MRMN Carbide Parting and Grooving Inserts are precision carbide inserts designed for grooving, radius groove machining, parting-off, and specialized turning applications.
Featuring a rounded cutting-edge geometry, MRMN inserts are particularly suitable for machining radius grooves and profile grooves where a controlled groove radius and stable cutting performance are required.
Manufactured from high-quality tungsten carbide, MRMN inserts offer excellent wear resistance, edge strength, and dimensional stability for CNC machining applications.
Zhuzhou Century Tool supplies MRMN carbide inserts in different sizes, carbide grades, and cutting geometries, with OEM and customized solutions available for industrial customers.
The MRMN series is commonly offered in widths from approximately 2.0 to 5.0 mm, with radius configurations increasing with insert size
| Insert Model | Cutting Width (W) | Radius (R) | Length (L) | Height (H) | Dimension M |
|---|---|---|---|---|---|
| MRMN200 | 2.0 mm | 1.0 mm | 16 mm | 3.5 mm | 1.60 mm |
| MRMN300 | 3.0 mm | 1.5 mm | 21 mm | 4.8 mm | 2.35 mm |
| MRMN400 | 4.0 mm | 2.0 mm | 21 mm | 4.8 mm | 3.30 mm |
| MRMN500 | 5.0 mm | 2.5 mm | 26 mm | 5.8 mm | 4.10 mm |
| Item | Specification |
|---|---|
| Product Type | Carbide Parting & Grooving Insert |
| Insert Series | MRMN |
| Cutting Width | 2.0–5.0 mm |
| Cutting Edge | Radius / Rounded |
| Material | Cemented Tungsten Carbide |
| Application | Grooving / Radius Grooving / Parting |
| Machine | CNC Lathe / Turning Center / Automatic Lathe |
| Chipbreaker | M / G / Customized |
| Carbide Grade | Customized according to material |
| Coating | Uncoated / PVD / CVD |
| Customization | OEM / ODM Available |
This is a useful section for your website because buyers often search for both product families.
| Feature | MRMN | MGMN |
|---|---|---|
| Cutting Edge | Rounded / Radius | Mainly straight cutting edge |
| Main Application | Radius grooving / profile grooves | Parting / narrow grooving |
| Groove Shape | Rounded groove | Straight-bottom groove |
| Typical Radius | R1.0–R2.5+ depending on size | Smaller nose radius |
| Parting | Application-dependent | Primary application |
| Profile Grooving | Excellent | Limited |
| Surface Transition | Smooth radius | Straight profile |
| Typical Use | Radius grooves, special grooves | Cut-off, narrow grooves |
The recommended carbide grade should be selected according to the workpiece material, cutting speed, feed rate, groove depth, machine rigidity, and coolant conditions.
| ISO Material Group | Workpiece Material | Recommended Characteristics | Typical Grade Direction |
|---|---|---|---|
| P | Carbon Steel / Alloy Steel | Wear resistance + edge strength | Coated carbide |
| M | Stainless Steel | Toughness + anti-chipping performance | Tough PVD grade |
| K | Cast Iron | High wear resistance | Wear-resistant grade |
| N | Aluminum / Non-ferrous | Sharp edge + low adhesion | Polished carbide |
| S | Titanium / Superalloys | Toughness + heat resistance | Tough coated grade |
| H | Hardened Steel | High hardness + wear resistance | Specialized grade |
The primary advantage of MRMN inserts is their rounded cutting geometry.
They are suitable for producing:
The radius cutting edge helps produce a smooth transition between the groove bottom and side walls.
MRMN inserts can be used for external groove machining on cylindrical components.
Typical applications include:
With a compatible tool holder and suitable geometry, MRMN inserts can also be used for certain face-grooving applications.
Certain MRMN configurations can also be used for parting applications.
However, if the primary purpose is high-efficiency cutoff, we recommend evaluating a dedicated straight-edge parting insert such as MGMN.
For this reason, your website should position MRMN primarily around:
Radius Grooving + Profile Grooving + Specialized Grooving
rather than making “parting” the only primary application.
MRMN carbide inserts can be configured for a wide range of machining materials.
Suitable carbide grades provide a balance between wear resistance and edge strength for carbon and alloy steels.
A tougher substrate and suitable chipbreaker can help reduce edge chipping and improve chip control.
Wear-resistant grades are preferred because cast iron can generate abrasive cutting conditions.
Sharp and polished cutting edges can help reduce built-up edge and improve groove surface quality.
For titanium, nickel-based alloys and other difficult materials, grade selection and cutting parameters should be optimized according to the application.
Choose the insert according to the required groove width.
For example:
MRMN200 → approximately 2.0 mm
MRMN300 → approximately 3.0 mm
MRMN400 → approximately 4.0 mm
MRMN500 → approximately 5.0 mm
The radius of the insert should match the required groove profile.
Select the grade according to:
Workpiece material → cutting speed → feed → groove depth → machine rigidity
Different chipbreaker geometries can be used for light cutting, general machining, or specific workpiece materials.
Always confirm that the insert matches the intended MRMN-compatible tool holder.
The rounded cutting edge is designed specifically for controlled radius groove machining.
Tungsten carbide provides high hardness and resistance to abrasive wear.
A precision-ground cutting edge helps maintain consistent groove dimensions during production machining.
MRMN inserts are available in several cutting widths and radius configurations.
Custom carbide grades, coatings, geometries, and packaging can be supplied for OEM customers.
Zhuzhou Century Tool provides OEM and ODM carbide insert manufacturing for distributors, tooling companies, and industrial machining customers.
We can customize:
For customized MRMN inserts, customers can provide an existing insert, drawing, tool-holder model, or workpiece application information.
MRMN carbide inserts are radius-type grooving inserts designed primarily for radius grooves, profile grooves, and specialized turning applications.
MRMN inserts are mainly used for radius grooving, external grooving, profile grooving, and certain parting applications.
MRMN has a rounded/radius cutting edge, while MGMN is primarily designed with a straighter cutting edge for conventional parting and narrow grooving.
Yes. A suitable carbide grade and chipbreaker can be selected for stainless steel machining.
Yes. Coated and uncoated carbide options can be supplied depending on the machining application.
Yes. Zhuzhou Century Tool supports OEM/ODM custom carbide inserts according to drawings, samples, and application requirements.
Some MRMN configurations can be used for parting, but MRMN is particularly advantageous for radius and profile grooving. Dedicated MGMN-style inserts may be more suitable for conventional cutoff operations.
Please provide the insert model, groove width, radius, workpiece material, tool-holder model, machining parameters, required quantity, and drawing or sample if available.
