STS STU65 6.0xD6x15x50

Description

STS STU65 6.0xD6x15x50 is a precision solid carbide end mill engineered for CNC machining of hardened materials up to 65 HRC. Designed with a 3-flute (T3) geometry, this end mill delivers a balanced combination of cutting stability, efficient chip evacuation, and smooth surface finish, making it ideal for die & mould machining, automotive components, aerospace tooling, and precision engineering applications. With a 6 mm cutting diameter, 15 mm flute length, and 50 mm overall length, it is optimized for controlled semi-finishing and finishing operations where rigidity and accuracy are essential.

Manufactured from premium micro-grain carbide rod, the STS STU65 series offers excellent edge toughness, wear resistance, and thermal stability, enabling dependable performance in high-speed CNC milling. The tool is suitable for machining D2 steel, hardened P20, tool steel, and other high-hardness alloy steels in the 55–65 HRC range. Its optimized cutting geometry helps reduce vibration and cutting forces, supporting tight tolerances and improved surface quality in hardened materials.

The D6 shank ensures secure clamping with low run-out, improving machining stability and reducing chatter during high-speed operations. The 3-flute design strikes an effective balance between strength and chip space, allowing smoother cutting compared to 2-flute tools while maintaining better chip control than higher flute counts in hardened steel. This makes the tool suitable for profile milling, slotting, pocketing, and contour machining on CNC vertical machining centers and high-speed milling machines.

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The STS STU65 6.0xD6x15x50 T3 is an excellent choice for CNC shops seeking a compact, reliable, and cost-effective 65 HRC end mill for precision work. It is particularly well suited for smaller features, detailed mould components, and precision parts, where consistent performance, controlled wear, and predictable results are critical to productivity.