MH(350) 4 flute carbide square end mill with 0.3–0.4μm ultra-fine carbide and AlCrN PVD coating for high-speed machining of stainless steel, copper, titanium alloys and hardened steel up to 52 HRC.
The MH(350) 4 flute end mill is developed for high-speed milling of stainless steel and other materials where heat, adhesion and cutting-edge wear can affect machining stability.
Its 0.3–0.4μm ultra-fine grain carbide substrate, high-performance AlCrN PVD coating and specially developed tool geometry work together to support stable cutting performance under demanding conditions. The MH(350) is suitable for dry and coolant-assisted machining of stainless steel, copper, titanium alloys and hardened steel up to 52 HRC.
Product Highlights
Stainless Steel Machining
Stainless steel can generate high cutting temperatures and strong material adhesion, making tool selection especially important.
The MH(350) is designed to address these conditions through the combination of an ultra-fine carbide substrate, AlCrN coating and optimized cutting geometry.
Reduced Adhesion
The AlCrN coating provides strong resistance to material adhesion, helping reduce the sticking and built-up edge commonly encountered when milling stainless steel.
Stable High-Speed Cutting
The fine-grain carbide substrate and cutting geometry are designed for high-speed machining where conventional carbide tools may experience accelerated wear.
Dry Cutting Capability
The MH(350) can be used for dry machining as well as coolant-assisted cutting, depending on the workpiece, machine setup and selected cutting parameters.
Applications
Stainless Steel
A primary application for the MH(350), particularly where adhesion, heat generation and built-up edge are concerns.
Copper
Suitable for copper milling where controlled cutting behavior and edge stability are required.
Titanium Alloys
Suitable for demanding titanium machining where heat and tool wear need to be carefully controlled.
Hardened Steel
Suitable for hardened steel up to 52 HRC when used with appropriate cutting conditions.
High-Speed Milling
Designed for machining conditions where higher cutting speeds and thermal stability are important.
Material & Application Guide
| Workpiece | Recommended Use | Key Consideration |
| Stainless Steel | High-speed / Dry / Coolant Milling | Adhesion and built-up edge |
| Copper | General & Precision Milling | Cutting stability |
| Titanium Alloy | High-performance Milling | Heat and tool wear |
| Hardened Steel ≤52 HRC | Controlled Milling | Hardness and cutting load |
Actual tool performance depends on workpiece grade, hardness, tool diameter, machine rigidity, tool overhang, engagement and cutting conditions.
Why the MH(350) Performs Differently
0.3–0.4μm Ultra-Fine Carbide
The ultra-fine grain structure provides a dense carbide substrate with high hardness and wear resistance, supporting stable edge performance in demanding machining applications.
AlCrN PVD Coating
The AlCrN coating is selected for its high-temperature oxidation resistance and hot-hardness characteristics, making it suitable for applications where cutting temperatures can become a limiting factor.
Purpose-Designed Geometry
The MH(350) uses a dedicated tool geometry rather than a simple general-purpose 4-flute configuration, supporting the high-speed machining performance required for demanding materials.
Anti-Adhesion Cutting Performance
Reducing material adhesion is particularly important when machining stainless steel. The MH(350) is designed to help control sticking and built-up edge at the cutting edge.
Technical Specifications
| Parameter | Specification |
| Series | MH(350) |
| Tool Type | 4 Flute Carbide Square End Mill |
| Flute Count | 4 |
| End Type | Square |
| Carbide Substrate | 0.3–0.4μm Ultra-Fine Grain Carbide |
| Coating | AlCrN PVD |
| Cutting Capability | High-Speed / Dry / Coolant-Assisted |
| Hardened Steel | Up to 52 HRC |
| Recommended Materials | Stainless Steel, Copper, Titanium Alloy, Hardened Steel |
Available Dimensions
Select the appropriate configuration according to workpiece geometry and machining conditions.
Key dimensions include:
Cutting Conditions
The MH(350) is designed for high-speed machining, but recommended cutting data should be matched to the actual tool diameter and workpiece.
Cutting recommendations can be provided for:
For stainless steel, titanium, copper and hardened steel, parameters should be selected according to the material grade, hardness, machine rigidity and machining method.
Tool Selection
For Stainless Steel
Prioritize the appropriate tool diameter and cutting engagement while controlling heat and material adhesion.
For Titanium Alloys
Consider machine rigidity, tool engagement and cooling conditions when selecting cutting parameters.
For Copper
Select a tool configuration that matches the required feature size and material removal rate.
For Hardened Steel
Confirm the workpiece hardness before selecting machining parameters. The MH(350) is intended for applications up to 52 HRC.
Custom Carbide End Mills
Standard configurations may not always match a specific machining application.
JimmyTool can provide customized tooling based on your required dimensions and application.
Custom Options
Frequently Asked Questions
What is the MH(350) 4 flute end mill designed for?
The MH(350) is designed for high-speed CNC milling of stainless steel, copper, titanium alloys and hardened steel up to 52 HRC.
Why is the MH(350) suitable for stainless steel?
Its 0.3–0.4μm ultra-fine carbide substrate, AlCrN PVD coating and specialized cutting geometry are designed to improve cutting stability and reduce material adhesion during stainless steel machining.
Can the MH(350) be used for dry milling?
Yes. The MH(350) can be used for dry cutting as well as coolant-assisted machining, depending on the material and machining conditions.
Can the MH(350) machine hardened steel?
Yes. It is suitable for hardened steel applications up to 52 HRC with appropriate cutting parameters.
Can the MH(350) be used for copper?
Yes. Copper is one of the recommended workpiece materials for this tool.
Is the MH(350) suitable for titanium?
Yes. The tool can be used for titanium alloy machining under suitable cutting conditions.
What is the advantage of the 0.3–0.4μm carbide substrate?
The ultra-fine grain carbide provides high hardness and wear resistance, helping maintain cutting-edge stability during demanding machining.
Can JimmyTool customize the MH(350)?
Yes. JimmyTool can provide customized diameters, lengths, shank sizes, geometries and coating options according to your requirements.
