Dynamic Bar  Superior chip evacuation (External coolant) Dynamic Bar Competitor A Competitor B Toolholder design developed by using stress analysis technology Inside the workpiece Maximum structural thickness for high toolholder rigidity Controls chattering to achieve stable machining In the products of competitor A and B chips remain inside the workpiece, but chips from the Dynamic Bar are all evacuated from the workpiece. Large chip pocket produces superior chip evacuation F Boring Chip evacuation direction Dynamic design by using the latest computer simulation technology  Comparison of pocket length  Chip evacuation direction Pocket length SCLC(P) type STLB(P) type Pocket length (mm) Description Dynamic Bar Competitor A A16-SCLPR09-18 type 37 29 A20-SCLCR09-22 type 48 32 Better evacuation by backward chip flow The Dynamic Bar achieves superior chip evacuation High rigidity and chattering resistance are ensured by using a special alloy and with help of stress analysis technology.  Comparison of vibration tendency  Comparison of surface finish Vibration of the Dynamic Bar was minimal even at high cutting speeds, enabling stable machining. (L/D) Good SCM415 Dynamic Bar Competitor A Competitor B 5.5 Vc=150m/min SCM415 5.0 ap=0.5mm Surface wall Vc=210m/min 5 4.5 f=0.1mm/rev ap=0.5mm S16-SCLPR09 type f=0.1mm/rev 4 CPMH090304L-Y A16Q-SCLPR09-18 type CPMT090304XP(PV7020) 3 L/D=4 External coolant 2 Surface Roughness Direction of vibration 1 measurement Ra=0.4µm Ra=0.6µm Ra=3.4µm Rz=2.3µm Rz=3.6µm Rz=14.0µm Dynamic Bar Competitor A Competitor B Oscillator y AE type waveform Maximum toolholder overhang length (L/D) F2