Kennametal DCMT11T304MF KCM25 55° Rhombus Positive Rake PVD Coated Carbide Turning Insert with 0.4mm Finishing Nose Radius for CNC Turning

DCMT11T304MF KCM25 is authentic American Kennametal DCMT series positive rake 55° rhombus PVD coated carbide turning insert, professionally developed for universal medium stock removal turning and precision finishing of carbon steel, alloy structural steel, austenitic stainless steel and grey cast iron workpieces. Equipped with optimized MF multi-function medium feed chipbreaker and balanced 0.4mm finishing nose radius, each single-sided diamond insert provides two independent usable cutting edges to lower workshop cutting tool operating cost. Adopting grade KCM25 anti-wear AlTiN PVD coated ultra-fine grain carbide substrate, it perfectly matches SDJCR/SDJCL series positive rake lever lock turning tool holders. The large positive rake geometry drastically reduces cutting resistance and thin-wall workpiece elastic deformation, suitable for smooth continuous precision turning and mild interrupted processing of scaled forged and cast blanks. Widely applied on standard CNC lathes and Swiss sliding head automatic lathes for automotive shaft hardware, hydraulic valve sleeves, miniature fasteners and general precision component mass turning production.

• Unique 55° rhombus positive rake geometry, superior accessibility for narrow deep small-diameter internal boring and complex contour turning, hard to reach for square negative inserts
• Exclusive MF multi-function medium feed chipbreaker with optimized positive rake face, specially designed for mixed steel and stainless steel processing; segmented curved chip pocket breaks long metal chips into short controllable fragments, avoids chip winding and scratch damage to finished surfaces
• KCM25 advanced nano AlTiN multi-layer PVD coating system, outstanding high-temperature wear resistance and self-lubricating characteristic, effectively restrains built-up edge formation when machining sticky stainless steel
• Ultra-fine gradient WC-Co carbide substrate, balanced hardness and impact toughness, prevents cutting edge micro chipping under mild interrupted turning of uneven forged blanks
• Precision ground cutting edge with controlled micro honing treatment, improves workpiece surface finish and meets medium-high dimensional tolerance requirements for sealing surfaces and precision shafts
• Single-sided positive rake insert with two independent usable cutting edges, excellent cost efficiency for continuous mass production lines
• Low cutting force positive rake design, reduces spindle load and machining vibration, ideal for thin-wall stainless steel and alloy steel parts precision turning
• Multi-operation universal capability: supports external OD turning, end face facing and internal ID boring, simplifies general machinery workshop tool varieties and inventory procurement cost

• Mild carbon steel, medium carbon structural steel, low alloy structural steel, 304/316 austenitic stainless steel, P20/S50C pre-hardened mold steel, grey cast iron, ductile iron