Efficient, stable and durable: A comprehensive analysis of the advantages of R390-11T308M-PM milling inserts

In modern CNC machining, operators must carefully select cutting tools—specifically milling cutters and milling tool inserts—to directly enhance production efficiency,

improve workpiece quality, and reduce machining costs. These tools dictate cutting precision, maximize material removal speed, and extend process durability.

The R390-11T308M-PM milling insert is one of the preferred choices for many machining companies in their pursuit of “high cost performance + high efficiency”.

What is the R390-11T308M-PM milling insert?

R390-11T308M-PM is an indexable carbide milling insert, which is widely used in face milling, shoulder milling, profile milling and other processes in the metal processing industry.

It adopts the insert size of the international standard R390 series, is compatible with a variety of tool brands, and is very suitable for high-speed and high-precision machining needs.

insert structure design highlights

First, it adopts the “PM” type chip breaker design, which has good chip evacuation ability and is particularly suitable for the processing of steel, stainless steel and medium-hard alloy materials.

Second, the geometric design of the insert ensures stable cutting force, reduces vibration and improves the surface finish of the machined surface. It can maintain excellent stability even under harsh working conditions (such as high feed or intermittent cutting).

Carbide material + high hardness coating

The base of the R390-11T308M-PM insert is a high-strength cemented carbide (tungsten carbide + cobalt binder).

Its Vickers hardness (HV) is usually above 1800 HV, which is equivalent to a compressive strength of about 70 HRC.

This means that it can resist wear for a long time and is not easy to break.

At the same time, the surface of the insert is usually equipped with TiAlN or CVD coating, which greatly improves its resistance to high temperature and oxidation, making it stable and reliable in dry cutting or high-speed processing.

Milling insert R390 applicable scenarios:

Mold industry: rough milling/finishing milling of medium-hardness steel molds such as P20, 718, and NAK80

Mechanical parts processing: bracket, housing, and flange milling

Equipment manufacturing: precision contour milling of automation equipment parts

Stainless steel processing: good chip removal performance for austenitic stainless steels such as 304, 316, and 321

If you are looking for a high-efficiency, low-vibration, and durable general milling insert, R390-11T308M-PM is undoubtedly a trustworthy choice. It is not only highly adaptable and stable in performance, but also can effectively control processing costs.