{"product_id":"sandvik-coromant-7861125-turning-insert-vbmt331-um-4425","title":"Sandvik Coromant 7861125 Turning Insert VBMT331-UM 4425","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe SANDVIK COROMANT 7861125 is a VBMT-style indexable turning insert from the CoroTurn 107 series, ground from carbide stock and finished with a CVD-applied multilayer coating of Al2O3, TiN, and TiCN under manufacturer grade 4425. The insert features a 35-degree diamond shape (V-code), a 3\/8-inch inscribed circle, and a 0.40 mm corner radius with the UM chip breaker geometry. Neutral hand orientation means it mounts without left or right restriction. The combination of hard substrate and CVD coating targets general turning of steel and cast iron at production feed rates. Licensed machinists and CNC lathe operators are the primary installers.\u003c\/p\u003e\n\u003cp\u003eThis insert is designed for external and internal turning applications on CNC and manual lathes where a positive-rake, sharp-edged diamond insert geometry delivers clean chip control. Primary workpiece material is steel (ISO material group P); secondary workpiece material is cast iron (ISO material group K). The UM chip breaker geometry suits light-to-medium depth-of-cut finishing and semi-finishing passes. Two cutting edges are available per insert, and the insert is held by clamp or screw depending on the toolholder configuration used.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eCVD multilayer coating: Al2O3, TiN, and TiCN for wear resistance and thermal stability on steel and cast iron\u003c\/li\u003e\n  \u003cli\u003e35-degree diamond insert shape (V) with 5-degree relief angle (B clearance code) for positive cutting geometry\u003c\/li\u003e\n  \u003cli\u003e3\/8-inch (0.3750 inch) inscribed circle with 0.40 mm corner radius and UM chip breaker\u003c\/li\u003e\n  \u003cli\u003eNeutral hand orientation — compatible with both right-hand and left-hand toolholder setups\u003c\/li\u003e\n  \u003cli\u003eTwo usable cutting edges per insert, extending service life per unit\u003c\/li\u003e\n  \u003cli\u003eTolerance code M, ISO designation VBMT 16 04 04-UM 4425 for cross-reference to ISO toolholder systems\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for use with CoroTurn 107 series toolholders that accept VBMT-style inserts with a 0.1732-inch hole diameter and clamp or screw holding method. ISO code VBMT 16 04 04-UM 4425 may be used to cross-reference compatible toolholder systems.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation is performed by a qualified machinist or CNC tooling technician. Power down and lock out the machine spindle before changing inserts. Seat the insert fully against the toolholder pocket surfaces before tightening the clamp or screw; an improperly seated insert can fracture under cutting loads. Inspect the pocket and clamp for wear or debris before each insert index.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInsert Style\u003c\/strong\u003e: VBMT\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eISO Code\u003c\/strong\u003e: VBMT 16 04 04-UM 4425\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: CoroTurn 107\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInsert Shape\u003c\/strong\u003e: Diamond (V), 35-degree included angle\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Grade\u003c\/strong\u003e: 4425\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoating\u003c\/strong\u003e: Al2O3, TiN, TiCN (CVD process)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInsert Material\u003c\/strong\u003e: Carbide\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInscribed Circle\u003c\/strong\u003e: 3\/8 inch (0.3750 inch)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCorner Radius\u003c\/strong\u003e: 0.40 mm (0.0156 inch)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInsert Thickness\u003c\/strong\u003e: 3\/16 inch (0.1875 inch)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHole Diameter\u003c\/strong\u003e: 0.1732 inch (4.40 mm)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRelief Angle\u003c\/strong\u003e: 5 degrees (Clearance Code B)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eChip Breaker\u003c\/strong\u003e: UM\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInsert Hand\u003c\/strong\u003e: Neutral\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCutting Edges\u003c\/strong\u003e: 2\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHolding Method\u003c\/strong\u003e: Clamp or Screw\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePrimary Workpiece Material\u003c\/strong\u003e: Steel (ISO Code P)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSecondary Workpiece Material\u003c\/strong\u003e: Cast Iron (ISO Code K)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePackage Dimensions\u003c\/strong\u003e: 5.08 inches (L) x 2.13 inches (W) x 0.54 inches (H)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.54 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: 7861125\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SANDVIK COROMANT","offers":[{"title":"Default Title","offer_id":51733642281266,"sku":"7861125","price":381.76,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/129af6c517dd91e3e44a9200800dbbe7.jpg?v=1788757353","url":"https:\/\/voomisupply.com\/products\/sandvik-coromant-7861125-turning-insert-vbmt331-um-4425","provider":"Voomi Supply","version":"1.0","type":"link"}