WCMT 040208FN OS9101P Drilling Insert

Description

The WCMT 040208FN OS9101P is a trigon-style indexable insert widely used in U-drills and other indexable drilling systems where edge strength and predictable wear matter most. Built around a PVD-coated surface and a versatile application window, it supports mixed-material production across steels, stainless steels, and cast irons. Choose the WCMT 040208FN OS9101P when you want stable hole-making results with a practical speed range and good resistance to flank wear in everyday machining. In drilling, this grade family is intended for materials up to HRC <45 and is typically run within Vc 80–180 m/min, depending on workpiece group and setup rigidity. If you need a dependable insert for indexable drilling that stays consistent across common shop materials, the WCMT 040208FN OS9101P is a reliable option for standard production and job-shop work.

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Code Breakdown

• W = trigon insert shape (80°)

• C = clearance angle class “C”

• M = tolerance class “M”

• T = ISO clamping/hole style “T”

• 040208 = ISO size/thickness/radius code (the “08” commonly indicates 0.8 mm nose radius)

• FN = maker’s chipbreaker / edge-prep geometry code

• OS9101P = supplier grade in the OS9101 drilling family (ISO P20–P30 / M20–M30 / K20–K30, PVD, black, HRC <45, Vc 80–180)

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Key Features

• Universal ISO range for steel, stainless, and cast iron applications

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• PVD-coated, black finish for wear resistance in hole-making

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• Intended for indexable drilling tools (U-drills) with stable cutting conditions

• Practical cutting-speed window for consistent production drilling

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Equivalent (Sandvik, Seco, Kennametal, Iscar)

Select the WCMT 040208 insert size in each brand’s indexable drilling range, then match the closest chipformer/edge prep to “FN” based on your toolmaker’s recommendation.

Recommended Cutting Data / Application

• Operation: indexable drilling (U-drills), through holes and pre-drilled entry preferred

• Material groups: ISO P/M/K (P20–30, M20–30, K20–30)

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• Vc: 80–180 m/min (start lower for stainless/cast iron; raise for steels if stable)

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• Use coolant where possible; reduce speed for unstable clamping or interrupted entry.