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 LA-HT Spiral Fluted Taps (for blind hole) ① JIS Hand Taps for Die Cast Materials Spiral Fluted Taps (for through hole) ② Specification <2D Spiral Pointed Taps (for through hole) Nitride ③ Recommended Tapping Speeds depending on Materials Wrought aluminum Aluminum alloy castings Zinc alloy castings アルミ圧延材 アルミ合金鋳物 亜鉛合金鋳物 5 15 〜 5 15 〜 5 15〜 Hand Taps ( m / min ) ( m / min ) ( m / min ) ④ Product Features ●Aluminum thin alloy like(ADC), Zinc alloy die casting(ZDC). It is a slightly oversized tap designed to compensate Cemented Carbide Taps for the materials tendency to contract after tapping. ⑤ Tapping Data Comparison of number of holes tapped. Tapping Conditions [M6×1 1.5P] Workpiece Material ADC12 LA-HT Roll Taps Bored Hole Size φ5 ⑥ Can Continue Tapping Length 14.3mm Tapping Speed 18m/min HT Machinery Type M/C 0 1,000 2,000 3,000 4,000 5,000 Tapping Fluid Water soluble cutting fluid (Number of holes processed.) Special Thread Taps Simple Inspection Tools ⑦ Comparison of accuracy between HT and LA-HT Pipe Taps ⑧ 0 Thread Mills Premium Thread Mills ⑨ 0 Dies ⑩ Center Drills Centering Tools ⑪ JIS ④-107