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 FC-HT Hand Taps for Cast Irons ② Specification <2D Nitride ③ Recommended Tapping Speeds depending on Materials Cast irons Ductile cast irons 鋳鉄 強靱鋳鉄 5〜10 5〜10 ④ (m/min) (m/min) Product Features ●The FC-HT is suitable for thread processing of hard and brittle materials such as cast iron. It is produced slightly oversized because wear is relatively fast in these materials. ⑤ Tapping Data Comparison of number of holes tapped. Tapping Conditions [M8×1.25] Workpiece Material FC25 FC-HT Bored Hole Size φ6.8 ⑥ Tapping Length 12mm Can Continue Competitors HT Tapping Speed 6.5m/min Machinery Type Special machine 0 500 1,000 1,500 2,000 2,500 3,000 Tapping Fluid Water soluble cutting fluid (Number of holes processed.) ⑦ Comparison of accuracy between HT and FC-HT ⑧ 0 ⑨ 0 ⑩ ⑪ JIS ④-91