4 HD chipbreaker for removing the carburized layer Large D.O.C. (ap = 0.3 ~ 0.7 mm) Maintains stable machining during applications with several passes and varied hardness HD chipbreaker for carburized layer to unhardened layer Wide bump Chipbreaker cross-section Multi-step structure Good for a wide range of conditions Rake surface The rake can scoop up and control chips even for unhardened material Tool path example Carburized layer Tool path Unhardened Breaks chips into small pieces at different D.O.C. and hardness Chip control comparison (Internal evaluation) 10 mm HD chipbreaker Competitor D (With chipbreaker) Carburized layer - 62 HRC Cutting force in unhardened layer comparison (Internal evaluation) 600 500 15% 400 Radial force (N) 300 200 100 0 HD chipbreaker Competitor D With chipbreaker Unhardened layer Cutting conditions: Vc = 150 m/min, ap = 0.5 mm, f = 0.15 mm/rev, wet, CN**120408 type Workpiece: 15CrMo4 3
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