{"product_id":"seco-00012888-indexable-turning-toolholder-mvjnr-20-4d","title":"Seco 00012888 Indexable Turning Toolholder MVJNR-20-4D","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe SECO 00012888 is a right-hand indexable turning toolholder in the MVJN style, designed to accept VNMG 432 inserts secured by a top clamp holding method. It features a 1.25-inch square shank and an overall length of 6 inches, making it a rigid, direct-fit solution for external turning operations on CNC lathes and manual turning centers. The negative rake geometry (-4 degrees rake angle) supports interrupted cuts and harder workpiece materials. Installation and setup are performed by machinists and CNC operators in production and job-shop environments.\u003c\/p\u003e\u003cp\u003eThis toolholder is suited for a wide range of turning applications across multiple workpiece material categories, including steel, stainless steel, cast iron, non-ferrous alloys, high-temperature alloys, and other universal material groups as indicated by material codes H, K, M, N, P, and S. It is part of the SECO Multi-Directional Turning (MDT) series, which is optimized for external right-hand cutting direction in both roughing and finishing passes.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eMVJN toolholder style with right-hand cutting direction and negative rake for stable, high-force cuts\u003c\/li\u003e\n\u003cli\u003eAccepts VNMG 432 inserts with a 0.5-inch inscribed circle via top clamp retention\u003c\/li\u003e\n\u003cli\u003e1.25 x 1.25 inch square shank for rigid machine interface\u003c\/li\u003e\n\u003cli\u003e6-inch overall length with 2-inch head length and 1.5-inch back-of-bar to cutting edge dimension\u003c\/li\u003e\n\u003cli\u003eCompatible with universal workpiece material groups: H, K, M, N, P, S\u003c\/li\u003e\n\u003cli\u003ePart of the SECO Multi-Directional Turning (MDT) series\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned for use with VNMG 432 inserts (compatible insert size code VN43) with a 0.5-inch inscribed circle. Fits standard 1.25 x 1.25 inch shank tool blocks and turrets on CNC lathes and turning centers configured for right-hand external turning.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation is performed by a qualified machinist or CNC setup technician. Confirm the machine turret or tool block accepts a 1.25 x 1.25 inch shank before mounting. Ensure the machine spindle is fully stopped and the control is in an e-stop or safe state before changing toolholders or inserts. Torque the clamp screw according to the insert manufacturer's specification for the clamp style used; do not overtighten, as this can damage the insert seat.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eToolholder Style\u003c\/strong\u003e: MVJN\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHand of Holder\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Compatibility\u003c\/strong\u003e: VNMG 432\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Holding Method\u003c\/strong\u003e: Clamp\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting Direction\u003c\/strong\u003e: Right 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: -4 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: 6 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHead Length\u003c\/strong\u003e: 2 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBack of Bar to Cutting Edge\u003c\/strong\u003e: 1.5 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Inscribed Circle\u003c\/strong\u003e: 0.5 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Insert Size Code\u003c\/strong\u003e: VN43\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrimary Workpiece Material Codes\u003c\/strong\u003e: H, K, M, N, P, S\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: Multi-Directional Turning (MDT)\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: 1 pound\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: 00012888\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SECO TOOLS","offers":[{"title":"Default Title","offer_id":51564174836018,"sku":"00012888","price":292.57,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/33b82b043795c1d0dc9365da34658b2e_cb28d60d-acab-408c-88f0-cd9d82fc74ae.jpg?v=1786513292","url":"https:\/\/voomisupply.com\/products\/seco-00012888-indexable-turning-toolholder-mvjnr-20-4d","provider":"Voomi Supply","version":"1.0","type":"link"}