Kennametal Inc.

Michael David Saffels

Mark Alan Francis

Elvin Charles Williams

Floyd Samuel Rosenbaum

A cutting tool assembly for milling a rail top, includes a first section and a second section mounted to the first section. Each section includes a plurality of insert-receiving pockets for receiving a plurality of different types of cutting inserts. The plurality of different types of cutting inserts are arranged in a plurality of helical teeth that may be separated by a helical chip flute. In one embodiment, a first type of cutting insert is formed with a radius, R, a second type of cutting insert is formed with a radius, R, and a third type of cutting insert is formed with a radius, R, to perform a milling operation on three different areas of the rail top.

Cutting tool assembly for milling a rail top

A rotary cutting tool, such as a milling cutter () includes a central hub (), a cutting rim () and a plurality of spokes () connecting the central hub () to the cutting rim (). Each spoke () is separated by an opening () and polygonal in cross-sectional shape formed by two side walls (), two front walls () and a rear wall (). One of the side walls () of each spoke () is formed at a pitch angle () with respect to a central axis () of the cutting tool () that is sufficient to cause lift of chips through the opening (), thereby providing effective chip evacuation during a material removal operation.

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Mogadore, OH, United States of America

Michael David Saffels