4-Flute Titanium HSS End Mill Set 1.5–10mm | CNC Router Bits

4-Flute Titanium-Coated HSS End Mill Set — Precision Milling for CNC & Engraving

Take your CNC machining, engraving, and milling projects to the next level with this professional-grade 7-Piece or 10-Piece 4-Flute HSS End Mill Set. Featuring an AlTiN (Aluminum Titanium Nitride) titanium coating and a hardness rating of HRC 63–66, these end mills deliver exceptional cutting performance across a wide range of materials — from soft aluminum and copper to hardened mold steel and cast iron.

Whether you're a hobbyist woodworker, a professional machinist, or a CNC enthusiast, this versatile set covers diameters from 1.5mm to 10mm, giving you the right cutter for every job.

Key Features

• Sharp 4-flute design — ideal for both roughing and fine finishing cuts
• AlTiN titanium coating — extends tool life, reduces heat buildup, and improves surface finish
• High Speed Steel (HSS) construction — tough, wear-resistant, and built to last
• HRC 63–66 hardness — handles demanding materials without premature dulling
• Rapid chip removal — keeps cuts clean and prevents clogging
• Compatible with CNC routers, engraving machines, and milling centers

Compatible Materials

• ✅ Aluminum, copper, brass (non-ferrous metals)
• ✅ Mild steel, carbon steel, mold steel, tool steel
• ✅ Structural steel, alloy steel, cast iron
• ✅ Titanium, wood
• ❌ Not recommended for ceramics or stone

Specifications

Why Choose This End Mill Set?

The combination of 4-flute geometry and a titanium AlTiN coating makes these end mills significantly more durable and heat-resistant compared to uncoated HSS bits. The multi-diameter range means one set replaces a drawer full of individual cutters — saving you money and keeping your workspace organized. Perfect for hobbyists, machinists, and makers who demand consistent results.

Looking for more workshop and tool accessories? Check out our 10 Pack LED Motion Sensor Cabinet Light to keep your workspace well-lit, or explore our Gravity Electric Grinder Set for another precision-engineered tool in your collection.

For more on cutting tool standards and material hardness ratings, visit the NIH / NCBI research on coated cutting tool performance.

Frequently Asked Questions

Q: What materials can these 4-flute HSS end mills cut?

A: These titanium-coated HSS end mills are suitable for cutting aluminum, copper, brass, mild steel, carbon steel, mold steel, tool steel, structural steel, alloy steel, cast iron, titanium, and wood. They are not recommended for use on ceramics or stone materials.

Q: What is the difference between the 7-piece and 10-piece set?

A: The 7-piece set (105g) includes a selection of the most commonly used diameters, while the 10-piece set (241g) covers the full range from 1.5mm to 10mm, giving you more size options for varied CNC and milling applications.

Q: What does AlTiN coating mean and why does it matter?

A: AlTiN stands for Aluminum Titanium Nitride. This advanced titanium-based coating significantly increases the surface hardness of the end mills, reduces friction and heat generation during cutting, and extends tool life — especially when machining hard metals like mold steel and alloy steel.

Q: Are these end mills compatible with my CNC router?

A: Yes. These end mills feature standard shank diameters (1.5mm–10mm) and are compatible with most CNC routers, engraving machines, and manual milling centers that accept straight-shank end mills. Always verify your machine's collet size before ordering.

Q: Is this product suitable for a beginner machinist?

A: Absolutely. The set is designed to be versatile and user-friendly. Beginners will appreciate the included range of sizes and the sharp, ready-to-use cutting edges, while professionals will value the HRC 63–66 hardness and AlTiN coating for demanding applications.