Ball-nose / radius type cutters MRF/MRFW Applicable inserts Recommended depth of cut Insert Description Depth of cut (mm) Description Applications ap Pf Top RDFG 08FR face mark MRF08-S12 0.2 (Max0.3) 0.8 10FR MRF10-S12 0.2 1 12FR Standard MRF12-S12 0.5 1.2 16FR neck MRF16-S20 0.5 1.6 20FR MRF20-S25 1 2 Top face shown 25FR MRF25-S32 1 2.5 Check the top face mark of both insert and toolholder. MRF08-S12-130 0.2 (Max0.3) 0.8 MRF10-S12-150 0.2 1 MRF12-S12-160 0.5 1.2 Long neck MRF16-S20-160 0.5 1.6 MRF20-S25-180 1 2 Pf ap MRF25-S32-200 1 2.5 Carbide MRFW08-S08 0.2 (Max0.3) 0.8 standard MRFW10-S10 0.2 1 neck MRFW12-S12 0.5 1.2 MRFW08-S08-130 0.2 (Max0.3) 0.8 Carbide MRFW10-S10-140 0.2 1 long Neck MRFW12-S12-150 0.5 1.2 For ø8, holder may be broken because of over load if ap exceeds 0.3mm. Recommended cutting conditions (At cutting dia. DCX) ø8 ø10 ø12 Workpiece material Insert grades Vc fz (m/min) (mm/t) Vc(m/min) fz(mm/t) Vc(m/min) fz(mm/t) Vc(m/min) fz(mm/t) (n:min-1) (Vf:mm/min) (n:min-1) (Vf:mm/min) (n:min-1) (Vf:mm/min) 150 0.2 150 0.2 150 0.2 Carbon steel PR915 100~200 0.1~0.3 (5,970) (2,390) (4,770) (1,910) (3,980) (1,590) Alloy steel PR915 80~180 0.1~0.3 130 0.2 130 0.2 130 0.2 (5,170) (2,070) (4,140) (1,660) (3,450) (1,380) Mold steel PR915 50~150 0.1~0.2 100 0.15 100 0.15 100 0.15 (3,980) (1,190) (3,180) (950) (2,650) (800) 100 0.15 100 0.15 100 0.15 Stainless steel PR915 50~150 0.1~0.2 (3,980) (1,190) (3,180) (950) (2,650) (800) Cast iron PR915 100~200 0.2~0.4 150 (5,970) 0.3 (3,580) 150 (4,770) 0.3 (2,860) 150 (3,980) 0.3 (2,390) M ø16 ø20 ø25 Vc fz Workpiece material Insert grades Vc(m/min) fz(mm/t) Vc(m/min) fz(mm/t) Vc(m/min) fz(mm/t) (m/min) (mm/t) (n:min-1) (Vf:mm/min) (n:min-1) (Vf:mm/min) (n:min-1) (Vf:mm/min) 150 0.2 150 0.2 150 0.2 Carbon steel PR915 100~200 0.1~0.3 (2,980) (1,190) (2,390) (950) (1,910) (760) Milling Alloy steel PR915 80~180 0.1~0.3 130 0.2 130 0.2 130 0.2 (2,590) (1,030) (2,070) (830) (1,660) (660) Mold steel PR915 50~150 0.1~0.2 100 0.15 100 0.15 100 0.15 (1,990) (600) (1,590) (480) (1,270) (380) 100 0.15 100 0.15 100 0.15 Stainless steel PR915 50~150 0.1~0.2 (1,990) (600) (1,590) (480) (1,270) (380) 150 0.3 150 0.3 150 0.3 Cast iron PR915 100~200 0.2~0.4 (2,980) (1,790) (2,390) (1,430) (1,910) (1,150) Actual cutting speed (Vd) conversion coefficient table • Vd varies depending on ap and slant face angle. • Vd can be obtained by dividing the conversion coefficient into the recommended cutting speed. Model Tool dia. (DCX) ø8 ø10 ø12 Depth of cut (t:mm) 0.1 0.2 0.1 0.2 0.2 0.5 DCX (Tool dia.) 15° 1.00 1.00 1.00 1.00 1.00 1.00 30° 1.05 1.02 1.05 1.03 1.04 1.01 Slant face 45° 1.18 1.12 1.20 1.14 1.16 1.07 e) an gl angle (α) 60° 1.47 1.34 1.51 1.38 1.42 1.24 ace 75° 2.15 1.82 2.24 1.92 2.02 1.60 tf lan α (S 90°(Horizontal plane) 4.48 3.22 5.06 3.57 3.92 2.50 Tool dia. (DCX) ø16 ø20 ø25 ) cut Depth of cut (t:mm) 0.2 0.5 0.5 1 0.5 1 of th 15° 1.00 1.00 1.00 1.02 1.00 1.01 ep t (D 30° 1.05 1.01 1.02 1.00 1.03 1.00 Slant face 45° 1.18 1.10 1.12 1.06 1.14 1.08 DC (Actual cutting dia.) angle (α) 60° 1.47 1.30 1.34 1.21 1.38 1.25 75° 2.14 1.73 1.83 1.53 1.93 1.62 90°(Horizontal plane) 4.48 2.87 3.20 2.29 3.57 2.55 e.g.) Suppose tool dia. 8mm, ap=0.1mm, slant face angle 90˚: The actual Cutting speed Vd for carbon steel machining, when Vc is 150m/min at the biggest diameter, Vd can be obtained as Vd=150÷4.48=33.5m/min N : Standard item R : Right hand only L : Left hand only U : Check availability M191