Tooling by DIJET QM MILL MPMTYPE ■ RECOMMENDED CUTTING CONDITIONS / BOTTOM FACE FINISHING ● MPM type (YOHW type insert) + MSN Carbide Shank Holder Tool dia. (mm) 25 30 32 Material Grades No. of teeth 6N No. of teeth 7N No. of teeth 8N to be cut ℓ ap ae n Vf ℓ ap ae n Vf ℓ ap ae n Vf (mm) (mm) (mm) (min-1) (mm/min) (mm) (mm) (mm) (min-1) (mm/min) (mm) (mm) (mm) (min-1) (mm/min) ~120 ≦0.12 12~25 3,180 3,820 ~160 ≦0.12 15~30 2,640 3,700 ~160 ≦0.12 16~32 2,490 3,980 Carbon steel JC8015 (C50, C55) 190 ≦0.10 12~25 2,380 2,280 240 ≦0.10 15~30 1,980 2,220 240 ≦0.10 16~32 1,870 2,380 (DH102) Below 250HB 235 ≦0.06 12~20 2,070 1,740 290 ≦0.06 15~24 1,700 1,670 290 ≦0.06 16~26 1,620 1,800 ~120 ≦0.12 12~25 2,930 3,160 ~160 ≦0.12 15~30 2,440 3,070 ~160 ≦0.12 16~32 2,290 3,290 Die steel JC8015 (1.2344, 1.2379) 190 ≦0.10 12~25 2,200 1,900 240 ≦0.10 15~30 1,820 1,830 240 ≦0.10 16~32 1,720 1,980 (DH102) Below 255HB 235 ≦0.06 12~20 1,900 1,440 290 ≦0.06 15~24 1,580 1,390 290 ≦0.06 16~26 1,490 1,500 ~120 ≦0.12 12~25 2.930 3,160 ~160 ≦0.12 15~30 2,440 3,070 ~160 ≦0.12 16~32 2,290 3,290 Mold steel JC8015 (1.2311, P20) 190 ≦0.10 12~25 2,200 1,900 240 ≦0.10 15~30 1,820 1,830 240 ≦0.10 16~32 1,720 1,980 (DH102) 30-36HRC 235 ≦0.06 12~20 1,900 1,440 290 ≦0.06 15~24 1,590 1,390 290 ≦0.06 16~26 1,490 1,500 ~120 ≦0.12 12~25 2,550 1,840 ~160 ≦0.12 15~30 2,120 1,780 ~160 ≦0.12 16~32 1,990 1,910 Mold steel DH102 (1.2311, P21) 190 ≦0.10 12~25 1,910 1,100 240 ≦0.10 15~30 1,600 1,080 240 ≦0.10 16~32 1,490 1,150 (JC8015) 38-43HRC 235 ≦0.06 12~20 1,660 840 290 ≦0.06 15~24 1,380 810 290 ≦0.06 16~26 1,290 870 Hardened ~120 ≦0.10 12~25 1,530 920 ~160 ≦0.10 15~30 1,280 900 ~160 ≦0.10 16~32 1,190 960 die steel DH102 (1.2344, 1.2379) (JC8015) 190 ≦0.08 12~25 1,150 550 240 ≦0.08 15~30 960 540 240 ≦0.08 16~32 890 570 42-52HRC 235 – – – – 290 – – – – 290 – – – – Hardened ~120 ≦0.10 12~25 890 430 ~160 ≦0.10 15~30 740 410 ~160 ≦0.10 16~32 700 450 die steel (1.2344, 1.2379) DH102 190 ≦0.08 12~25 670 260 240 ≦0.08 15~30 560 250 240 ≦0.08 16~32 520 270 55-62HRC 235 – – – – 290 – – – – 290 – – – – Grey & Nodular ~120 ≦0.15 12~25 2,550 2,300 ~160 ≦0.15 15~30 2,120 2,230 ~160 ≦0.15 16~32 1,990 2,380 cast iron JC8015 190 ≦0.12 12~25 1,910 1,380 240 ≦0.12 15~30 1,600 1,340 240 ≦0.12 16~32 1,490 1,430 (GG, GGG) (DH102) Below 300HB 235 ≦0.10 12~20 1,660 970 290 ≦0.10 15~24 1,380 940 290 ≦0.10 16~26 1,290 1.010 ~120 ≦0.12 12~25 2,930 3,160 ~160 ≦0.12 15~30 2,440 3,070 ~160 ≦0.12 16~32 2,290 3,290 Stainless steel JC8015 190 ≦0.12 12~25 2,200 1,900 240 ≦0.12 15~30 1,820 1,830 240 ≦0.12 16~32 1,720 1,980 Below 250HB (DH102) 235 ≦0.10 12~20 1,900 1,440 290 ≦0.10 15~24 1,590 1,390 290 ≦0.10 16~26 1,490 1,500 ~120 ≦0.12 12~25 640 460 ~160 ≦0.12 15~30 520 440 ~160 ≦0.12 16~32 500 480 Titanium alloy JC8015 190 ≦0.10 12~25 480 280 240 ≦0.10 15~30 400 270 240 ≦0.10 16~32 370 290 (Ti-6Al-4V) (DH102) 235 ≦0.06 12~20 420 210 290 ≦0.06 15~24 340 200 290 ≦0.06 16~26 320 220 ℓ: Overhung length, ap : Axial depth of cut, ae : Radial depth of cut, n : Spindle speed, Vf : Feed speed ■ NOTE 1) The cutting parameters to be adjusted according to the machine rigidity or work rigidity. 2) In case chatter occurrs, recommend to reduce depth of cut or feed speed. 3) If machine does not have enough power, recommend to reduce depth of cut first and reduce spindle speed and feed speed. B106 4) Use air blow to flush the chips out.