{"product_id":"seco-00012669-lh-mcln-indexable-turning-toolholder-1x1-shank","title":"Seco 00012669 Lh Mcln Indexable Turning Toolholder 1x1 Shank","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe SECO 00012669 is a left-hand MCLN-style indexable turning toolholder designed for external turning operations on CNC lathes and manual turning centers. Built on a 1-inch by 1-inch square shank with an overall length of 6 inches, this toolholder uses a clamp-and-pin Multiple Lock system to secure negative-rake CN-style inserts. The negative rake angle of -5.46 degrees provides stable, controlled cutting performance across a broad range of workpiece materials. The holder is manufactured from steel and is intended for installation and use by machinists and toolroom technicians in production and job-shop environments.\u003c\/p\u003e\n\u003cp\u003eThis toolholder is suited for left-hand turning applications where the tool feeds from left to right relative to the workpiece. It accepts CNMG 643 inserts with a 0.75-inch inscribed circle, making it a practical choice for medium to heavy turning passes on universal workpiece materials, including ferrous metals, non-ferrous metals, stainless steels, superalloys, and cast materials corresponding to ISO material codes H, K, M, N, P, and S. The -5 degree lead angle geometry supports efficient chip flow and edge engagement during straight turning cuts.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eLeft-hand cutting direction for right-to-left spindle travel setups\u003c\/li\u003e\n  \u003cli\u003eMultiple Lock clamp-and-pin insert retention for rigid, repeatable insert seating\u003c\/li\u003e\n  \u003cli\u003eNegative rake geometry at -5.46 degrees for stable cutting on tough materials\u003c\/li\u003e\n  \u003cli\u003eAccepts CNMG 643 inserts with 0.75-inch inscribed circle\u003c\/li\u003e\n  \u003cli\u003eSteel construction for rigidity and durability under continuous turning loads\u003c\/li\u003e\n  \u003cli\u003eCompatible with universal workpiece materials across ISO codes H, K, M, N, P, and S\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eAccepts CNMG 643 inserts (CN..64. insert family) with a 0.75-inch inscribed circle. Insert holding method is clamp and pin. Compatible workpiece material codes: H, K, M, N, P, S.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation should be performed by a qualified machinist or toolroom technician. Ensure the machine spindle is fully stopped and locked out before mounting or removing the toolholder. Verify the turret pocket or tool post matches the 1-inch by 1-inch shank dimensions before clamping. Confirm insert seating and clamp torque per the machine tool and insert manufacturer guidelines before initiating a cut.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eToolholder Style\u003c\/strong\u003e: MCLN\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHand of Holder\u003c\/strong\u003e: Left Hand\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCutting Direction\u003c\/strong\u003e: Left Hand\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRake\u003c\/strong\u003e: Negative\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRake Angle\u003c\/strong\u003e: -5.46 degrees\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLead Angle\u003c\/strong\u003e: -5 degrees\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Width\u003c\/strong\u003e: 1 inch\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Height\u003c\/strong\u003e: 1 inch\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 6 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHead Length\u003c\/strong\u003e: 1.49 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBack of Bar to Cutting Edge\u003c\/strong\u003e: 1.25 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInsert Inscribed Circle\u003c\/strong\u003e: 0.75 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompatible Insert\u003c\/strong\u003e: CNMG 643\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInsert Holding Method\u003c\/strong\u003e: Clamp and Pin\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: Multiple Lock\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCutting Tool Application\u003c\/strong\u003e: Turning\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePrimary Workpiece Material\u003c\/strong\u003e: Universal (H, K, M, N, P, S)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoolant Through\u003c\/strong\u003e: No\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eToolholder Material\u003c\/strong\u003e: Steel\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: SECO\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 00012669\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SECO TOOLS","offers":[{"title":"Default Title","offer_id":51558190678322,"sku":"00012669","price":190.7,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/29a2117c1bc0bf78bf7a248c1f672a7c.jpg?v=1786405809","url":"https:\/\/voomisupply.com\/products\/seco-00012669-lh-mcln-indexable-turning-toolholder-1x1-shank","provider":"Voomi Supply","version":"1.0","type":"link"}