The US 4 Flute Stainless Steel Flat End Mill features 0.5 μm fine-grain carbide and an AlCrN PVD coating for stable cutting and wear resistance. Its sharp edge and variable geometry are designed for stainless steel, carbon steel, cast iron, and titanium alloys up to 40 HRC.
The US 4 Flute Stainless Steel Flat End Mill is designed for stable and reliable machining of stainless steel and other common difficult-to-cut materials.
It combines a 0.5 μm carbide substrate with a high-performance AlCrN PVD coating to balance cutting-edge strength, wear resistance, and thermal stability.
The unequal flute spacing and variable helix geometry help reduce vibration during milling.
Its sharp cutting edges provide efficient material removal while the anti-adhesion characteristics help reduce built-up edge when machining stainless steel.
Stainless steel can generate high cutting resistance and tends to adhere to the cutting edge.
The US uses a sharp cutting-edge design to help reduce cutting resistance and maintain a smooth cutting action.
This makes the tool suitable for profiling, side milling, pocketing, and other general stainless steel milling operations.
The US features unequal flute spacing and variable helix angles to help disturb regular cutting-force patterns.
This design can reduce vibration and improve cutting stability compared with conventional uniform flute geometry.
It is particularly useful when machining stainless steel parts where chatter or unstable cutting can affect tool life and surface quality.
The AlCrN PVD coating provides excellent oxidation resistance and hot hardness.
Its high-temperature performance is approximately 1000°C, helping protect the cutting edge under elevated machining temperatures.
The coating also provides strong resistance to adhesion and wear, making it suitable for demanding stainless steel applications.
The US uses a 0.5 μm fine-grain carbide substrate to provide a stable and durable cutting edge.
The substrate is designed to provide the hardness and toughness needed for stainless steel and other difficult-to-machine materials.
The 4-flute flat-end configuration provides four cutting edges for efficient milling.
It is suitable for profiling, pocketing, side milling, slotting, and flat-surface machining.
The variable geometry helps distribute cutting forces and reduce repetitive vibration.
This supports more stable cutting, especially when machining stainless steel and other materials that can be sensitive to chatter.
The tool is designed with edge protection to improve resistance to chipping under demanding cutting conditions.
This is particularly useful for interrupted cuts and machining operations where cutting loads can vary.
Material adhesion and built-up edge are common concerns when milling stainless steel.
The AlCrN coating helps reduce material buildup on the cutting edge and supports more consistent machining.
Stainless steel can form built-up edge during machining, which may degrade cutting performance.
The AlCrN coating’s anti-adhesion characteristics help reduce material buildup and keep the cutting edge cleaner.
Unstable cutting and interrupted engagement can damage the cutting edge.
The protected edge design helps improve resistance to chipping during demanding milling operations.
Uneven cutting forces can lead to chatter and unstable machining.
The unequal flute spacing and variable helix geometry help reduce repetitive cutting-force harmonics.
Higher cutting temperatures can accelerate wear and affect tool life.
The AlCrN coating provides high-temperature performance of approximately 1000°C, helping maintain cutting stability under elevated thermal loads.
The US is suitable for materials with hardness up to approximately 40 HRC, including:
Material grade, machine rigidity, tool diameter, and cutting conditions should be considered when selecting the appropriate tool configuration.
The US 4 Flute Stainless Steel Flat End Mill is suitable for:
It is well suited to general and precision milling applications where cutting stability, edge durability, and resistance to material adhesion are important.
| Specification | Details |
|---|---|
| Product Series | US |
| Tool Type | Flat End Mill |
| Number of Flutes | 4 |
| Substrate | Fine-Grain Carbide |
| Carbide Grain Size | 0.5 μm |
| Coating | AlCrN PVD |
| High-Temperature Performance | Approx. 1000°C |
| Flute Geometry | Unequal Pitch / Variable Helix |
| Cutting Edge | Sharp, Protected Edge |
| Recommended Hardness | Up to 40 HRC |
| Cutting Methods | Moderate-Speed, Dry, Coolant-Assisted |
| Suitable Materials | Stainless Steel, Carbon Steel, Cast Iron, Titanium Alloys |
The US is designed for stainless steel machining where sharp cutting, edge durability, and resistance to adhesion are more important than extreme material removal rates.
Its variable geometry helps stabilize the cutting process, while the AlCrN coating protects the edge against heat, wear, and material buildup.
This combination makes the US a versatile option for stainless steel and other materials up to 40 HRC.
Different stainless steel grades and component geometries may require different tool dimensions or cutting characteristics.
JimmyTool supports custom carbide end mills based on customer drawings, samples, and machining requirements.
Custom solutions can be developed for tool dimensions, flute configuration, geometry, coating, carbide grade, and other application requirements.
For a custom inquiry, provide the material grade, tool diameter, machining operation, cutting conditions, quantity, and drawing or sample where available.
Yes. Stainless steel is the primary application for the US. Its sharp cutting geometry and AlCrN coating help reduce cutting resistance and material adhesion.
The US is designed for stainless steel, carbon steel, cast iron, titanium alloys, and other suitable materials with hardness up to approximately 40 HRC.
Yes. Its unequal flute spacing and variable helix geometry are designed to help reduce repetitive cutting-force patterns and improve machining stability.
Yes. JimmyTool can manufacture custom carbide end mills based on drawings, samples, or specific machining requirements.
Looking for a 4 flute end mill for stainless steel?
Send us your material grade, tool diameter, machining operation, cutting conditions, and required quantity.
For non-standard requirements, a drawing or sample can also be provided. JimmyTool can recommend a suitable US configuration or develop a custom carbide end mill for your application.
