TNMA carbide inserts are triangular, negative rake turning inserts without a chip breaker. Known for their strength, durability, and wear resistance, they are widely used in heavy-duty turning operations on CNC lathes and manual machines. The designation TNMA stands for:

• T – Triangular shape (3 cutting edges per side, 6 total).

• N – 0° relief angle (negative rake insert).

• M – Tolerance class “M” (medium tolerance).

• A – Hole without chipbreaker.

These inserts are especially suited for roughing operations where tool strength is more important than surface finish.

Applications of TNMA Carbide Inserts

TNMA inserts are highly versatile and used across industries such as automotive, aerospace, oil & gas, and heavy machinery manufacturing. Common applications include:

• General Turning – Suitable for external and internal turning of steels, stainless steels, cast iron, and superalloys.

• Heavy-Duty Roughing – Excellent for removing large amounts of material.

• Interrupted Cuts – Their strong cutting edge handles interrupted machining with stability.

• High Wear Resistance – Ideal for long tool life in abrasive materials.

• Cost Efficiency – 6 usable edges reduce tooling costs significantly.

Types of TNMA Carbide Inserts

At CNC Tools Depot, we offer TNMA inserts in multiple grades, coatings, and geometries to match different machining needs. Some popular variations include:

1. Uncoated TNMA Inserts – Best for non-ferrous materials, light-duty applications, and cost-effective machining.

2. CVD Coated TNMA Inserts – Provide excellent wear resistance, ideal for high-speed turning of steels and cast iron.

3. PVD Coated TNMA Inserts – Suitable for stainless steels, alloys, and difficult-to-machine materials.

4. TNMA for Cast Iron – Special grades optimized for grey cast iron and nodular cast iron.

5. TNMA for Hardened Steel – Advanced grades for machining up to 55-60 HRC.

6. TNMA for Superalloys – Heat-resistant grades for aerospace and turbine components.

Why Buy TNMA Inserts from CNC Tools Depot?

• World’s largest marketplace for carbide inserts.

• Wide selection from Korloy, Kennametal, Widia, Taegutec, Iscar, Sandvik and more.

• Competitive prices with bulk discounts.

• Global shipping and fast delivery.

• Authentic, ISO-certified products only.