Core Specifications & Design Advantages

1. VNMG160404 Geometry: Access & Precision for Complex Turning

• Key Dimensional Traits:
  • 16: 16mm inscribed circle (IC), compatible with VNMG tool holders (e.g., VCLNR2020K16, VCLNL2525K16) for mid-to-large CNC lathes (Haas ST-30, Fanuc 0i-TD). Balances structural rigidity (handles depth of cut up to 4mm in steel) with the ability to fit tight spaces—critical for machining narrow internal grooves (width ≥0.8mm) or small shoulders (e.g., 3mm-wide steps on gear shafts).
  • 04 (Thickness): 4.76mm thickness, minimizing micro-vibration during high-precision cuts. Prevents dimensional errors in thin-walled parts (e.g., 1.5-3mm steel sensor housings) or small-diameter shafts (10-20mm) that can’t withstand deflection.
  • 04 (Nose Radius): 0.4mm fine nose radius—the defining feature for precision: enables ultra-smooth finishes (Ra ≤0.8μm) on assembly-critical surfaces (e.g., hydraulic valve sealing faces) and machines small radii (≥0.4mm) in tight corners, avoiding the need for secondary polishing.
• 35° Diamond Positive-Rake Design: Sharp, narrow diamond angle grants access to workpiece features that larger inserts (e.g., triangular TNMG) can’t reach—perfect for undercuts, narrow grooves, or stepped shafts with tight shoulder angles (≤35°). The positive rake angle reduces cutting force by 25% vs. negative rake inserts, eliminating "micro-burring" on small features and preventing deformation of delicate steel parts.

2. MA Chipbreaker: Optimized for Precision Chip Control

• Anti-Clog & Anti-Wrapping: Shallow, contoured chip pockets split ferrous chips into small, uniform fragments. Prevents chips from wrapping around narrow shafts (e.g., 12mm sensor shafts) or clogging narrow grooves (e.g., 1mm-wide O-ring seats), which causes surface scratches or tool damage.
• Low-Friction Evacuation: Polished, angled chip channels guide chips away from the cutting zone, avoiding re-cutting (a major cause of poor finish quality on precision surfaces like gear blank faces). Protects delicate features (e.g., 0.5mm-wide snap-ring grooves) from chip impact.
• Dual-Use Efficiency: Works seamlessly for semi-roughing (trimming residual material from complex blanks) and finishing (refining surfaces to Ra ≤0.8μm). Eliminates the need to switch inserts mid-project, cutting setup time by 30% and reducing tool inventory for multi-step turning.

3. US735 Grade: Durability for Precision Ferrous Machining

• Micro-Grain Hardness: 0.6-0.8μm grain size (HV≥1750) resists abrasive wear from cast iron (HT200-HT350) and hardened alloy steel (up to HRC 35). Extends insert life by 40% vs. standard grades, maintaining sharpness for 1400+ finishing cycles or 1200+ semi-roughing cycles on mild steel (1018).
• Chipping Resistance: Balanced toughness prevents edge damage when machining interrupted features (e.g., grooves with keyways) or uneven cast iron surfaces. Avoids "edge rounding"—a flaw that ruins small-radius accuracy—and eliminates costly tool changes mid-batch.
• Heat Management: Withstands temperatures up to 800°C (generated in high-speed precision turning, 150-220 m/min for steel) without edge softening. Maintains tight tolerance control (±0.003mm) for complex parts like hydraulic valves, even during long production runs.

Performance & Compatibility

• Ideal Applications:
  • Turning complex steel/alloy parts: hydraulic valves, stepped gear shafts, sensor bodies, and machinery components with narrow grooves or tight corners.
  • Finishing precision features: sealing faces, bearing seats, and micro-grooves requiring Ra ≤0.8μm surfaces and ±0.005mm tolerances.
  • Semi-roughing cast iron parts with pre-formed complex features (e.g., pump housings with internal galleries) without damaging delicate sections.
• Tool Holder Fit: Works with all standard VNMG-series tool holders designed for 16mm IC inserts (e.g., VCLNR2020K16, VCLNL2525K16)—no custom adapters needed, simplifying CNC lathe setup.
• Coolant Synergy: Pair with high-pressure water-soluble coolants (directed via tool holder nozzles) to enhance chip evacuation from narrow grooves and extend US735 life. For hardened alloy steel (HRC 30+), use cutting oil to reduce thermal stress and protect the sharp cutting edge.

Practicality & Quality Assurance

• Protective Packaging: Each insert is packed in an anti-scratch plastic tray to preserve the 0.4mm nose radius, MA chipbreaker, and US735 surface—minor damage here renders the insert useless for precision complex turning.
• Clear Identification: Laser-marked with "VNMG160404-MA US735" for quick selection, preventing mix-ups with larger-radius (0.8mm) VNMG inserts or non-ferrous-specific tools in busy workshops.
• Precision Testing: Every insert undergoes laser dimensional inspection (±0.002mm tolerance on IC, thickness, and nose radius) and edge integrity checks, ensuring uniform performance across complex part production—critical for meeting industrial quality standards (e.g., ISO 9693).