The UR 4 Flute Roughing Flat End Mill is designed for high-efficiency rough milling of carbon steel, stainless steel, titanium alloys, and other materials up to 40 HRC. Its coarse-tooth design provides large chip space for heavy cutting and fast material removal.
The UR 4 Flute Roughing Flat End Mill is designed for aggressive roughing operations where high material removal rates are a priority.
Its coarse-tooth geometry creates large chip gullets that provide more space for chips during heavy cutting.
This helps the tool handle larger cutting loads while promoting efficient chip evacuation.
The UR uses a 0.6 μm carbide substrate that balances hardness and toughness, combined with a TiAlN PVD coating for thermal and wear resistance.
It is suitable for medium-speed coolant machining and can also be used for dry cutting when the application permits.
Rough milling generates a large volume of chips, making chip evacuation a critical part of tool performance.
The UR uses a coarse-tooth design with large chip spaces to accommodate higher chip loads and move material away from the cutting zone efficiently.
This allows the tool to support large cutting amounts and high material removal rates during roughing.
The large chip gullets provide additional room for chips during heavy cutting.
This helps reduce chip packing and recutting, supporting more efficient material removal.
The 4-flute configuration provides multiple cutting edges while the coarse-tooth geometry maintains sufficient chip space.
This combination is designed for rough milling where productivity and cutting stability need to be balanced.
The UR uses 0.6 μm carbide with a balance of toughness and hardness.
This makes the substrate suitable for the higher cutting loads associated with roughing operations.
The TiAlN PVD coating provides strong oxidation resistance and hot hardness.
Its temperature performance is approximately 800–900°C, helping the cutting edge withstand the thermal load generated during demanding rough milling.
Material adhesion can become a problem when machining stainless steel.
The TiAlN coating provides strong resistance to adhesion, helping reduce material buildup and built-up edge on the cutting edge.
The UR is designed for high-efficiency rough milling, allowing larger chip loads and more aggressive material removal than tools intended primarily for finishing.
Finishing-oriented end mills are not always suitable for removing large amounts of stock.
The UR’s coarse-tooth geometry and large chip space are designed for heavier roughing and higher material removal rates.
High-volume roughing produces more chips and can overload conventional flute spaces.
The large chip gullets provide additional space for chip evacuation and help reduce chip packing.
Heavy cutting can generate substantial heat at the cutting edge.
The TiAlN coating provides thermal resistance to help maintain cutting performance during demanding roughing operations.
Stainless steel can cause material adhesion during machining.
The UR’s TiAlN coating provides anti-adhesion characteristics that help reduce built-up edge and material buildup.
The UR is suitable for materials up to approximately 40 HRC, including:
The actual cutting conditions should be selected according to material grade, tool diameter, machine rigidity, workpiece geometry, and roughing strategy.
The UR 4 Flute Roughing Flat End Mill is suitable for:
It is particularly suited to operations where large amounts of material must be removed efficiently before semi-finishing or finishing.
| Specification | Details |
|---|---|
| Product Series | UR |
| Tool Type | Roughing Flat End Mill |
| Number of Flutes | 4 |
| Tooth Configuration | Coarse Tooth |
| Substrate | Fine-Grain Carbide |
| Carbide Grain Size | 0.6 μm |
| Substrate Characteristics | Balanced Toughness and Hardness |
| Coating | TiAlN PVD |
| Temperature Performance | Approx. 800–900°C |
| Recommended Hardness | Up to 40 HRC |
| Cutting Methods | Medium-Speed Coolant Cutting, Dry Cutting |
| Primary Performance | High Material Removal Rate, Large Chip Capacity |
| Suitable Materials | Carbon Steel, Stainless Steel, Titanium Alloys |
The UR is designed for the roughing stage, where machining productivity depends heavily on how quickly and reliably excess material can be removed.
Its coarse-tooth structure provides generous chip space, while the tough carbide substrate supports the higher loads associated with heavy cutting.
The TiAlN coating adds thermal and wear resistance for demanding roughing applications.
The UR performs particularly well with coolant-assisted medium-speed cutting.
Dry machining is also possible when the machine, workpiece, and cutting conditions are suitable.
The appropriate cutting method should be selected according to material, tool diameter, cutting parameters, machine capability, and chip evacuation conditions.
Different roughing applications may require specific flute geometry, tool diameters, cutting lengths, or other dimensions.
JimmyTool supports custom carbide end mills based on customer drawings, samples, and machining requirements.
Custom solutions can be developed according to tool dimensions, flute configuration, geometry, coating, carbide grade, and application conditions.
For a custom inquiry, provide the workpiece material, hardness, required tool diameter, machining depth, cutting conditions, quantity, and drawing or sample where available.
The UR is designed for heavy roughing and high material removal operations where large amounts of stock need to be removed efficiently.
The coarse-tooth structure provides larger chip spaces, allowing more chips to be evacuated during heavy cutting and reducing the risk of chip packing.
The UR is suitable for carbon steel, stainless steel, titanium alloys, and other applicable materials with hardness up to approximately 40 HRC.
Yes. The UR can be used with coolant during medium-speed machining or for dry cutting when the application and machining conditions are appropriate.
Looking for a 4 flute roughing end mill for high material removal?
Send us your workpiece material, hardness, tool diameter, machining depth, cutting conditions, and required quantity.
For non-standard requirements, a drawing or sample can also be provided. JimmyTool can recommend a suitable UR configuration or develop a custom roughing end mill for your application.
