Обший каталог Yamawa 2016 - 2017 - страница 694

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Center Drills/Centering Tools Spiral Fluted Taps (for blind hole) NC-SD V NC-SD NC Starting Drills for Bevelling (90°), Coated NC Starting Drills for Center Positioning (125°) Spiral Fluted Taps (for through hole) Specification Specification Spiral Pointed Taps (for through hole) Coating For icon explanation, refer to P.50 For icon explanation, refer to P.50 Hand Taps Product features Product features After boring with normal drills, use NC-SD V(90 °) larger than NC-SD is the drill specially for positioning. It is used before bore hole diameter, and we can obtain clean countersinks with boring holes to heighten positioning accuracy. Having the point better surface finish. angle of a little bit larger degree than normal drill, NC-SD Cemented Carbide Taps guarantees high positioning accuracy without chippings at its cutting edge. Normal drill NC-SD V 90° NC-SD 125° Normal drill Roll Taps Drilling process Drilling process is finished. is finished. Special Thread Taps Simple Inspection Tools Pipe Taps Difference between starting drills and center drills For positioning, center drills can also be used. However in the case of center drill, Thread Mills since cutting edge of normal drill first hits the material, this can cause chippings on cutting edge and/or undesirable one side cutting. Dies Recommended cutting condition unit：min-1 Materials Cutting speed Diameter (mm） （m/min） φ3 φ4 φ5 φ6 φ8 φ 10 φ 12 φ 16 φ 20 φ 25 Center Drills SS400 25 ～ 40 3400 2600 2100 1700 1300 1050 850 640 510 410 S50C 25 ～ 32 3000 2300 1800 1500 1150 900 750 560 450 360 FC250 20 ～ 35 2900 2200 1750 1450 1100 860 720 540 430 350 SCM440 15 ～ 25 2200 1600 1300 1100 800 640 540 400 320 260 SUS304 7 ～ 12 1100 800 640 540 400 320 270 200 160 130 SKD61 8 ～ 15 1200 880 700 590 440 360 300 220 180 150 Centering Tools SKD11 7 ～ 12 1100 800 640 540 400 320 270 200 160 130 AC4C 60 ～ 90 8000 6000 4800 4000 3000 2400 2000 1500 1200 1000 ※For feeding parameter (mm/rev), select 1-3% of the diameter as a basic rule. When cutting on curved face or slanting face, always choose 0.1mm/rev for feeding parameter. JIS CE-51 690 For improvement, spec may change without advance notice.