Description
CARBIDE TURNING INSERTS DNMM
DNMM carbide turning inserts are single-sided, negative-geometry inserts featuring a 60° diamond (rhomboid) shape with a 0° relief (clearance) angle. They are primarily designed for heavy-duty roughing and general turning operations, offering high stability, toughness, and resistance to mechanical stress.
Made from cemented carbide (WC-Co) and typically PVD or CVD coated (TiN, TiCN, Al₂O₃, or TiAlN, depending on grade), DNMM inserts are ideal for aggressive cuts on steel, stainless steel, and cast iron, while maintaining reliable performance in demanding machining conditions.
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Key Features
• Shape: 60° diamond (rhomboid)
• Relief Angle: 0° (negative geometry)
• Cutting Edges: Single-sided – 2 cutting edges per insert
• Mounting Type: Clamp or screw-on (ISO standard 60° toolholder pockets)
• Coatings: CVD or PVD – TiN, TiCN, Al₂O₃, TiAlN (depending on grade)
• Application Type: Heavy roughing, general turning, and semi-finishing under less demanding conditions
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Materials & Applications
DNMM carbide inserts are used for operations requiring high edge strength, vibration resistance, and toughness, making them suitable for deep cuts and heavy material removal.
Typical Workpiece Materials:
• Steel (carbon and alloy) — heavy cuts, roughing, and general turning
• Stainless Steel — suitable grades and coatings minimize built-up edge (BUE) and heat
• Cast Iron (gray and ductile) — excellent stability and performance with appropriate chipbreakers
• Titanium & Superalloys — usable for light finishing, considering high temperature and wear limitations
Common Operations:
• Heavy roughing (deep cuts)
• General turning of steel, stainless, and cast iron
• Semi-finishing where rough cuts are required
• Applications demanding high insert stability and resistance to vibrations
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Advantages & Performance
• High Strength & Stability: Negative geometry and thicker insert body withstand aggressive cuts and vibrations
• Durability: Modern carbide substrates and coatings ensure wear and heat resistance
• Versatility: Multiple chipbreaker options and grades adapt to different materials and cutting conditions
• Cost-Efficiency: Long tool life under heavy-duty machining conditions justifies investment in coated DNMM inserts
• Reliability in Tough Conditions: Ideal for roughing or challenging workpieces where insert strength is critical
