WCMT 050308FN OS9101P Drilling Insert

The WCMT 050308FN OS9101 is a trigon-style indexable insert commonly used in U-drills and other indexable drilling tools where stable edge strength and predictable wear are critical. With a PVD-coated black surface and a balanced substrate, it’s designed for multi-material production environments covering ISO P, M, and K ranges. Use the WCMT 050308FN OS9101 when you need consistent hole-making performance in steels, stainless steels, and cast irons under controlled loads. In drilling operations, this insert grade targets materials up to about HRC 45 and supports practical cutting speeds without sacrificing edge reliability. If you need a dependable drill insert for everyday machining, the WCMT 050308FN OS9101 is a solid choice for standard production and job-shop work.

Code Breakdown

• W = 80° trigon insert shape

• C = clearance angle (relief) class “C”

• M = tolerance class “M”

• T = clamping/hole style “T” (ISO designation element)

• 050308 = size / thickness / nose radius (ISO-coded); 08 typically denotes 0.8 mm corner radius

• FN = manufacturer chipbreaker/edge-prep geometry code

• OS9101 = PVD grade for Drilling Machining, ISO P20–P30 / M20–M30 / K20–K30, HRC <45, Vc 80–180 m/min

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Key Features

• Black PVD coating for wear resistance in hole-making

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• Universal ISO range: P / M / K for mixed-material production

• Optimized for indexable drilling (U-drills) and stable cutting edges

• Suitable up to HRC <45 with recommended Vc 80–180 m/min

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Equivalent (Sandvik, Seco, Kennametal, Iscar)

Match by WCMT 050308 (size + radius) in each brand’s indexable drilling portfolio; confirm the exact chipbreaker/edge geometry vs “FN” before ordering.

Recommended Cutting Data / Application

• Primary use: indexable drilling (U-drills), especially steel/stainless/cast iron

• Vc: 80–180 m/min (lower end for stainless/cast iron; upper end for steels)

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