4 Flutes carbide step inner radous endmill for soft metals

Introduction:

Our 4-flute carbide step end mill with inner radius design is specially engineered for high-speed machining of soft metals including aluminum (6061-T6, 7075), copper, and brass alloys. The unique stepped cutting edges with radius corners combine aggressive material removal and smooth finishing in one operation, while preventing tool marks and burrs—ideal for aerospace components, heat sinks, and precision fittings.

Features:

✔ 4-Flute Step Design – Multi-level cutting edges for roughing + finishing in a single pass.

✔ Inner Radius Corners (R0.2-R1.0) – Prevents chipping in gummy materials.

✔ High Helix (45°) – Superior chip evacuation in deep pockets.

✔ Uncoated Polish Finish – Reduces material adhesion (no coating needed for soft metals).

✔ Precision Ground – ±0.01mm tolerance, <0.005mm runout.

✔ Size Range – 3mm-16mm (1/8" to 5/8"), custom lengths available.

Advantages:

✅ 30% Faster Machining – Combined roughing/finishing reduces cycle time.

✅ Burr-Free Edges – Radius corners eliminate sharp transitions

✅ Long Tool Life – 5X durability vs. HSS in aluminum.

✅ Reduced Vibration – Balanced geometry for thin-wall machining.

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  CHANGZHOU AMG PRECISION TOOL MANUFACTURING CO., LTD. is a leading manufacturer and solution provider specializing in high-performance carbide cutting tools for precision CNC machining applications. With a strong commitment to innovation and quality, we design and produce an extensive range of standard and custom cutting tools, including carbide drill bits, end mills, reamers, and complex non-standard forming tools tailored to meet the most demanding machining challenges.