Обший каталог Yamawa 2016 - 2017 - страница 779

Предыдущая страница Следующая страница

Навигация

Recommended Tapping Speeds

  • Tapping Speeds 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

Workpiece MaterialsSpiral FlutedSpiral PointedTapping Speed Roll TapsStraight FlutedCemented Carbide
Low Carbon SteelsCk25
Medium Carbon SteelsCk35 Ck45
High Carbon SteelsCk60
Alloy Steels42 CrMo 4
Heat Treated Steels25 35HRC, 35 45HRC
Stainless SteelsX5 CrNi 18 9, X5 CrNiMo 17 12 2
Tool SteelsX 210 Cr 12, X 40 CrMoV 5 1
Cast Steels-
Cast IronsGG-25
Ductile Cast IronsGGG-50
CoppersE-Cu57
Brass · Brass CastingCuZn37, CuZn35Pb1
Phosphor Bronze · Phosphor Bronze CastingCuSn6
Wrought AluminumAlMn1Cu
Aluminum Alloy CastingsG-AlSi7Mg
Magnesium Alloy CastingsEN-MC21120
Zinc Alloy DiecastingsGD-ZnAl4
Thermosetting PlasticBakelite (Phenol-PF)
Thermoplastic resinPVC, Nylon
Titanium AlloysTiAl6V4
Nickel Base AlloysNiCr 15 Fe 7 TiAl NiCr22FeMo, NiCr20Ti

■Formula

Tapping Speed (Vc) Revolution of tap (n)

n : Revolution of tap (min-1) Vc : Tapping Speed (m/min) : 3.14 Dc : Nominal dia. of tap (mm) Dc : Nominal dia. of tap (mm) : 3.14