
④ Hand Tap Series Overall length L Thread length ℓ Thread + Neck ℓn length Shank length ℓs Shank dia. Ds Size of square K Length of square ℓk JIS EH-HT Spiral Fluted Taps (for blind hole) ① JIS Hand Taps for Hard-to-Machine Materials Spiral Fluted Taps (for through hole) ② Specification Spiral Pointed Taps (for through hole) ③ Recommended Tapping Speeds depending on Materials Thermal refined steels Tool steels 調質鋼 工具鋼 〜 5 〜 5 Hand Taps ( m / min ) ( m / min ) ④ 35〜45HRC Product Features ●The EH-HT tap is suitable for tapping high hardness material from 35 to 45 HRC like high carbon steel, alloy steel forging, thermal refined material and metal mold material. Cemented Carbide Taps ●Tool life was greatly improved by utilizing a cutting edge shape suitable for difficult cutting materials . The EH-HT taps exhibit an excellent wear resistance. ⑤ ●There are two chamfer types available, 2.5P for blind hole and 5P for through hole. Tapping Data Tapping conditions [M6×1 P3] Tap Used EH-HT M6×1 5P Roll Taps Workpiece Material SCM440/Gear EH-HT ⑥ Bored Hole φ5 Can Continue Tapping Length 10mm through hole HT Tapping Speed 9m/min Machinery Type CNC vertical machining center (asynchronous) 0 100 200 300 400 500 600 Special Thread Taps Simple Inspection Tools Holder Type With tension compression (Number of holes tapped) ⑦ Tapping Fluid Insoluble cutting fluid Holes Tapped 500 holes (can continue tapping) Product System Table Pipe Taps Slow Tapping Speed Fast ⑧ 1m/min 3m/min 5m/min 10m/min 15m/min Work piece Material Work piece Material 60HRC 60HRC UH-CT ※Please use UH-CT and High High Thread Mills Premium Thread Mills 55HRC EH-CT with machine with 55HRC ⑨ Hardness 55HRC Hardness perfect synchronous feed. 55HRC Materials Materials EH-CT 45HRC 45HRC 45HRC 45HRC Tempered Tempered Material Material 25HRC 25HRC EH-HT Dies ⑩ Tool & SKS・SKD EH-PO SKS・SKD Tool & Alloy SCM・SCr SCM・SCr Alloy Steel HC+SP Steel High HC - SP High Carbon Carbon Steel S45C HC+PO S45C Steel HC - PO Center Drills Centering Tools Medium S45C S45C Medium ⑪ Carbon Carbon Steel S30C S30C Steel 1m/min 3m/min 5m/min 10m/min 15m/min The chart above shows the processing range. JIS ④-119