{"product_id":"sandvik-coromant-6766859-hydraulic-chuck-sleeve","title":"Sandvik Coromant 6766859 Hydraulic Chuck Sleeve","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe SANDVIK COROMANT 6766859 is a slotted hydraulic chuck sleeve designed to adapt tooling within hydraulic chucks used in CNC machining centers and precision boring applications. It features a 6 mm inside diameter, a 12 mm outside diameter, and a 16 mm head diameter, with a length under head of 1.5748 inches (40 mm). Manufactured from steel, this sleeve supports coolant-through delivery, making it suitable for deep-bore and high-heat cutting operations. It is installed by machinists and toolroom technicians who require precise, repeatable tool positioning within hydraulic clamping systems.\u003c\/p\u003e\n\u003cp\u003eThis sleeve fits hydraulic chuck bodies where a 6 mm bore reduction is needed within a 12 mm chuck bore. The slotted design allows for proper coolant flow and pressure distribution during cutting. Typical applications include precision drilling, reaming, and finish boring on production CNC equipment. The coolant-through capability supports chip evacuation and tool life in ferrous and non-ferrous machining environments. The steel construction provides the dimensional stability required for tight-tolerance work in both job shop and high-volume production settings.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eSlotted sleeve design supports coolant-through delivery at rated pressure\u003c\/li\u003e\n  \u003cli\u003e6 mm inside diameter with 12 mm outside diameter for precise bore reduction within hydraulic chuck bodies\u003c\/li\u003e\n  \u003cli\u003e16 mm head diameter provides positive axial seating and registration\u003c\/li\u003e\n  \u003cli\u003eSteel construction for dimensional stability under clamping load and thermal cycling\u003c\/li\u003e\n  \u003cli\u003eLength under head of 1.5748 inches (40 mm) suits standard hydraulic chuck depth ranges\u003c\/li\u003e\n  \u003cli\u003ePackage quantity of 1 — sold as individual component\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style reduction sleeve for hydraulic chuck bodies accepting a 12 mm outside diameter sleeve with a 6 mm bore. Consult your hydraulic chuck manufacturer specifications to confirm sleeve fitment before installation.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation should be performed by a qualified machinist or toolroom technician familiar with hydraulic chuck systems. Ensure the machine spindle is fully stopped and the hydraulic chuck is depressurized before inserting or removing the sleeve. Clean the chuck bore and sleeve exterior thoroughly to remove chips, coolant residue, and debris that could affect seating and concentricity. Do not force the sleeve into the chuck bore; confirm inside and outside diameter compatibility with the chuck body specification before assembly.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInside Diameter\u003c\/strong\u003e: 6 mm (0.2362 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOutside Diameter\u003c\/strong\u003e: 12 mm (0.4724 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHead Diameter\u003c\/strong\u003e: 16 mm (0.6299 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength Under Head\u003c\/strong\u003e: 1.5748 inches (40 mm)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSleeve Type\u003c\/strong\u003e: Slotted\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoolant Through\u003c\/strong\u003e: Yes\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePressure\u003c\/strong\u003e: 1160 psi\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.0704 pounds\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUNSPSC Code\u003c\/strong\u003e: 27112800\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: 6766859\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SANDVIK COROMANT","offers":[{"title":"Default Title","offer_id":51727526330674,"sku":"6766859","price":322.21,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/431e526941dbcfe96116d8e12be9a47c.jpg?v=1788678886","url":"https:\/\/voomisupply.com\/products\/sandvik-coromant-6766859-hydraulic-chuck-sleeve","provider":"Voomi Supply","version":"1.0","type":"link"}