Description
CARBIDE TURNING INSERTS DNMA
DNMA carbide turning inserts are single-sided, positive-geometry inserts featuring a 60° diamond (rhomboid) shape with a 7° relief (clearance) angle. They are designed primarily for finishing, semi-finishing, and light turning operations, providing excellent edge sharpness, chip control, and surface finish.
Made from cemented carbide (WC-Co) and often PVD-coated (TiN, TiAlN, TiCN, or AlTiN), DNMA inserts offer a combination of precision, wear resistance, and low cutting forces, suitable for a variety of materials including steel, stainless steel, cast iron, and non-ferrous alloys.
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Key Features
• Shape: 60° diamond (rhomboid)
• Relief Angle: 7° (positive geometry)
• Cutting Edges: Single-sided – 2 cutting edges per insert
• Mounting Type: Clamp or screw-on (ISO standard holders with 60° pockets)
• Coatings: PVD – TiN, TiAlN, TiCN, AlTiN (depending on grade)
• Application Type: Finishing, semi-finishing, and light turning
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Materials & Applications
DNMA carbide inserts are used where precision, low cutting forces, and smooth surface finish are required. Their positive geometry and sharp edges make them especially suitable for delicate or small components.
Typical Workpiece Materials:
• Steel (carbon and alloy) — finishing and semi-finishing with consistent results
• Stainless Steel — PVD-coated versions resist heat and built-up edge
• Cast Iron — fine finishing operations with stable tool engagement
• Non-Ferrous Metals (Aluminum, Copper, Brass) — uncoated or polished-edge grades give smooth cuts
Common Operations:
• Precision finishing and semi-finishing
• Profiling and contour turning
• Low-force light turning
• Internal and external turning requiring fine surface finish
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Advantages & Performance
• Excellent Surface Finish: Sharp positive cutting edge and optimized chipbreaker design ensure smooth, high-quality surfaces
• Low Cutting Forces: Positive geometry reduces energy consumption and cutting heat
• Edge Stability: Micro-grain carbide substrate provides wear resistance even in demanding finishing conditions
• Versatility: Compatible with multiple materials and standard ISO holders
• Durable and Reliable: PVD coatings extend tool life and maintain performance under moderate speeds
