{"product_id":"kennametal-1157889-milling-insert-spch090308t-kc725m","title":"Kennametal 1157889 Milling Insert SPCH090308T KC725M","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe KENNAMETAL 1157889 is a solid carbide milling insert in the SPCH series, designed for indexable milling applications in demanding metal-cutting environments. The insert carries a PVD-applied TiN\/TiCN\/TiN multilayer coating under manufacturer grade KC725M, which targets steel, stainless steel, superalloys, and titanium workpiece materials. The square SPCH090308T geometry features a 90-degree included angle, a neutral hand orientation, and a 0.0313-inch corner radius. At 0.1252 inches thick with a 0.5000-inch inscribed circle, it fits standard screw-held toolholders sized for the SPCH insert series. Licensed machinists and CNC setup technicians are the primary installers of this insert.\u003c\/p\u003e\u003cp\u003eThis insert is suited for roughing and semi-finishing milling passes on steel (P-grade), stainless steel (M-grade), superalloys, and titanium (S-grade) workpieces. It performs in both horizontal and vertical milling setups where a square insert profile and positive relief angle are appropriate. The size code 322 and ISO designation SPCH090308T place it in a well-established toolholder family used across production machining, job shops, and aerospace component work. The T chip breaker geometry assists with chip control across the primary workpiece material range.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003ePVD-coated TiN\/TiCN\/TiN multilayer coating for wear resistance across steel and superalloy cuts\u003c\/li\u003e\n\u003cli\u003eSolid carbide substrate in manufacturer grade KC725M rated for C5, C6, and C7 material groups\u003c\/li\u003e\n\u003cli\u003eSquare insert shape with 90-degree included angle and neutral hand for versatile milling orientations\u003c\/li\u003e\n\u003cli\u003e0.0313-inch corner radius for controlled edge engagement and surface finish\u003c\/li\u003e\n\u003cli\u003eScrew-held mounting method for secure, repeatable insert indexing\u003c\/li\u003e\n\u003cli\u003eT chip breaker geometry suited to steel, stainless steel, superalloys, and titanium applications\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style replacement for indexable milling toolholders that accept SPCH-series square inserts with ISO designation SPCH090308T and a 0.1563-inch hole diameter.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInsert installation and indexing should be performed by a qualified machinist or CNC tooling technician. Power down and lock out the spindle before changing inserts. Use the correct torque screwdriver specified by the toolholder manufacturer for the insert clamping screw — do not overtighten or use impact tools. Inspect the toolholder pocket seating surface and screw threads for wear or debris before seating the replacement insert.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Style\u003c\/strong\u003e: SPCH\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eISO Code\u003c\/strong\u003e: SPCH090308T\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Shape\u003c\/strong\u003e: Square\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Material\u003c\/strong\u003e: Solid Carbide\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Grade\u003c\/strong\u003e: KC725M\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial Grade\u003c\/strong\u003e: C5, C6, C7\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating\/Finish\u003c\/strong\u003e: TiN, TiCN, TiN\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating Process\u003c\/strong\u003e: PVD\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInscribed Circle\u003c\/strong\u003e: 0.5000 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThickness\u003c\/strong\u003e: 0.1252 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCorner Radius\u003c\/strong\u003e: 0.0313 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHole Diameter\u003c\/strong\u003e: 0.1563 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRelief Angle\u003c\/strong\u003e: 11.00 degrees\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncluded Angle\u003c\/strong\u003e: 90 degrees\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Hand\u003c\/strong\u003e: Neutral\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChip Breaker\u003c\/strong\u003e: T\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Holding Method\u003c\/strong\u003e: Screw\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrimary Workpiece Material\u003c\/strong\u003e: Steel, Stainless Steel, Superalloys, Titanium\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Size Code\u003c\/strong\u003e: 322\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.0661 pounds\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: KENNAMETAL\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 1157889\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"KENNAMETAL","offers":[{"title":"Default Title","offer_id":51752856748338,"sku":"1157889","price":284.49,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/33348d95ed5dc127623d83a2d509315e.jpg?v=1788930687","url":"https:\/\/voomisupply.com\/products\/kennametal-1157889-milling-insert-spch090308t-kc725m","provider":"Voomi Supply","version":"1.0","type":"link"}