Общий каталог Yamawa 2022 - 2023 - страница 256

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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 MHSL Z-PRO Spiral Fluted Taps for Carbon Steels of Medium Hardness, Through Hole Use (with LH Spiral Flutes) ② Specification Coating <2D ③ Recommended Tapping Speeds depending on Materials High carbon steels Alloy steels Thermal refined steels 高炭素鋼 合金鋼 調質鋼 3〜15 3〜15 3〜15 ④ (m/min) (m/min) (m/min)25〜35HRC Product Features ● High wear-resistant HSS material and special coating for longer tool life ● Unique flute design for stable and smooth chip ejection ● Secures appropriate tool projection length to prevent interference with workpieces ⑤ ⑥ Suitable for tapping threads in mold parts Suitable for creating tip mounting threads Tapping Data After tapping 200 holes (The tap can still be used for tapping) ⑦ Tapping Conditions [M2.5×0.45] State of Wear Good internal threads Workpiece Material SCM440（45HRC） Bored Hole Size φ2.1 Tapping Length 5mm Tapping Speed 5m/min ⑧ Machine Machining center, vertical type(fully synchronized feed) Tapping Fluid Water soluble cutting fluid Tapping examples on the market ⑨ MHSL Workpiece Material Tapping Condition / Tapping ResultNominal SizeMaterial Symbol(Hardness)Bored Hole SizeTapping LengthCutting SpeedFeed（mm）（mm）*（m/min）MechanismCutting FluidTool Life(Holes/pc)Remarks M2.5 × 0.45 SCM440（45HRC） 2.1 4（1.6D） 2.5 Synchronized Water soluble 300 holes Reduced breakage problems M2.5 × 0.45 SKD61（45HRC） 2.1 5（2D） 5 Synchronized Water soluble 150 holes or more(The tap still works well)- M4 × 0.7 SCM440（45HRC） 3.4 6（1.5D） 5 Synchronized Water soluble 351holes Reduced tapping time ⑩ * (D) indicates the ratio of the tapping length to the outside diameter. Measures against tapping-related problems When tapping internal threads in a through hole toward the slanted surface as shown on the left, spot facing as shown on the right is recommended to prevent the occurrence of a broken tap or such other problems. ⑪ Before countermeasures After countermeasures Spot facing JIS ②-3