Meta Description (for CMS): 6mm 4-flute solid carbide flat end mill with coating for steel machining. 50mm overall length, precision ground for CNC milling. Custom sizes available per drawing or sample.
This 6mm 4-flute solid carbide flat end mill is engineered for precision CNC milling of steel and ferrous materials. Manufactured from micro-grain tungsten carbide and finished with a high-performance coating, this cutter delivers stable cutting, extended tool life, and reliable performance in side milling, slotting, and profiling applications.
Quick Answer: A 6mm 4-flute flat end mill is the standard choice for general-purpose steel machining on CNC mills — four flutes balance chip clearance with surface finish, while the coating reduces friction and heat at higher cutting speeds.
| Parameter | Value |
|---|---|
| Tool Type | Solid Carbide Flat End Mill |
| Cutting Diameter | 6mm |
| Overall Length | 50mm |
| Flute Count | 4 |
| End Geometry | Flat / Square |
| Material | Micro-grain Tungsten Carbide |
| Coating | AlTiN / TiAlN (high-performance PVD coating) |
| Helix Angle | 30° / 35° / 45° (selectable) |
| Tolerance | ±0.01mm |
| Suitable Work Materials | Carbon steel, alloy steel, stainless steel, mold steel, cast iron |
| Machine Compatibility | CNC machining centers, milling machines |
| Customization | Available per drawing or sample |
4-Flute Geometry for Steel Machining
The four-flute design provides a balanced cutting action that works well across a range of steel grades. Compared to 2-flute end mills, the 4-flute configuration offers higher feed rates and improved surface finish. Compared to 6-flute tools, it maintains better chip evacuation — making it the most versatile choice for general-purpose steel milling.
Solid Carbide Construction
The tool body is ground from ultra-fine grain tungsten carbide rod. This substrate delivers high rigidity and heat resistance, allowing the end mill to maintain dimensional accuracy under the cutting loads typical of steel machining.
Advanced Coating Technology
The PVD coating — AlTiN or TiAlN depending on your application — is applied to reduce friction, resist oxidation at elevated temperatures, and extend tool life. TiAlN coatings are harder than standard TiN and perform well in steel, stainless steel, and cast iron. AlTiN provides even higher hot hardness for demanding conditions.
Optimized for steel: 4-flute geometry and coated carbide substrate are specifically matched to carbon steel, alloy steel, and stainless steel machining
Stable cutting: Solid carbide body minimizes deflection and chatter during side milling and slotting
Extended tool life: PVD coating reduces wear and heat buildup at the cutting edge
Precision ground: Diameter tolerance held to ±0.01mm for consistent performance across production runs
Versatile application: Suitable for face milling, slotting, ramping, and profiling operations
This end mill is commonly used in:
CNC milling of steel components — brackets, plates, shafts, and general machined parts
Mold and die machining — pre-hardened steel up to HRC 45–55
Slotting and keyway cutting in carbon and alloy steels
Side milling and shoulder milling on CNC vertical machining centers
Prototype and small-batch production where tool change frequency matters
Beyond this standard specification, we manufacture custom carbide end mills to your exact requirements. Whether you need a different diameter, flute count, helix angle, coating, or a completely non-standard geometry, our engineering team can produce it.
How to order custom tools:
Send your drawing or sample — we accept DWG, STEP, PDF files, or a physical reference sample
Engineering review — we recommend the optimal substrate grade, geometry, and coating for your workpiece material
Sample production — first samples typically delivered within 5–7 working days
Production run — full inspection with first-article report included
Custom capability range: Diameter Ø0.1mm – Ø25mm | Flute count 1–12 | Coatings: TiAlN, AlTiN, DLC, nACo, Diamond | Overall length up to 200mm
