170ac06.jpg?v=1788941626","url":"https:\/\/voomisupply.com\/products\/hertel-mr34-0685-406-chucking-reamer-0-0685-in-solid-carbide","provider":"Voomi Supply","version":"1.0","type":"link"}