Общий каталог Yamawa 2022 - 2023 - страница 514

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 PL1 Spiral Fluted Taps (for blind hole) ① JIS Hand Taps for Plastics Spiral Fluted Taps (for through hole) ② Specification <2D Spiral Pointed Taps (for through hole) Nitride ③ Recommended Tapping Speeds depending on Materials Thermosetting plastic 熱硬化性プラスチック 5 10 〜 Hand Taps ( m / min ) ④ Product Features ●The PL1 is a tap for threading thermosetting resin that is exceptionally difficult to machine among the synthetic resin. These plastics have low thermal conductivity and concentrate the heat at the cutting edge. Tool abrasion is severe. The material Cemented Carbide Taps tends to shrink when cutting an internal thread. The PL1 tap is designed to cut slightly oversize to allow for the shrinkage. ⑤ A nitriding treatment is applied for better tool life. Comparison of accuracy between a HT and a PL1 Roll Taps ⑥ 0 Special Thread Taps Simple Inspection Tools ⑦ Pipe Taps ⑧ 0 Thread Mills Premium Thread Mills ⑨ Dies ⑩ Center Drills Centering Tools ⑪ JIS ④-117