Общий каталог Yamawa 2022 - 2023 - страница 1155

Recommended Tapping Speeds ■Tapping Speeds Description of products Following usage conditions affect tapping speeds : kind of taps, workpieces, number of chamfered threads, materials, hole condition and fluid. It is necessary to select the suitable tapping speed by paying attention to these conditions. When work material has excellent workability, when there is a little depth of tapping, or when tapping fluid can be sufficient, select rather higher tapping speed. When workability of work material is unknown, to be safe, try nearly the lowest tapping speed at first, and then increase the speed gradually. * Following speed is basically for the cutting condition under the use of insoluble cutting oil. Under the use of water soluble cutting oil, please choose 30% slower speed. Unit : m/min Tapping Speed Workpiece Materials Spiral Fluted Spiral Pointed Roll Taps Straight Fluted Cemented Carbide Low Carbon Steels Medium Carbon Steels High Carbon Steels Alloy Steels Thermal refined steels Stainless Steels Tool Steels Cast Steels Cast Irons Ductile Cast Irons Coppers Brass · Brass Casting Phosphor Bronze · Phosphor Bronze Casting Wrought Aluminum Aluminum Alloy Castings Magnesium Alloy Castings Zinc Alloy Diecastings Thermosetting Plastic Bakelite (Phenol-PF) Thermoplastic resin PVC, Nylon Titanium Alloys Ti-6AI-4V etc Nickel Base Alloys Hastelloy, Inconel, Waspaloy ■Formula Tapping Speed (Vc) Revolution Speed of tap (n) n : Revolution Speed of tap (min-1) Vc : Tapping Speed (m/min) : 3.14 Dc : Nominal dia. of tap (mm) Information Technical Dc : Nominal dia. of tap (mm) : 3.14 Technical-4