① 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 DIN SP OX Spiral Fluted Taps (for blind hole) ① DIN Spiral Fluted Taps, Oxidized Spiral Fluted Taps (for through hole) ② Specification ■The SP OX is a spiral flute tap for blind hole tapping. These taps have an applied oxidation treatment to prevent chip welding on the Spiral Pointed Taps (for through hole) Oxide surface of the taps threaded portion. They are ③ suitable for thread processing of soft steel Recommended Tapping Speeds depending on Materials materials where the chips easily weld to the tap Low carbon steels Medium carbon steels High carbon steels like low carbon. 低炭素鋼 中炭素鋼 高炭素鋼 5 10〜 5 10〜 5 10 〜 Hand Taps ( m / min ) ( m / min ) ( m / min ) ④ TYPE:1 DIN371 Cemented Carbide Taps ⑤ TYPE:2 DIN371 TYPE:3 DIN376/DIN374 Roll Taps ⑥ Special Thread Taps Simple Inspection Tools ⑦ TYPE:4 DIN371 TYPE:5 DIN376/DIN374/DIN5156 Pipe Taps ⑧ Thread Mills Premium Thread Mills ⑨ Dies ⑩ Center Drills Centering Tools ⑪ DIN ①-71 ※ This product is different from JIS products in shape and dimensions, please be careful when using.