| Item | Specification |
|---|---|
| Product Name | Carbide Boring Inserts / Internal Turning Inserts |
| Material | Tungsten Carbide / Cemented Carbide |
| Coating | PVD / CVD / Uncoated |
| Machining Type | Rough Boring / Finish Boring |
| Corner Radius | R0.2, R0.4, R0.8, R1.0 etc. |
| Edge Style | Positive / Negative rake |
| Hand | Right-hand / Left-hand / Neutral |
| Package | 10 pcs per plastic box |
| MOQ | 10 pcs |
Different insert shapes are designed for different internal machining requirements.
| Insert Shape | Typical Application | Main Advantage |
|---|---|---|
| CCMT | Internal turning / finishing | Sharp positive cutting edge |
| DCMT | Precision boring | Good accessibility |
| TCMT | General internal turning | Versatile geometry |
| VCMT | Small-diameter boring | Excellent profile accessibility |
| TPMT | General boring | Multi-purpose application |
| WNMG | Heavy internal turning | Strong cutting edge |
| CNMG | Heavy-duty boring | High edge strength |
For small-diameter holes and precision internal machining, CCMT, DCMT, TCMT, and VCMT are commonly selected because their positive geometries can provide good cutting performance in restricted internal spaces.
For internal boring, grade selection should consider:
Workpiece material + cutting speed + feed rate + boring depth + hole diameter + machine rigidity
A harder grade is not always better. Internal boring is particularly sensitive to vibration and tool deflection, so edge toughness and cutting stability are also important.
Carbide boring inserts are primarily used for enlarging and finishing existing holes.
Typical applications include:
With suitable insert geometry, boring inserts can machine:
Positive insert geometries are particularly useful when the boring bar needs to enter a small or deep hole.
Sharp cutting edges and small nose radii can be used for precision internal finishing.
Applications may require:
Choosing the right boring insert requires more than selecting the insert shape.
The hole diameter determines the maximum boring-bar diameter and insert accessibility.
For small holes, choose a smaller insert and a suitable small-diameter boring bar.
The deeper the hole, the more important tool rigidity becomes.
Long boring bars can generate:
Select the carbide grade and chipbreaker according to the material being machined.
A larger nose radius generally provides greater edge strength, while a smaller radius can reduce cutting force and improve accessibility.
Positive geometries are often preferred for small-diameter or deep-hole boring because they can reduce cutting resistance.
Always ensure that the insert is compatible with the boring bar and clamping system.
For rough boring, choose a stronger cutting edge and tougher carbide grade.
Main priorities:
A balanced geometry can provide both cutting stability and surface quality.
For finishing applications, prioritize:
| Feature | Carbide Boring Inserts | HSS Boring Tools |
|---|---|---|
| Hardness | High | Lower |
| Wear Resistance | Excellent | Moderate |
| Cutting Speed | Higher | Lower |
| Tool Life | Generally longer | Generally shorter |
| Replaceable Edge | Yes | Usually no |
| CNC Production | Excellent | Limited |
| Precision Production | Excellent | Moderate |
| OEM Insert Customization | Available | Less common |
For modern CNC production, carbide inserts offer advantages in cutting speed, repeatability, and replaceable cutting edges.
Zhuzhou Century Tool provides OEM and ODM manufacturing for carbide boring inserts and customized internal turning inserts.
We can customize:
Customers can provide a drawing, existing insert, boring-bar model, or application requirements for evaluation.
Zhuzhou Century Tool provides tungsten carbide cutting tools, carbide inserts, wear parts, carbide rods, and customized carbide solutions for industrial customers.
For boring inserts, we can help customers evaluate not only the insert itself, but also the complete machining condition:
This application-based approach helps customers select a more suitable carbide boring insert and internal turning solution.
Carbide boring inserts are replaceable cutting inserts used for machining and finishing internal holes on CNC lathes and turning centers.
They are used for internal turning, hole enlargement, internal profiling, counterboring, chamfering, and precision bore finishing.
Positive inserts such as CCMT, DCMT, TCMT, and VCMT are commonly suitable for small-diameter internal turning because of their cutting accessibility and relatively low cutting forces.
Yes. A suitable tough carbide grade and chipbreaker should be selected for stainless steel to reduce edge chipping and improve chip control.
Drilling creates a new hole, while boring enlarges, corrects, or finishes an existing hole.
The main factors include hole diameter, boring depth, workpiece material, insert geometry, nose radius, carbide grade, and machine rigidity.
Yes. Zhuzhou Century Tool supports OEM and ODM production based on customer drawings, samples, and application requirements.
Yes. Coated and uncoated carbide boring inserts can be supplied depending on the workpiece material and machining conditions.
Use the largest possible boring-bar diameter, minimize tool overhang, ensure secure clamping, select an appropriate insert geometry, and optimize cutting parameters.
Please provide the insert model, boring-bar model, hole diameter, boring depth, workpiece material, machining parameters, required quantity, and drawing or sample if available.
