{"product_id":"sandvik-coromant-5757851-threading-toolholder-external-rh","title":"Sandvik Coromant 5757851 Threading Toolholder External Rh","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe SANDVIK COROMANT 5757851 is an indexable external threading toolholder from the CoroThread 266 series, designed for right-hand threading operations on CNC lathes and turning centers. The holder features a 0.75 x 0.75 inch square shank with a 4.5-inch overall length, providing rigid support during thread-cutting passes. It accepts 266RG to 16 series inserts secured by a screw-clamping method, offering repeatable insert positioning for consistent thread form. The steel shank construction handles the cutting forces typical in external threading applications. Machinists and CNC setup technicians install this holder in standard turning or threading cycles on production and job-shop lathes.\u003c\/p\u003e\n\u003cp\u003eThis toolholder is suited for external threading operations on both production turning centers and manual engine lathes equipped with a 0.75-inch tool post or gang-slide slot. It is part of the CoroThread 266 system, which is built around a fixed geometry insert platform. The 1.0-inch center-to-cutting-edge measurement supports standard tooling height setup on machines with centerline shim adjustments. No coolant-through capability is present, so flood or mist coolant must be directed externally at the cutting zone.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eCoroThread 266 series platform accepts 266RG to 16 insert style for external threading\u003c\/li\u003e\n  \u003cli\u003eScrew-clamp insert holding method for secure, repeatable insert seating\u003c\/li\u003e\n  \u003cli\u003e0.75 x 0.75 inch square shank fits standard lathe toolholding blocks and turrets\u003c\/li\u003e\n  \u003cli\u003e4.5-inch overall length with 1.0-inch center-to-cutting-edge dimension\u003c\/li\u003e\n  \u003cli\u003eSteel shank construction for rigidity under threading load\u003c\/li\u003e\n  \u003cli\u003eRight-hand cutting orientation for conventional external threading direction\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for use with 266RG to 16 series indexable threading inserts within the SANDVIK COROMANT CoroThread 266 tooling system. Fits machine tool posts and turret blocks accommodating a 0.75 x 0.75 inch square shank.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation is performed by CNC machinists or lathe operators. Power down and lock out the machine spindle before inserting or removing the toolholder from the turret or tool post. Verify tool centerline height against the spindle centerline before initiating any threading cycle, as height offset directly affects thread form accuracy. Insert clamping screws should be tightened with the appropriate Torx or hex key driver per the insert manufacturer's torque guidance; do not overtighten, as this can damage the insert seat.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: CoroThread 266\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Type\u003c\/strong\u003e: External\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHand of Holder\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eToolholder Style\u003c\/strong\u003e: 266RFG\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInsert Compatibility\u003c\/strong\u003e: 266RG to 16\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInsert Holding Method\u003c\/strong\u003e: Screw\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInsert Inscribed Circle\u003c\/strong\u003e: 0.375 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Width\/Diameter\u003c\/strong\u003e: 0.75 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Height\u003c\/strong\u003e: 0.75 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Length\u003c\/strong\u003e: 4.5 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 4.5 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCenter to Cutting Edge\u003c\/strong\u003e: 1.0 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBack of Bar to Cutting Edge\u003c\/strong\u003e: 4.5 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eToolholder Material\u003c\/strong\u003e: Steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoolant Through\u003c\/strong\u003e: No\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.77 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: SANDVIK COROMANT\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 5757851\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SANDVIK COROMANT","offers":[{"title":"Default Title","offer_id":51755107320114,"sku":"5757851","price":329.03,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/e86eaa031e652f4d17867406381c8f2b_35518f86-f238-4777-bcf3-83ec99fc4428.jpg?v=1788951221","url":"https:\/\/voomisupply.com\/products\/sandvik-coromant-5757851-threading-toolholder-external-rh","provider":"Voomi Supply","version":"1.0","type":"link"}