3 Excellent surface finish during 2 times higher feed rate machining (Cutting time 1/2) Surface roughness Rz (μm) Surface finish comparison (In-house evaluation) 25 WF (Wiper edge) Conventional E (No wiper) 20 15 10 5 Insert geometry A primary main dot and twin dots on the edge tip provide smooth chip control Low cutting forces with sharp wiper edge design High machining accuracy Wiper edge geometry Controls adhesion during low feed machining Chipbreaker cross section Improved chip control with double-step design 0 0.1 0.2 0.3 0.4 0.5 f (mm/rev) Cutting conditions: Vc = 250 m/min, ap = 0.3 mm, f = 0.1 - 0.5 mm/rev, wet CNMG120408 type Workpiece: 34CrMo4 Breaking area 4 Long tool life WF chipbreaker reduces cutting time by increasing feed fate and extends tool life by 2 times Wear resistance comparison (In-house evaluation) 0.10 0.08 Flank wear VB (mm) 0.06 0.04 0.02 WF (Wiper edge) Conventional E (No wiper) 0 5 10 15 20 Cutting length (m) Total cutting length (m) Total cutting length comparision (In-house evaluation) 17 x2 Approx. 17 m 8.5 Approx. 8.5 m WF Conventional E (Wiper edge) (No wiper) Cutting conditions: Vc = 250 m/min ap = 0.5 mm f = 0.1 mm/rev (No wiper) f = 0.2 mm/rev (WF chipbreaker) Wet, CNMG120408 type Insert grade: P25 grade Workpiece: 34CrMo4 4
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