Spare Parts Clamp Screw Description Wrench Description Tightening Torque (N·m) HS-2524TRP FTP-5 0.4 HS-2534TRP FTP-6 0.5 HS-3048TRP HS-4067TRP FTP-7 0.8 Recommended Cutting Conditions Recommended Insert Grades / n (min-1) Drill Dia. Cutting Speed Vc (m/min) φDc(mm) Workpiece Material Remarks PR1535 PR1525 f (mm/rev) φ8 φ11 φ14 φ18 φ22 φ25 n (min-1) 3,980 - 7,160 2,890 - 5,210 2,270 - 4,090 1,770 - 3,180 1,450 - 2,600 1,270 - 2,290 Low Carbon Steel ★ ☆ 100-180 100-180 f (mm/rev) 0.12 - 0.24 0.12 - 0.31 0.16 - 0.36 0.16 - 0.4 0.2 - 0.45 0.2 - 0.45 n (min-1) 3,980 - 5,970 2,890 - 4,340 2,270 - 3,410 1,770 - 2,650 1,450 - 2,170 1,270 - 1,910 Carbon Steel ★ ☆ 100-150 100-150 f (mm/rev) 0.12 - 0.24 0.12 - 0.31 0.16 - 0.36 0.16 - 0.4 0.2 - 0.45 0.2 - 0.45 K n (min-1) 2,790 - 4,780 2,030 - 3,470 1,590 - 2,730 1,240 - 2,120 1,010 - 1,740 890 - 1,530 Alloy Steel ★ ☆ 70-120 70-120 f (mm/rev) 0.12 - 0.24 0.12 - 0.31 0.16 - 0.36 0.16 - 0.4 0.2 - 0.45 0.2 - 0.45 n (min-1) 1,990 - 3,580 1,450 - 2,600 1,140 - 2,050 880 - 1,590 720 - 1,300 640 - 1,150 Drilling Mold Steel ★ ☆ 50-90 50-90 Coolant f (mm/rev) 0.08 - 0.17 0.08 - 0.22 0.11 - 0.25 0.11 - 0.28 0.14 - 0.32 0.14 - 0.32 K16 n (min-1) 1,590 - 2,790 1,160 - 2,030 910 - 1,590 710 - 1,240 580 - 1,010 510 - 890 Stainless Steel ★ ☆ 40-70 40-70 0.1 - 0.24 0.1 - 0.24 0.12 - 0.3 0.15 - 0.3 0.15 - 0.3 0.15 - 0.35 f (mm/rev) *Feed Rate 0.15 mm/rev or less is recommended until drilling depth reaches 0.5D n (min-1) 3,580 - 6,760 2,600 - 4,920 2,050 - 3,870 1,590 - 3,010 1,300 - 2,460 1,150 - 2,170 Gray Cast Iron ☆ ★ 90-170 90-170 f (mm/rev) 0.14 - 0.29 0.14 - 0.37 0.19 - 0.43 0.19 - 0.45 0.24 - 0.45 0.24 - 0.45 n (min-1) 1,590 - 4,780 1,160 - 3,470 910 - 2,730 710 - 2,120 580 - 1,740 510 - 1,530 Nodular Cast Iron ☆ ★ 40-120 40-120 f (mm/rev) 0.12 - 0.24 0.12 - 0.31 0.16 - 0.36 0.16 - 0.4 0.2 - 0.45 0.2 - 0.45 ★1st Recommendation ☆2nd Recommendation As drilling depth increases (3D 5D 8D), feed rates should be reduced. Recommended feed rate: 3D type = 100%, 5D type = 80% or less, 8D type = 70% or less. K15