Spiral Fluted Taps (for blind hole)Spiral Fluted Taps(for through hole)Spiral Pointed Taps(for through hole)Hand TapsCementedCarbide TapsRoll TapsSpecial Thread TapsSimple Inspection ToolsPipe TapsThread MillsPremium Thread MillsDiesCenter DrillsCentering Tools JIS ④ Hand Tap Series Overall Thread Thread + Neck Shank Shank Size of Length oflengthlengthlengthlengthdia.squaresquareLℓℓnℓsDsKℓk JIS ① SU-HT Hand Taps for Stainless Steels ② Specification Oxide ③ Recommended Tapping Speeds depending on Materials Low carbon steels Medium carbon steels Stainless steels 低炭素鋼 中炭素鋼 ステンレス鋼 5〜10 5〜10 〜5 ④ (m/min) (m/min) (m/min) Product Features ●The SU-HT is a hand tap suitable for machining of stainless steel, chromium steel, molybdenum steel. These materials have a tendency to work harden easily. ⑤ ●To prevent welding, the taps surface is oxidized. Tapping Data Tapping Conditions[M8×1.25] Workpiece Material SUS304 10mm thick SU-HT ⑥ Tapping Speed 5m/min (HSS P3 4P) Can Continue Bored Hole Size φ6.8 through hole HT OX Cutting Fluid JIS 2, No. 13 (HSS P3 5P) Machinery Type Tapping machine HT The figure on the right shows test data comparing the tool life (HSS P3 5P) ⑦ in tapping SUS 304 with an oxidized standard M8 × 1.25, a standard bright hand tap and the oxidized SU - HT tap. 0 100 200 300 400 500 (Number of holes processed) ⑧ ⑨ ⑩ ⑪ JIS ④-87