Both these features promote coolant flow, eliminate chip re-cutting and improve tool life. The twisted end face and unique gashing not only promote chip evacuation but also account for the HARVI I TE’s strong ramping and plunging capabilities.
When it comes to tool deflection, the HARVI I TE’s parabolic core—and its eccentric, faceted relief along the entire flute length—significantly lower tool deflection and friction. This relief also increases edge strength, making the tool a versatile solution. Working alongside the tool’s variable helix angle and asymmetric flutes, it dampens vibration before it can negatively affect machining operations.
An ‘All-Rounder’
The result of these innovations, which are patented and new to the industry, is a tool that’s durable and versatile enough to tackle the lion’s share of milling applications, says Kennametal’s Steve Archambault, regional product manager, Americas.
“The twisted end face, the chip gashes in the flutes and the faceted relief—those three things are the main contributors to why this end mill delivers such outstanding performance in terms of speed and feed capabilities, but also in terms of requiring less spindle power from a machine, which is important for machines that aren’t so powerful; you can comfortably run higher-end applications on smaller machines,” he adds.
The tool is also an all-rounder in terms of the applications it can tackle, including demanding operations such as full slotting up to two times the diameter, ramping, roughing and finishing, and shoulder cuts. The video below shows how the tool’s twisted cutting edge increases corner stability, enabling soft cutting action even at the highest ramping angles.
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