Spiral Fluted Tap Series for blind hole Overall length L Thread length ℓ Thread + Neck ℓn length Shank length ℓs Shank dia. Ds Size of square K Length of square ℓk ① ANSI ANSI SP Spiral Fluted Taps (for blind hole) ① Spiral Fluted Taps Spiral Fluted Taps (for through hole) ② Specification ■Spiral flutes continuously curl the chips and discharge them back toward the shank of the tap. Spiral flute taps are the most suitable for Spiral Pointed Taps (for through hole) ③ blind hole processing. Recommended Tapping Speed depending on Materials Medium carbon steels High carbon steels 中炭素鋼 高炭素鋼 5 10〜 5 10 〜 Hand Taps ( m / min ) ( m / min ) ④ TYPE:1 TYPE:2 Cemented Carbide Taps ⑤ Roll Taps ⑥ TYPE:3 TYPE:4 Special Thread Taps Simple Inspection Tools ⑦ TYPE:5 TYPE:6 Pipe Taps ⑧ Thread Mills Premium Thread Mills ⑨ Segment:1C L ℓ ℓn ℓs Ds K ℓk No. of TYPE Size Class Code Chamfer Dies (inch) (inch) (inch) (inch) (inch) (inch) (inch) flutes ⑩ For Metric Threads M2 × 0.4 D3 SS2.0E3NEB 2.5P 1.772 0.314 - 1.161 0.141 0.11 0.187 2 1 M2.2 × 0.45 D3 SS2.2F3NEB 2.5P 1.772 0.314 - 1.161 0.141 0.11 0.187 2 1 M2.5 × 0.45 D3 SS2.5F3NEB 2.5P 2.205 0.354 0.693 1.28 0.141 0.11 0.187 2 2 Center Drills Centering Tools M2.6 × 0.45 D3 SS2.6F3NEB 2.5P 2.205 0.354 0.709 1.28 0.141 0.11 0.187 2 2 ⑪ M3 × 0.5 D3 SS3.0G3NEB 2.5P 2.205 0.433 0.736 1.339 0.141 0.11 0.187 3 2 M3.5 × 0.6 D4 SS3.5H4NEB 2.5P 2.205 0.433 0.748 1.339 0.141 0.11 0.187 3 2 ANSI ※ This product is different from JIS products in shape and dimensions, please be careful when using. ①-44