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Deeper cavities can be milled using high levels of tooling rigidity and cutting stability, following the launch of LMT’s Kieninger GWR 5x range of solid-carbide tapered shank ball-nose cutters.

As part of the tooling system, a range of four insert geometries has also been developed to accommodate a variety of roughing, semi-finishing and finishing applications, including hard metal milling up to 62 HRC.

The GWR 5x has a tapered body with a solid-carbide shank that, due to its design, creates high levels of rigidity and has excellent vibration-damping properties.

Due to the taper of the shank, access into difficult cavities is improved, especially when using five-axis technology.

Cutter inserts are available from 6 to 16mm diameter, with through-the-tool air or coolant feed available on tools over 10mm.

Each tool body has precision-machined seats to accept the inserts with optimised space for easy chip evacuation.

Each insert is secured by a centre-screw fixing.

There are four insert geometries: WPR-AR, -N, -D and Flatball – FB.

Ideal for heavy metal removal, the WPR-AR is suitable for roughing, semi-finishing and finishing hard metals, steel, cast-iron and high-temperature alloys up to 60HRC.

WPR-D has a spiral geometry that creates a smoother penetration of the material under cut, resulting in high levels of surface finish.

It can be used on hardened steels up to 60 HRC.

LMT’s Flatball-FB geometry is suited for use on semi-finish and finishing cycles on hardened steels up to 62 HRC, as well as cast-steel and high-temperature alloys.

The design of the tool eliminates problems that occur when using conventional ball-nose cutters, such as burning of the insert as a result of the friction created from zero-rotation effect at the centre of the tool.

In addition, due to the lower wear characteristics of Flatball-FB, mismatch is reduced.

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