R390 high-feed milling cutter series

R390-11T308M-PM Carbide Milling Insert – High-Performance Solution for Precision Machining

Introduction

In the field of modern CNC machining, carbide milling inserts play a vital role in ensuring productivity, accuracy, and cost efficiency. Among them, the R390-11T308M-PM carbide insert stands out as a high-performance choice for shoulder milling, slotting, and contouring applications.

As a professional hard alloy (tungsten carbide) manufacturer, we provide carbide inserts designed for extreme durability, excellent chip control, and superior cutting performance. The R390-11T308M-PM insert is developed for industries requiring consistent surface finish, long tool life, and high reliability in demanding conditions.

1. Code Breakdown: Understanding R390-11T308M-PM

Each part of the product code provides detailed information about geometry, size, and intended usage:

R390 – Insert series: A 90° shoulder milling insert series, optimized for precise right-angle machining.

11 – Insert size: 11 mm cutting edge length, suitable for medium to heavy milling operations.

T3 – Thickness & shape: T stands for triangular geometry, 3 mm thickness, combining edge strength with cutting sharpness.

08 – Cutting edge length/geometry: Edge length 8 mm, designed for stable medium-depth cutting.

M – Tolerance class: Medium precision, balancing dimensional accuracy with cost efficiency.

PM – Chipbreaker type:

P = Steel machining application focus.

M = Medium machining conditions.

Together, PM refers to a universal medium chipbreaker, delivering excellent chip control across steels and stainless steels.

This breakdown indicates that the R390-11T308M-PM is a versatile shoulder milling insert engineered for high-precision, medium-duty cutting operations.

 

 

 

2. Advantages of R390-11T308M-PM Carbide Inserts

The R390-11T308M-PM carbide insert provides multiple advantages compared to conventional inserts:

Superior Cutting Performance

Designed for 90° shoulder milling, producing high-quality walls and floor finishes.

Excellent dimensional accuracy for precise part manufacturing.

Efficient Chip Control

PM chipbreaker ensures reliable chip evacuation in steel and stainless steel.

Reduces tool wear, vibration, and machine downtime.

High Wear Resistance

Tungsten carbide substrate resists abrasion, thermal cracking, and edge chipping.

Ideal for high-speed cutting with long tool life.

Cost Efficiency

Multi-edge design maximizes tool utilization.

Reduces tooling cost per component by extending usable life.

Versatility

Applicable for roughing, semi-finishing, and finishing operations.

Works effectively on steel, stainless steel, and cast iron.

3. Performance Analysis

The R390-11T308M-PM insert is engineered for high performance under demanding machining conditions:

Material Substrate: Ultrafine-grain carbide enhances both hardness and toughness.

Coating Technology: PVD or CVD coatings (TiAlN, AlTiN, TiCN) improve heat resistance and oxidation stability.

Geometry: Optimized for 90° shoulder milling, ensuring precise wall and floor finish.

Chipbreaker (PM): Reliable performance in medium cutting depths with smooth chip evacuation.

Feed Rate & Cutting Speed: Supports high feed rates while minimizing cutting force.

4. Application Scenarios

The R390-11T308M-PM carbide milling insert is widely used in various industries:

Automotive Industry

Machining engine components, transmission housings, and brake parts.

Aerospace Industry

Suitable for stainless steel and alloy steel components requiring precise surface quality.

Mold & Die Industry

Effective in cavity milling, slotting, and precision contouring.

General Engineering

Suitable for medium-depth slotting, facing, and profiling operations.

Energy & Power Generation

Used in machining turbines, housings, and heavy cast iron parts.

5. Key Features and Benefits

90° Shoulder Milling Capability (R390 Series) → Ensures accurate right-angle machining.

Medium Chipbreaker (PM) → Excellent balance of cutting forces, chip evacuation, and surface finish.

Tungsten Carbide Substrate → High hardness and fracture toughness.

Coating Options → Available in wear-resistant PVD/CVD coatings for extended tool life.

Optimized Edge Design → Reduces cutting force and improves stability.

Wide Material Compatibility → Works efficiently in steels, stainless steels, and cast irons.

6. Precautions and Best Practices

For optimal performance and safety, follow these guidelines:

Cutting Parameters

Adjust cutting speed and feed rate based on workpiece material.

Avoid overloading in stainless steel machining.

Insert Handling

Handle carefully to avoid chipping edges.

Store inserts in protective packaging.

Clamping Accuracy

Ensure the insert is properly seated in the toolholder.

Clean insert pockets before installation.

Coolant Use

Apply coolant when machining stainless steel or high-temperature alloys.

Dry machining can be used for cast iron.

Tool Indexing

Rotate the insert before edges are fully worn.

Prevents poor surface finish and tool breakage.

7. Technological and Patent Innovations

Our R390-11T308M-PM carbide inserts integrate advanced innovations:

Nano-Grain Carbide Technology – Improves wear resistance and toughness simultaneously.

Advanced Coatings – TiAlN/AlTiN coatings resist oxidation and extend life under high heat.

Chipbreaker Design (PM) – Engineered for medium cutting depths, ensuring consistent chip evacuation.

Precision Edge Preparation – Enhances sharpness and durability, minimizing chipping risk.

OEM/ODM Solutions – Customization available for specific industries and materials.

8. Why Choose Our Carbide Inserts

As a global hard alloy manufacturer, we deliver:

Factory-Direct Supply – Competitive pricing with consistent quality.

Strict Quality Standards – Rigorous inspection and testing before shipment.

Technical Support – Recommendations for cutting parameters and applications.

Global Market Coverage – Trusted supplier in Asia, Africa, South America, and Europe.

Continuous R&D – Dedicated to coating improvements and new chipbreaker geometries.

Conclusion

The R390-11T308M-PM carbide milling insert is a precision-engineered, versatile, and durable solution for modern CNC machining. With its 90° shoulder milling capability, medium chipbreaker geometry, and strong carbide substrate, it guarantees superior surface finish, long tool life, and excellent cost-efficiency.

By choosing our R390-11T308M-PM inserts, manufacturers benefit from enhanced productivity, reduced tooling costs, and stable machining performance, backed by the reliability of a leading carbide insert manufacturer.