
Spiral Fluted Tap Series for blind hole Overall length L Chamfer + full thread ℓt Thread length ℓ Thread + Neck ℓn length Shank length ℓs Shank dia. Ds Size of square K Length of square ℓk ① DIN SP Spiral Fluted Taps (for blind hole) ① DIN 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) blind hole processing. ③ Recommended Tapping Speeds 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 DIN371 Cemented Carbide Taps ⑤ Roll Taps TYPE:2 TYPE:3 ⑥ DIN371 DIN376 Special Thread Taps Simple Inspection Tools ⑦ TYPE:4 DIN371 TYPE:5 DIN376/DIN374 Pipe Taps ⑧ Thread Mills Premium Thread Mills ⑨ TYPE:6 DIN376 TYPE:7 DIN5156 Dies ⑩ Center Drills Centering Tools ⑪ DIN ※ This product is different from JIS products in shape and dimensions, please be careful when using. ①-50