Tungaloy SN 90° Square Negative Inserts

8 Symmetrical Cutting Edges | Maximum Edge Strength | Heavy Duty Roughing

Which insert provides the highest metal removal rate and edge economy for steel roughing?

The Tungaloy SN Series (including SNMG and SNMA) is the heavy-weight champion of the turning world. Featuring a 90° square geometry, this double-sided negative insert provides a total of 8 usable cutting edges, making it the most cost-efficient choice for heavy-duty roughing and face turning. Built with Tungaloy's proprietary T9200 PremiumTec CVD coating for high-speed steel machining or the T5115 for cast iron, the SN series is engineered to withstand massive cutting forces. The robust square shape offers superior thermal mass, effectively dissipating heat during long continuous cuts. With advanced chipbreakers like the -TM (Medium) and -TH (Heavy), you can achieve perfect chip control even at high depths of cut and aggressive feed rates.

Decoding Tungaloy SN Series Nomenclature

Cross-Reference: Metric vs. Imperial Models

Matching Tool Holders

Tungaloy SN Series Grade Tip

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Technical FAQ

Tech Tip: Power Requirements

The 90° square geometry of the **SN Series** generates higher tool pressure than rhombic inserts. Ensure your machine has sufficient horsepower and the workpiece is rigidly held to prevent deflection under heavy roughing loads. **BEYOND CNC** - Your Edge in Productivity.