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 ② Spiral Fluted Tap Series for through hole Overall Thread Thread + Neck Shank Shank Size of Length oflengthlengthlengthlengthdia.squaresquareLℓℓnℓsDsKℓk JIS ① F-SL Spiral Fluted Taps for High Speed Tapping, Through Hole Use (with LH Spiral Flutes) ② Specification Coating ③ Recommended Tapping Speeds depending on Materials Low carbon steels Medium carbon steels 低炭素鋼 中炭素鋼 15〜25 15〜25 ④ (m/min) (m/min) Product Features ●High speed machining is possible with a machine equipped with a fully synchronous feed mechanism. ⑤ ●At low speed, the shape and discharge of the chip deteriorate, causing problems. Tapping Data Tapping conditions [M8 × 1.25] ⑥ Workpiece Material S50CHardnessRaw material Bored Hole Shape Through hole Tapping Length 1.5D ~ F-SL Machinery Type M/C Can Continue ⑦ Tapping Direction VerticalTypeofFeedSynchronous Competitors PO Tapping Speed 30m/min 0 500 1000 1500 2000 2500 Cutting Fluid Water soluble cutting fluid (Number of holes processed.) Bored Hole Process Drill Tapped Holes 2,000 holes ⑧ Recommended speed table Slow Tapping Speed Fast ⑨ Work piece 5m/minMaterial 10m/min 15m/min 20m/min 30m/min 50m/min Work pieceFully synchronous feed areaMaterial Alloy SCM SCM Alloy Steel SCr SCr Steel High High ⑩ CarbonSteelS45CMediumS45C F-SL HDISL S45C CarbonSteelS45CMedium CarbonSteelS30C PO +PO CarbonS30CSteel Low S25C S25C Low ⑪ CarbonSteelSS400 CarbonSS400Steel 5m/min 10m/min 15m/min 20m/min 30m/min 50m/min The above diagram is for the different materials shown. JIS ②-25