A original family of Iscar turning inserts brings Sumo Tec performance and stability to CVD and DVD carbide grades. In identical tests in a range of turning applications, the inserts outlasted their immediate competitors by 26 to 288 percent. The key to the lengthened life is the Sumo Tec specific treatment, introduced in late 2007 in a limited range of milling inserts, that flattens the coated surface and diminishes surface tension stresses in insert coatings. These lead cooler running, improved chipping resistance, decreased built up edge and reliably longer edge life in all workpiece materials. During the alumina coating preparation, internal tension stresses sometimes cause cracks. The brand new Sumo Tec treatment coaxes compression stresses, which helps to seal those cracks. The 7 new Sumo Tec turning grades consist of two for cast iron; three for steel and 1 for heat-resistant alloys & hardened steel. All the most favorite insert geometries are available from stock, with new geometries being added frequently. 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 recommended mainly for nodular cast iron. It also handles other cast irons at medium to high cutting speeds at stable or slightly unstable conditions. This grade may be used in hard cast irons when unusually high wear resistance is essential.

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

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

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

IC8350, featuring a very tough substrate under the same outer layers. It delivers superb shock opposition 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 proper for turning heat resistant alloys, austenitic stainless steel and hard steel at low to medium cutting speeds. In a test opposite its closest competitor on all three materials, the improvement in tool life was up to 150%.

Key Test Results
Prior to introducing the new SUMO TEC turning tool family, ISCAR tested all grades against their closest opponent in a variety of utilization's. Here are the critical results for grades 5005 and 5010 in cast iron. The betterment was 47% in SAE 1045 steel and 250% in 4140. In forging steel, the cutting edge Sumo Tec insert lasted twice as long.