A cutting edge family of Iscar turning inserts brings Sumo Tec performance and stability to CVD and DVD carbide grades. In identical tests in a selection of turning applications, the inserts outlasted their closest competitors by 26 to 288 percent. The key to the lengthened life is the Sumo Tec specific treatment, introduced in late '07 in a limited range of milling inserts, that perfects the coated surface and diminishes surface tension stresses in insert coatings. These lead cooler running, improved chipping resistance, decreased built up edge and faithfully longer edge life in all workpiece metals. During the alumina coating procedure, internal tension stresses occasionally cause cracks. The new Sumo Tec treatment leads to compression stresses, which aides to seal those cracks. The 7 brand new Sumo Tec turning grades consist of 2 for cast iron; 3 for steel and one for heat-resistant alloys and hardened steel. All the most desired insert geometries are offered from stock, with new geometries being added continually. Iscar also plans to add new grades as well.

Here are the grades available:

FOR CAST IRON
IC5005, with a hard substrate, MTCVD TiCN and thick Al2O3 coating, is endorsed mainly for nodular cast iron. It also handles other cast irons at medium to high cutting speeds at stationary or slightly unstable conditions. This grade may be used in hard cast irons when especially high wear resistance is required.

IC5010, presenting a tough substrate, MTCVD TiCN and thick Al2O3 coating, targets gray cast iron. It is advocated for interrupted cuts and unstable turning conditions in other metals.

FOR STEEL
IC8150, consisting of a incredibly hard substrate with a cobalt enriched outer layer, MTCVD TiCN and a thick alpha Al2O3 CVD coating. Featuring exceptional thermal stability and resistance to chipping, this grade is favored for high speed turning of steel subjugated to stable or slightly unstable conditions. It can also handle stainless steel and interrupted cuts in nodular cast iron.

IC8250, a tough substrate with the same outer layers. It features exceptional thermal stableness and resistance to plastic deformation and is endorsed for general machining of alloyed and stainless steel in a extended range of conditions.

IC8350, featuring a very tough substrate under the same outer layers. It accomplishes exceptional shock protection and great wear resistance on alloyed and stainless steel.

For Alloys, Stainless Steel and Hardened Steel
IC807, with a tough submicron substrate under a TiAlN PVD coating, is suitable for turning heat resistant alloys, austenitic stainless steel and hard steel at low to medium cutting speeds. In a test opposite to its closest competitor on all three materials, the betterment in tool life was up to 150%.

Key Test Results
Prior to introducing the new SUMO TEC turning tool line, ISCAR tested all grades against their closest opponent in a range of applications. Here are the crucial conclusions for grades 5005 and 5010 in cast iron. The betterment was 47% in SAE 1045 steel and 250% in 4140. In forging steel, the completely new Sumo Tec insert lasted twice as long.

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