
① Selection chart of taps Tapping conditions Machining, in low-speed tapping area Product symbol ISP SP LS-SP LS-SP-K SP LH LS-SP LH LO-SP LS-LO-SP SP 1.5P Spiral Fluted Taps (for blind hole) ① Tap material HSS OX HSS HSS HSS HSS HSS HSS HSS HSS Surface treatment Long, for For general use Long, for general Low helix Long, low Short For general Name I series use general Long neck For left-hand use For left-hand for general helix for chamfer for use threads threads use general use general use Spiral Fluted Taps (for through hole) ② Spiral Pointed Taps (for through hole) ③ Hand Taps ④ Bored Hole Shape For Metric Threads ①-60 ①-37 ①-87 ①-95 ①-77 ①-93 ①-142 ①-149 ①-56 Cemented Carbide Taps For Unified Threads ①-41 ①-90 ①-78 ⑤ For Whitworth Threads ①-43 ①-90 ①-78 For Screw Threads used on Sewing Machines ①-43 Pipe Threads American Pipe Threads Roll Taps For Miniature Threads ⑥ For Trapezoidal Threads ~ S25C Low carbon steels ◆ ◎ S25C ~ S45C Medium carbon steels ◆ ◎ ◆ ◎ ◆ ◎ ◆ ◎ ◆ ◎ ◆ ◎ ◆ ◎ ◆ ◎ S45C ~ High carbon steels ◆ ○ ◆ ○ ◆ ○ ◆ ○ ◆ ○ ◆ ○ ◆ ○ ◆ ○ Special Thread Taps Simple Inspection Tools ⑦ SCM Alloy steels 25 ~ 35HRC Heat treated steel 35 ~ 45HRC Heat treated steel 45 ~ 55HRC Heat treated steel Pipe Taps 55 ~ 63HRC Heat treated steel ⑧ SUS Stainless steels(SUS) SKD Tool steels SC Cast steels FC Cast irons Thread Mills Premium Thread Mills ⑨ FCD Ductile cast irons Cu Copper Bs Brass BsC Brass castings Dies PB Bronze ⑩ AL Wrought aluminum AC, ADC Wrought aluminum Mg Magnesium alloy die castings ZDC Zinc alloy die castings Center Drills Centering Tools Titanium alloys ⑪ Nickel base alloys Thermosetting plastic Thermoplastic resin ①-1