Widia’s extended 70NS series provides increased radial engagement when compared with ball-nosed end mills. This geometry revision has been optimised for circular plunging, 3D machining, face milling and pocketing applications on HRSAs and stainless steels.
Designed for high-feed machining processes, the 6-flute tools offer 3xD neck reach and optimised corner radii. According to Widia, these attributes combine to improve tool life and cutting data, while generating a smooth cutting action that reduces spindle load by minimising radial forces on the cutting tool. Further enhancing the rigidity and strength of the 70NS X-Feed series is the 20° flute design.
The programme extension is offered in diameters that include 6, 8, 10, 12, 16, 20 and 25 mm, with a neck diameter of 5.5 mm on the 6 mm diameter tool, through to 23.5 mm on the 25 mm diameter end mill (necked length across the range extends from 17.75 to 74.25 mm).
Geometry on the extended 70NS series offers a radial engagement of 55% when compared to 5-10% with ball-nosed tools. Widia says this design reduces tool wear and subsequent tool changeovers, while dissipating heat through the tool and the chips more efficiently. Furthermore, this large radial engagement increases material removal rates and enables the end user to increase cutting speeds and feeds.
