SUMIBORON doc (mm)Depth of Cut, Flank Wear Width, VB (mm) SUMIBORON Insert With Chipbreaker H Hardened Steel Break Master N-FV /-LV /-SV - Characteristics l SUMIBORON one-use insert with chipbreaker. l N-SV type is perfect for carburised layer removal while N-FV / N-LV types are best suited to finishing of hardened steel. l Breaker included on the CBN edge, chipbreaking effect can be maintained throughout machining process. l Unique breaker design can be applied to both hardened and non-hardened parts with effective chip control. l SV type lineup now includes BNC2010 / BNC160 for good wear resistance, while SUMIBORON BNC2020 / BNC200 allows high efficiency machining. In addition to general purpose SUMIBORON BNC2020 / BNC200, the l N-FV / N-LV type lineup includes BNC2010 / BNC160 for excellent wear resistance and general purpose uncoated SUMIBORON BN2000. - Application - Cutting Carburised Layer Removal Range Performance N- S V breakage breakageCompetitor´sBNX20 0,2 CBN N- LV 0,1 BNC200 N- F V Feed Rate, f (mm/rev) 0 20 40 Cutting Time (min) Cutting Speed, Vc (m/min)50100170 230llll Work material: 42CrMo4Insert: CNGG120408N-SV NC4Cutting conditions: vc=100m/min, f=0,13mm/rev doc=0,4mm, x3 passes, Dry * When machining heat treated steel harder than HRC50 Stable tool life with BNC200 the depth of cut should not exceed 0,5 mm. - Application Examples External Carburised Layer Removal Carburised Face Layer Removal Break Master N-SV type improves chip control with increased productivity until the pre-set tool life. Break Master N-SV Tool life = 200pcs Break Master N-SV No chip control problem No breaker No constant stopages or incorrect part dimension Constant chip control problem problem and the chips are small. BNC200 (no breaker) Double the tool life of competitor’s CBN Tool life = 200pcs No. of pcs / unit of time (relative) Work material: 42CrMo4, Carburised steel (shaft) Insert: CNGG 120408 N-SV NC4 (BNC200)Conditions:vc=150m/min, f=0,15mm/rev,doc=0,5mm,x 2 passes,WetComp. CBN (no breaker)Tool life = 100pcsWork material: 42CrMo4 (HRC30-62)Insert:CNGG 120408 N-SV NC4 (BNC200)Conditions:vc=140m/min,f=0,15mm/rev,doc=0,3mm,Wet L6