{"product_id":"seco-00042506-mcmn-neutral-indexable-turning-toolholder","title":"Seco 00042506 Mcmn Neutral Indexable Turning Toolholder","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe SECO 00042506 is a neutral-hand MCMN-style indexable turning toolholder designed for external turning operations on CNC and manual lathes. It accepts CN..64. series inserts, specifically CNMG 643 geometry, held in place via a clamp-and-pin Multiple Lock system for rigid, repeatable insert positioning. The shank measures 1.25 inches wide by 1.25 inches tall with an overall length of 7 inches. Negative rake geometry at -7 degrees suits heavy interrupted cuts and hard materials. Licensed HVAC techs and licensed machinists running production or job-shop turning will find this holder a direct working tool for universal workpiece material ranges.\u003c\/p\u003e\u003cp\u003eThis toolholder is suited for turning applications across a broad range of workpiece materials, covering ISO material groups H, K, M, N, P, and S. That universal compatibility makes it appropriate for steel, stainless, cast iron, non-ferrous, high-temp alloys, and hardened materials. Typical install scenarios include facing, straight turning, and shoulder work on engine lathes or CNC turning centers where a neutral cutting direction is required to allow left-hand or right-hand pass flexibility. The head length of 1.67 inches and a back-of-bar to cutting-edge distance of 0.625 inches provide consistent tool offset for preset tooling systems.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eMCMN toolholder style with neutral hand for bidirectional cutting passes\u003c\/li\u003e\n\u003cli\u003eMultiple Lock clamp-and-pin insert retention for high stability under interrupted cuts\u003c\/li\u003e\n\u003cli\u003eNegative rake angle of -7 degrees suited to tough and hardened workpiece materials\u003c\/li\u003e\n\u003cli\u003eAccepts CNMG 643 inserts with a 0.75-inch inscribed circle\u003c\/li\u003e\n\u003cli\u003eSteel construction provides rigidity for heavy-duty turning applications\u003c\/li\u003e\n\u003cli\u003eUniversal workpiece material rating covers ISO groups H, K, M, N, P, and S\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned to accept CN..64. series inserts. Complete insert compatibility is confirmed for CNMG 643 geometry inserts with a 0.75-inch inscribed circle. No additional compatible model or system data was provided in the product specifications.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation and insert changes should be performed by a qualified machinist or tooling technician with the machine powered down and locked out per applicable machine-shop lockout-tagout procedures. Ensure the toolholder shank is properly clamped in the turret or tool post to the full shank engagement depth before operation. Inspect the insert pocket and locating pin for wear or debris before seating a new insert. Do not overtighten the clamp screw beyond the insert manufacturer-specified procedure to avoid pocket damage.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eToolholder Style\u003c\/strong\u003e: MCMN\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHand of Holder\u003c\/strong\u003e: Neutral\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting Direction\u003c\/strong\u003e: Neutral\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: -7 degrees\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Width\u003c\/strong\u003e: 1.25 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Height\u003c\/strong\u003e: 1.25 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 7 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHead Length\u003c\/strong\u003e: 1.67 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBack of Bar to Cutting Edge\u003c\/strong\u003e: 0.625 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\u003eInsert Compatibility\u003c\/strong\u003e: CN..64. (CNMG 643)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Holding Method\u003c\/strong\u003e: Clamp and Pin (Multiple Lock)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrimary Workpiece Material\u003c\/strong\u003e: Universal (ISO 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\u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: Multiple Lock\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturers Catalog Number\u003c\/strong\u003e: MCMNN206\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\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: 00042506\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SECO TOOLS","offers":[{"title":"Default Title","offer_id":51561915318578,"sku":"00042506","price":254.55,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/4bfbf8f4be0d5421a7eb48395ef8588d.jpg?v=1786469880","url":"https:\/\/voomisupply.com\/products\/seco-00042506-mcmn-neutral-indexable-turning-toolholder","provider":"Voomi Supply","version":"1.0","type":"link"}