Kennametal announced the latest product in its HARVI high-performance solid end mill series, the HARVI I TE 4-blade solid carbide end mill. HARVI I TE adopts a new design to provide excellent performance in a wide range of materials, including steel, stainless steel, superalloys and cast iron. Since the cutting force is significantly reduced, the tool can be used in any machining center or milling/turning center in the workshop.
"HARVI I TE has consistently outperformed competitors' four-edged end mills in wet and dry machining tests for various materials and applications, and in many cases has unprecedented tool life," said Bernd Fiedler, overall end mill manager. "It shows great in heavy roughing and finishing cuts-from deep cavities and full-width grooves to shoulder milling and dynamic milling."
Kennametal engineers designed HARVI I TE to solve four key issues that plague more than 90% of all milling applications: chip evacuation, tool deflection, corner stability, and fracture caused by radial cutting forces. The result is a durable and versatile tool that is sufficient for most milling applications.
Consider chip evacuation. HARVI I TE has an innovative chip flute design that helps to curl and break the chips into easy-to-handle chips, while a series of chip flutes in the chip flute lift these chips up and away from the workpiece. Both help to promote the flow of coolant, eliminate chip re-cutting, and increase tool life. The twisted end face and the unique cutting groove further promote chip evacuation, but it is also the reason for HARVI I TE's enhanced chamfering and cutting capabilities.
Due to the tool's parabolic core and eccentric facet retreat along the entire edge length, tool deflection can be reduced, thereby significantly reducing cutting friction. This relief also increases edge strength, making the tool a versatile solution. Combined with variable helix angle and asymmetric grooves, it can suppress vibration before it negatively affects machining operations.
"HARVI I TE improves process stability, surface quality and chip evacuation," Fiedler said. "The most important thing is that it maintains these advantages even as feed rates, speeds and cutting depths increase-providing maximum metal removal rates, tool life and productivity."
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