เอ็นมิลบอลโน๊ตคาร์ไบด์ 55HRC
R0.5 = M1*4*3*50L
R0.5 = M1*4*2*75L
R0.75 = M1.5*4*3*50L
R0.75 = M1.5*4*3*75L
R1 = M2*4*5*50L
R1 = M2*4*4*75L
R1.25 = M4*4*7*50L
R1.25 = M4*4*5*75L
R1.5 = M3*4*6*50L
R1.5 = M3*3*4*100L
R1.75 = M4*4*7*50L
R2 = M4*4*8*50L
R2.25 = M4.5*6*9*50L
R2.5 = M5*5*15*100L
R2.75 = M5.5*6*11*50L
R3 = M6*6*12*100L
R3 = M6*6*13*150L
R3.25 = M6.5*8*15*60L
R3.5 = M7*7*15*50L
R3.75 = M7.5*8*15*60L
R4 = M8*8*16*50L
R4 = M8*8*16*100L
R4 = M8*8*24*150