MH(350) 2 flute micro carbide square end mill with 0.3–0.4μm ultra-fine carbide and AlCrN PVD coating, designed for high-speed precision milling of stainless steel, copper, titanium alloys and hardened steel up to 52 HRC.
The MH(350) 2 flute micro end mill is designed for precision milling where a small cutting diameter, controlled cutting load and stable edge performance are required.
Built from 0.3–0.4μm ultra-fine grain carbide and finished with an AlCrN PVD coating, it combines a wear-resistant substrate with strong thermal and anti-adhesion properties. The tool is suitable for stainless steel, copper, titanium alloys and hardened steel up to 52 HRC, with support for high-speed, dry and coolant-assisted machining.
Product Highlights
Precision Micro Milling Applications
The MH(350) is intended for machining applications where tool diameter and cutting stability are critical.
Stainless Steel Micro Milling
Stainless steel can produce adhesion and built-up edge, particularly with small-diameter tools. The MH(350) combines ultra-fine carbide with AlCrN coating to help maintain a stable cutting edge.
Small Features and Fine Details
The 2-flute micro configuration is suited to narrow features, small pockets, fine profiles and other precision machining areas where larger end mills cannot provide the required access.
Titanium Alloy Micro Machining
The tool is suitable for small-feature machining in titanium alloys and other materials where heat generation and tool wear can limit tool performance.
Copper Machining
Suitable for precision copper milling where controlled cutting and edge performance are important.
Hardened Steel
The MH(350) can be applied to hardened steel up to 52 HRC when the tool diameter, machine setup and cutting conditions are properly matched.
Why 2 Flutes for Micro Milling?
Greater Flute Space
A 2-flute configuration provides more open flute space around the cutting area, which can support chip evacuation in small-diameter machining.
Suitable for Small Diameters
The 2-flute geometry is well suited to micro end mills where chip removal and cutting load need to be carefully controlled.
Controlled Cutting Load
Fewer cutting edges can help manage cutting engagement in small-feature machining, particularly when the machine setup and tool diameter are properly matched.
Ultra-Fine Carbide for Small-Diameter Cutting
The 0.3–0.4μm ultra-fine grain carbide substrate is one of the defining characteristics of the MH(350).
Its fine grain structure is intended to provide:
For micro end mills, substrate quality becomes particularly important because the smaller cutting geometry leaves less margin for edge damage and wear.
AlCrN Coating for Demanding Materials
The AlCrN PVD coating is designed for applications involving elevated cutting temperatures and material adhesion.
Thermal Stability
The coating provides high-temperature oxidation resistance for demanding machining conditions.
Anti-Adhesion Performance
The coating helps reduce material adhesion when cutting stainless steel, where built-up edge can affect tool life and surface quality.
High-Speed Application
The substrate and coating combination is designed to support high-speed machining when machine rigidity and cutting parameters are appropriate.
Material Compatibility
| Workpiece Material | Application Focus |
| Stainless Steel | Micro milling, fine features, precision profiling |
| Copper | Precision milling and small features |
| Titanium Alloy | Difficult-material micro machining |
| Hardened Steel ≤52 HRC | Precision machining under suitable conditions |
| Other Difficult Materials | Application dependent |
Final tool selection should consider material grade, hardness, tool diameter, machine rigidity, tool overhang and cutting conditions.
Technical Specifications
| Parameter | Specification |
| Series | MH(350) |
| Tool Type | 2 Flute Micro Carbide Square End Mill |
| Flute Count | 2 |
| End Type | Square |
| Carbide Substrate | 0.3–0.4μm Ultra-Fine Grain Carbide |
| Coating | AlCrN PVD |
| Hardened Steel | Up to 52 HRC |
| Machining Modes | High-Speed / Dry / Coolant-Assisted |
| Recommended Materials | Stainless Steel, Copper, Titanium Alloy, Hardened Steel |
Size Selection
For micro end mills, the cutting diameter should be selected according to feature size, required depth and available machine rigidity.
Important dimensions include:
Micro End Mill Selection Guide
Match the Diameter to the Feature
Use the smallest practical diameter that can safely withstand the cutting load. Smaller is not always better when tool rigidity is limited.
Check the Machining Depth
Choose the flute length and overall tool dimensions according to the feature depth and required tool reach.
Consider Machine Rigidity
Micro tools are sensitive to spindle runout, vibration and tool overhang. A rigid machine and accurate toolholding setup are important for stable machining.
Match the Tool to the Material
For stainless steel, titanium, copper and hardened steel, cutting parameters should be adapted to the specific material and tool diameter.
Cutting Conditions
Micro end mills require carefully controlled cutting conditions because small changes in engagement, runout or tool overhang can significantly affect tool performance.
Recommended cutting data can include:
JimmyTool can provide starting parameters based on the tool diameter, workpiece material, hardness and machining method.
Custom Micro End Mills
Need a specific diameter, flute length or geometry?
JimmyTool can manufacture customized micro carbide end mills for application-specific requirements.
Custom Options
Frequently Asked Questions
What is the MH(350) 2 flute micro end mill used for?
The MH(350) is designed for small-feature and precision milling of stainless steel, copper, titanium alloys and hardened steel up to 52 HRC.
Why use a 2 flute design for micro machining?
Two flutes provide greater flute space around the cutting zone, which can support chip evacuation and controlled cutting in small-diameter applications.
Is the MH(350) suitable for stainless steel?
Yes. Stainless steel is a key application, particularly where material adhesion and built-up edge can affect machining performance.
Can the MH(350) be used for titanium alloys?
Yes. The MH(350) is suitable for titanium alloy machining under appropriate cutting conditions.
Can it machine copper?
Yes. The tool can be used for copper milling and other non-ferrous precision applications.
Can the MH(350) machine hardened steel?
Yes. It is suitable for hardened steel up to 52 HRC when used with suitable cutting parameters.
Can it be used for dry machining?
Yes. The MH(350) can be used for dry cutting as well as coolant-assisted machining depending on the workpiece and machining setup.
Can JimmyTool customize the tool?
Yes. Custom diameters, lengths, shank sizes, geometries and coating options can be produced according to the application requirements.
