A Triangular CNC Blade (triangular insert) is a hard metal cutting tip, typically made of tungsten carbide, cermet, ceramic, or coated carbide, designed to be mounted on a tool holder.
Each corner of the triangle can serve as a cutting edge, so when one edge wears out, the insert can be rotated to use another corner — extending tool life.
Structure & Features
| Feature | Description |
|---|
| Shape | Equilateral triangle with 3 usable corners (each 60° cutting edge). |
| Material | Usually tungsten carbide, cermet, or ceramic, often with coatings
like TiN, TiAlN, AlTiSiN, or CVD/PVD layers. |
| Mounting | Clamped into a tool holder using a center hole and screw. |
| Edges | Each corner acts as a separate cutting edge; 3 edges total. |
| Angle | Commonly a 60° included angle at each corner. |
| Chipbreaker | Designed groove on top to break chips efficiently. |
| Coating | Provides wear resistance and heat protection during cutting. |
Common Codes (ISO Designations)
Examples of triangular CNC insert codes include:
| Example Code | Meaning |
|---|
| TPMT110304 | Triangular Positive insert, 11 mm size, 0.4 mm corner radius. |
| TNMG160404 | Triangular Negative insert, 16 mm size, 0.4 mm corner radius. |
| TCMT090204 | Triangular, Chipbreaker geometry, smaller size. |
Each letter/number in the code defines shape, clearance angle, tolerance, size, and radius according to ISO standards.
5. Applications
✅ Turning – external and internal machining on CNC lathes
✅ Facing – flattening surfaces
✅ Boring – enlarging internal holes
✅ Chamfering – creating beveled edges
✅ Finishing – achieving smooth surface quality
6. Advantages
3 usable edges → cost-effective
Easy to replace, no sharpening needed
High precision for CNC machining
Suitable for steels, stainless steel, cast iron, and alloys
Available in many coatings and chipbreaker styles
FAQ
1.Are you factory or trading company?
Yes, we have factory. We are professional manufacturerwith 20
yearsof production experience. Besides, we also do some trading.
2. ls free shipping possible?
We don’t offer free shipping service, but we will give you some
discountif you buy large qty products.
3.Can you send products to our Forwarder in China?
Yes, if you have forwarder in China, l will glad to send products
to him/her.
4.Do you make OEM?
Yes, we do. We have laser machine, can laser your logo and sizes on
thebody of milling cutter, also can print labels.
5.How about the delivery time?
According to the sizes and quantity, delivery time is different.
Usually3~7days. We can tell you exact inventory state if you need.
