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ATI Stellram has redesigned its 5505VX ball nose milling tool for use on a range of difficult-to-machine materials.

Aimed at aerospace, power generation and mould and die-component makers, the Stellram 5505VX milling tool is suitable for medium-to-heavy roughing operations on nickel-, cobalt- and titanium-based alloys as well as stainless steels, tool steels and cast irons.

The new-look tool accommodates an extensive selection of high-performance, double-edged helical inserts in a choice of resilient grades, including SP6519, a robust substrate finished with the latest generation hard-wearing TiAlN PVD coating.

ATI Stellram has boosted the tool’s ability to withstand the most challenging milling applications by incorporating an axial retention screw, which further supports the insert in the pocket and prevents any movement under heavy axial loads.

Gilles Festeau, ATI Stellram’s technical development manager, said: ‘This screw is positioned behind the insert to add support at the contact point so that axial forces are absorbed.

‘It provides added security even in the most demanding machining conditions.’ Other benefits of the Stellram 5505VX milling tool include better surface finish and component quality, longer tool life and lower inventory levels.

It is available in a variety of diameters from 20-50mm and a selection of shank types comprising Weldon, cylindrical (plain), taper and modular.

The modular system allows the user to extend the length-to-diameter ratio of the extension assembly up to 8:1 thanks to the combined design of the tool, insert geometry and tool extension.

This combination helps reduce the effect of cutting forces by producing a positive cutting action within a more stable cutting environment by absorbing vibration through the addition of the heavy-metal tool extension.

ATI Stellram is set to expand the programme later this year with the introduction of 12 and 16mm diameter tools.

ATI Stellram has also brought out a new ‘A’ style 48 milling geometry, which boasts a smooth cutting action and provides exceptional chip-control capabilities.

ATI Stellram develops and produces high-performance cutting tools for difficult-to-machine materials used in a wide variety of industries including aerospace, power generation, medical, oil and gas production as well as automotive.


Its extensive product range comprises inserts and toolholders suitable for applications in drilling, grooving, milling, threading and turning.In addition ATI Stellram develops new grades and specialist combinations of substrates and coatings. Renowned for solving hard machining challenges, ATI Stellram has also established a reputation for developing innovative solutions designed to deliver better productivity, lower costs and higher quality, especially for the new generation of materials like nickel-, cobalt- and titanium-based alloys. ATI Stellram is a business unit of ATI Engineered Products and part of the ATI Aerospace team, a group of global businesses that produce a wide range of specialty metals and cutting tool solutions.


It has manufacturing facilities in the UK, Switzerland and the United States, and 9 sales offices around the world. ATI Stellram’s tooling engineers and metallurgists work closely with other specialists within the group to develop smarter solutions for difficult-to-machine materials.


This seamless technology transfer between the ATI companies provides an extensive knowledge base, not only of specialty metals, but also cutting tool performance.

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