HP4931 & S4931 – Advanced Solid End Mills for Aluminum milling & rough machining
Boost performance & extend tool life by 15% with HP4931 & S4931—built to adapt to your toughest aluminum milling jobs. Discover more.


Whether you're pushing the limits of high-power aerospace machining or navigating the complexities of general engineering, the HP4931 and S4931 Solid End Mills are your dynamic duo. HP4931 is built for speed and strength—delivering metal removal rates over 16L/min with advanced geometry and coolant delivery.
Meanwhile, S4931 brings finesse and flexibility to low- and medium-power machines, with a light cutting action and extended reach for deep-pocket applications.
Your Challenge:
One-size-fits-all tooling fails to meet the diverse demands of modern machining environments.
Our Solution:
HP4931 and S4931 are engineered to cover the full spectrum—from high-speed, high-volume aerospace cuts to intricate, lower-power operations.
Together, they give you the power to optimize every job, every time.
Both tools are equipped with next-generation coolant solutions. HP4931 features a unique configuration compatible with both MQL and emulsion systems, reducing built-up edge and extending tool life by up to 15%. S4931, on the other hand, integrates a central coolant hole for clean swarf evacuation and thermal control—perfect for tight spaces and complex geometries.
Your Challenge:
Inconsistent coolant delivery leads to tool wear, heat buildup, and process instability.
Our Solution:
With HP4931 and S4931, you get tailored coolant strategies that match your machine’s power and your application’s complexity—keeping your process cool, clean, and future-ready.

HP4931’s 3-flute variable pitch geometry, polished AXT coating, and frontal tooth design are optimized for high-volume Z-axis operations and extreme spindle speeds. S4931 mirrors this intelligence with a lighter geometry, three length variants, and the same advanced coating—delivering stability and performance across a wide range of setups from dynamic milling to helical ramping.
Your Challenge:
You need tools that can adapt to different materials, speeds, or part geometries.
Our Solution:
HP4931 and S4931 share a design philosophy: smart geometry, balanced performance, and adaptability. Whether you're cutting fast or cutting fine, these tools are built to evolve with your needs.

Both tools are designed with the future in mind—not just in performance, but in sustainability. Regrindable and long-lasting, they help reduce waste and tooling costs while supporting your environmental goals.
Your Challenge:
Rising costs and sustainability demands are reshaping how you choose tools.
Our Solution:
HP4931 and S4931 offer high-performance machining in multiple applications with a low environmental footprint—because the future of manufacturing is efficient, adaptable, and responsible.