wear resistance = harderwear resistance = harder toughness = softertoughness = softer Small Hole Boring • Insert Selection Guide The WIDIA™ three-step insert selection system makes choosing and 1 Select the Insert Geometry: applying the most productive tool easy. Tool recommendations are Based on the needed depth of cut and feed rate, based on six workpiece material groups. choose the geometry that best matches your needs. 2 Select the Grade: Determine your cutting conditions, and choose the proper grade. TN7–CM1 for Steel P ISO 513 01 10 20 30 40 TN7 — High edge strength and wear-resistant cermet. Finishing to semi-finishing of carbon, alloy, and stainless steels at medium to high speeds. ALO — Can withstand light interruptions. Alumina coating enables TN7 higher cutting speeds. ALO CG6 — High-speed, general-purpose grade for all kinds of steel and cast iron. CG6 CG55 — High edge strength and wear resistance. Reduces problems with built-up edge. Superior thermal deformation resistance and CG55 depth-of-cut notch resistance. CG5 CG5 — Best at low speeds. Will handle interruptions and high feed rates. CM1 CM1 — For heavy turning and heavily interrupted cuts. Hard Metal Coated ALO–CM1 for Stainless Steel M ISO 513 01 10 20 30 40 ALO ALO — Can withstand light interruptions. Alumina coating enables higher cutting speeds. C3 and C25 C3 and C25—Good wear resistance with some toughness. C2 C2 — Excellent abrasion resistance for machining cast irons, austenitic stainless steels,non-ferrous metals, non-metals, and most high-temperature alloys. CG6 CG6 — High-speed, general-purpose grade for all kinds of steel and cast iron. CG55 CG55 — High edge strength and wear resistance. Reduces problems withbuilt-up edge.Superior thermal deformation resistance and depth-of-cut notch resistance. CG5 CG5 — Best at low speeds. Will handle interruptions and high feed rates. CM1 CM1 — For heavy turning and heavily interrupted cuts. Hard Metal Coated D32 widia.com