Tungaloy TB, TP & TC 60° Triangle Positive Inserts

Low Cutting Resistance | High Precision Finishing | Ultimate Boring Stability

Which 60° triangular positive insert is best for vibration-free internal boring?

The Tungaloy TB, TP, and TC Series are 60° triangular positive inserts engineered for applications where minimizing cutting force is critical. Unlike negative inserts, these positive geometries (typically 5°, 7°, or 11° relief) reduce tool pressure, making them the industry standard for internal boring, small-diameter turning, and thin-walled workpiece machining. Whether you select the screw-down TCMT, the precision-ground TPGT, or the specialized TBGT, you benefit from Tungaloy's world-class AH725 PVD coating for stainless steel or NS530 Cermet for high-gloss finishing. The 60-degree shape provides excellent clearance, allowing for versatile profiling and finishing in tight CNC lathe setups.

Decoding Tungaloy Positive Triangle Nomenclature

ISO vs. ANSI Reference Table

Compatible Tooling

Tungaloy Grade Selection Tip

The Beyond CNC Advantage

Global Industry Feedback

Technical FAQ

Tech Tip: Boring Overhang

When boring with **TC/TP inserts**, always try to keep the boring bar overhang ratio below 3x Diameter for steel bars. If you must go longer, switch to a Tungaloy Carbide-reinforced bar to maintain precision. **BEYOND CNC** - Machining Excellence.