Общий каталог Yamawa 2022 - 2023 - страница 258

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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 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 10〜20 10〜20 10〜20 ④ (m/min) (m/min) (m/min)25〜35HRCProduct Features ●Ideal for forged products and tempered S48C to S55C materials from 25 to 35 HRC. ●Produced from HSS-Co materials with a special coating for enhanced wear resistance and to improve long tool life. ●The original left hand spiral flute shape is used to produce a smooth chip discharge and increase performance ⑤ in the medium tapping speed range. Also, the MHSL improves the internal threads surface finish. Improved chip ejection! Tapping Data Tapping Conditions [M12×1.25] Workpiece Material S53C (forged) / Hub bearing MHSL Bored Hole Size φ10.8 Can Continue ⑥ Tapping Length 12mm through hole Competitors Tapping Speed 30m/min Spiral Point Tap Machine Horizontal machining center(fully synchronized feed) 0 500 1000 1500 2000 2500 3000（Number of holoes processed.） Tapping Fluid Water soluble cutting fluid ⑦ Tapping Conditions [M12×1.25] Enhanced wear resistance Improved surface finish Workpiece Materials S53C（25HRC） Tapping Length 13mm The previousmodel causedabnormal noise MHSL MHSL has highcutting performance,Initial tappingproviding excellentsurface finish of Tapping Speed 30m/min after tapping1,239 holes. PO bright finish Internal thread internal threads.Initial tapping Machine Machining center Internal thread ⑧ Tapping Fluid Water soluble cutting fluid Left-hand spiralWith surfacetreatment1,239 holesMHSL2,800 holesStill works Left-hand spiralWith surfacetreatmentInitial tapping Tapping examples on the market Worn well Internal thread MHSL Workpiece Material Tapping Condition / Tapping Result Remarks ⑨ NominalSize Material Symbol Pilot Hole Size Tapping Length(Hardness)（mm）（mm）*Machine Cutting Speed Feed（m/min）MechanismCuttingOilLifetime(Holes or Pieces) Previous State /Workpiece nameM6 × 1S35C5.112（2D）HorizontalMC7.5SynchronizedNon-watersoluble10,000Bad surface finish* Workpiece name: Shafts M8 × 1.25 S45C 6.8 8（1D） Vertical MC 40 Synchronized Water soluble 9,120 Replaced after tapping 5,200 holes* Workpiece name: Shafts M8 × 1.25 S55C (25HRC) 6.85 12（1.5D） Vertical MC 30 Synchronized Water soluble 2,160 Unstable tool life* Workpiece name: Clutch parts ⑩ M10 × 1.25 S45C (23HRC) 8.8 20（2D） Vertical MC 8 Synchronized Water soluble 2,450 Replaced after tapping 1,600 holes* Workpiece name: Arms M12 × 1.75 S55C (27HRC) 10.4 12（1D） Vertical MC 19 Synchronized Water soluble 2,840 Unstable tool life* Workpiece name: Hub bearings M14 × 1.5 S53C (25HRC) 12.6 14（1D） Vertical MC 32 Synchronized Water soluble 4,430 Replaced due to excessive torque after tapping 3,000 holes* Workpiece name: Hub bearings M14 × 1.5 S55C (23HRC) 12.6 14（1D） Vertical MC 22 Synchronized Water soluble 2,700 Replaced after tapping 2,000 holes* Workpiece name: Hub bearings ⑪ * (D) indicates the ratio of the tapping length to the outside diameter. Examples of machined parts Excellent durability for tapping through holes in medium hard steels for such as hub bearings of bicycles. JIS ②-5