RECOMMENDED TAPPING SPEEDS & LUBRICANTS

1. Following usage chart the recommended tapping speeds and cutting fluids, tap material type of tap chamfer length dimension of drill hole work materials and cutting fluids are important factors for determining suitable tapping speed.
2. When work material has excellent workability, when there is a little depth of tapping, or when tapping flud can be sufficieny, select rather high tapping speed. When workability of work material is unknown, it is safe to try nearly the lowest tapping speed at first, and theen increwse the speed gradually.

Workpiece materials		Tapping speed					Cutting fluids
Workpiece materials		Hand tap	Spiral fluted tap	Spiral pointed tap	Fluteless tap	Pipe thread tap	Non water- soluble	water-soluble	Semi- dry
Low Carbon Steels	≦C 0.2%	7∼12	8∼13	10∼20	8∼14	3∼7	◎	☉	△
Medium Carbon Steels	C 0.25≦0.45%	6∼11	6∼12	8∼15	7∼10	3∼6	◎	☉	△
High Carbon Steels	≦C 0.45%	5∼9	5∼10	8∼13	5∼8	2∼5	◎	☉	△
Alloy Steels	SCM.SNCM	6∼10	6∼12	7∼11	5∼8	2∼5	◎	△	△
Thermal Refined Steels	20≦45HRC	3∼5	3∼5	4∼7	─	2∼5	◎	△	─
Stainless Steels	SUS	3∼7	3∼8	4∼10	5∼10	3∼8	◎	☉	─
Tool Steels	SKD	5∼9	5∼9	6∼9	─	2∼4	◎	─	─
Cast Steels	SC	6∼11	6∼11	8∼15	─	2∼5	◎	☉	─
Cast Irons	FC	10∼16	─	─	─	2∼5	◎	☉	☉
Ductile Cast Irons	FCD	6∼12	6∼12	7∼16	─	4∼8	◎	☉	☉
Coppers	CU	6∼10	6∼11	7∼13	7∼13	3∼5	☉	☉	─
Brass.Brass Casting	BS. BSC	10∼18	10∼20	13∼25	7∼13	5∼10	☉	☉	☉
Bronze.Bronze Casting	PB. PBC	6∼12	6∼12	10∼18	7∼12	5∼11	☉	☉	─
Wrought Aluminum	AL	10∼20	10∼20	15∼25	10∼20	5∼12	◎	☉	△
AluminumAlloyCastings	AC. ADC	10∼17	10∼17	12∼20	10∼16	10∼15	◎	☉	△
Magnesium Alloy Castings	MC	7∼12	7∼12	10∼17	─	7∼12	◎	☉	△
Zinc Alloy Die castings	ZDC	7∼15	7∼15	10∼17	7∼12	7∼15	◎	☉	△
Thermosetting Plastic	BAKELITE PHENOL-PF	10∼17	10∼17	10∼18	─	5∼10	─	☉	☉
Thermoplastic	VINYL. PVC NYLON	10∼17	10∼17	10∼18	─	5∼10	─	☉	☉
Titanium Alloys	Ti-6AL-4V	─	3∼8	4∼9	─	─	◎	☉	─

• Cutting fluids ◎ideal ☉good △applicable ─not applicable