Inovatools Multi-functional end mill packs a punch
Cutiing – Fightmax HP is Inovatools' new roughing/finishing end mill, which the company says allows for helix angles up to 45°.
This four-edged end mill for steel materials has no significant chromium content and can rough and finish all in one process, depending on the cutting challenge. Thanks to its design, Fightmax provides high feed rates and high material removal in both wet and dry conditions, the company notes.
"If someone had told me a few years ago that there would soon be high-performance end mills that I could use for helical plunging directly at 45° instead of the current maximum of 20°, I would have shaken my head in disbelief," commented Douglas Kline, managing director of tool manufacturer Inovatools USA.
According to the company, special, tough, extremely fine-grain carbide mixed in a balanced ratio forms the basis of the tool design to compensate for the high and varying loads to which the tool is exposed when in use. The special design of Fightmax, with its unevenly split geometry and unequal spiral pitch (35°/38°), is the result for quiet, vibration-free operation and a high cutting volume, Inovatools says. According to Kline, "One particular performance factor is the precisely defined rounding of the cutting edges in conjunction with the microgeometry. Thanks to the edge preparation, tiny nicks and irregularities are eliminated, even on a µm scale. This makes the cutting edges of the Fightmax more resistant to premature wear as a result of edge chipping and micro-chipping, which can occur more quickly in the cutting process when untreated tools are used."
Thus the design combined with the large groove cross-sections with a smooth finish for high chip evacuation enable high feed rate parameters even at considerable working depths. As Kline explained, "Fightmax can work at much higher roughing speeds than conventional HPC end mills, and when it comes to both roughing and finishing, it achieves tool lives up to 62% longer, depending on the material."
In the production of grooves, for example, the tool can be operated at very high feed rates while maintaining process reliability. The H5-quality shank design with concentricity of 0.005 mm and the unequal spiral pitch prevent disruptive vibrations even in the high-speed range. This means that users can create precise fitting grooves very quickly with extremely high cutting volumes. Due to the steep plunging angle of up to 45°, enormous quantities of material can be removed during pocket milling, for example.
The special, smooth Varocon Plus coating is said to aid quick removal of chips and make the tool resistant to temperature and wear – a prerequisite for a long service life. Short and free-length versions are available, with diameters ranging from 6 - 20 mm.