Greenleaf’s Capstone-360 End Mills Deliver Stability, Speed, and Extended Tool Life Across Demanding Applications!

Greenleaf Corporation has introduced its Capstone-360 high-performance end mills, a cutting-edge tooling solution designed to deliver the speed of solid ceramic end mills with the stability and strength of a carbide shank. This innovative hybrid design offers optimized tool life, superior machining stability, and versatility for a wide range of challenging materials and applications.

The Capstone-360 series is engineered for high-performance slotting, pocketing, and face milling operations, excelling in the machining of heat-resistant super alloys (HRSAs), cast iron, and hardened steels—materials commonly found in the aerospace, oil and gas, power generation, and medical industries. By merging ceramic tips with carbide shanks, these end mills deliver both speed and durability, making them ideal for demanding production environments.

Key Features and Benefits:

• Optimized Value and Performance – The Capstone-360 offers a balance between high productivity and extended tool life, ensuring cost efficiency in both low- and high-volume manufacturing.
• Lower Heat Generation – Featuring specialized geometry and chemistry optimized for Ni-based HRSAs, the tool achieves cutting speeds up to 2,600 sfm (800 m/min) while maintaining lower cutting forces. This reduces heat generation, improves dimensional accuracy, enhances tool retention, and minimizes spindle wear.
• Necked Shank for Accessibility – All tools come with a necked shank design, enabling deeper access into cavities and improving shoulder milling operations while preserving rigidity.
• Versatility Across Materials – While optimized for HRSAs, the Capstone-360 also delivers comparable cycle time reductions and cost savings in hardened steels and cast iron, making it a truly multipurpose solution.

Bernie McConnell, Executive Vice President – Commercial at Greenleaf Corp., emphasized the innovation behind the product:

“By combining advanced materials with cutting-edge design, we have developed an end mill line that enhances productivity, extends tool life, and provides greater value across a wide range of applications. Capstone-360 represents a significant step forward, providing our customers with a powerful solution to maximize efficiency in demanding applications.”

The Capstone-360 is particularly valuable in industries where material hardness and heat resistance often challenge machining efficiency. In aerospace, it supports the precision machining of turbine components made from super alloys. In oil and gas, it handles tough materials used in drilling and refining equipment. For medical device manufacturing, its accuracy and stability are critical for producing high-tolerance components.

With its hybrid construction, advanced thermal management, and precision-focused design, the Capstone-360 end mill line sets a new benchmark for machining stability and cost efficiency. This latest innovation reinforces Greenleaf Corporation’s commitment to delivering high-performance cutting solutions that address the evolving demands of modern manufacturing.