Sandvik Coromant is releasing two series of ceramic endmills for optimized performance in nickel-based alloys. The latest brazed ceramic CoroMill 316 and ceramic CoroMill Plura endmills offer a more productive method for roughing in ISO S materials compared to standard carbide milling cutters.

With aerospace components manufactured from nickel-based alloys becoming increasingly prevalent, the demand for optimized cutting tools is growing. With this in mind, Sandvik Coromant has developed two innovative solutions that are suitable for the shoulder and facemilling of nickel alloy aeroengine parts.

"The ceramic substrate of the latest CoroMill 316 and CoroMill Plura endmills allows for a different cutting process from traditional solid-carbide tools," explains Tiziana Pro, global product manager for solid endmills at Sandvik Coromant. "Our unique CC6060 grade is purposefully-designed for the superior machining of nickel alloys and is supported by negative geometry that provides a tough cutting edge."

The 6-flute geometry delivers highly productive side milling operations, while the 4-flute geometry boosts facemilling in both the CoroMill 316 and CoroMill Plura versions. The choice between the two depends on machine conditions and the application. Those seeking solutions for difficult-to-reach applications, or the extra flexibility of the exchangeable-head system, should opt for CoroMill 316, while those requiring superior stability are advised to select CoroMill Plura.

Ceramic tools retain their hardness at the high temperatures associated with milling heat -esistant superalloys (HRSAs). As a result, 20 to 30 times the speed can be achieved in comparison to solid-carbide tools, delivering considerable potential for increased productivity. A stable setup is advised without the use of coolant, as coolant would simply burn at this high temperature.

Beyond shoulder milling and facemilling, the new endmills can also be used for pocket milling, helical interpolation, ramping and slot milling. Both CoroMill Plura and CoroMill 316 are part of the Sandvik Coromant Optimized solutions offer within the company's solid round tools range.

The newly introduced series also includes a ceramic ballnose version of CoroMill 316 for blisk machining. This profile-milling solution is suitable for semifinishing operations.