Общий каталог Yamawa 2022 - 2023 - страница 258

② Spiral Fluted Tap Series for through hole Overall length L Thread length ℓ Thread + Neck ℓn length Shank length ℓs Shank dia. Ds Size of square K Length of square ℓk JIS MHSL Spiral Fluted Taps (for blind hole) ① JIS Spiral Fluted Taps for Carbon Steels of Medium Hardness, Through Hole Use (with LH Spiral Flutes) Spiral Fluted Taps (for through hole) ② Specification <2D Coating Spiral Pointed Taps (for through hole) 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 〜 〜 〜 Hand Taps ( m / min ) ( m / min ) ( m / min ) ④ 25〜35HRC Product 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 Cemented Carbide Taps in the medium tapping speed range. Also, the MHSL improves the internal threads surface finish. ⑤ Improved chip ejection! Tapping Data Tapping Conditions [M12×1.25] Workpiece Material S53C (forged) / Hub bearing MHSL Bored Hole Size φ10.8 Roll Taps Can Continue ⑥ Tapping Length 12mm through hole Competitors Tapping Speed 30m/min Spiral Point Tap Horizontal machining center 0 500 1000 1500 2000 2500 3000 Machine (fully synchronized feed) （Number of holoes processed.） Tapping Fluid Water soluble cutting fluid Special Thread Taps Simple Inspection Tools Tapping Conditions [M12×1.25] ⑦ Enhanced wear resistance Improved surface finish Workpiece Materials S53C（25HRC） Tapping Length 13mm MHSL has high The previous model caused MHSL cutting performance, abnormal noise Initial tapping providing excellent surface finish of Tapping Speed 30m/min after tapping PO bright finish Internal thread internal threads. 1,239 holes. Initial tapping Machine Machining center Internal thread Pipe Taps Tapping Fluid Water soluble cutting fluid Left-hand spiral Left-hand spiral ⑧ MHSL With surface With surface 2,800 holes treatment treatment Still works 1,239 holes Initial tapping well Tapping examples on the market Worn Internal thread MHSL Workpiece Material Tapping Condition / Tapping Result Remarks Nominal Material Symbol Pilot Hole Size Tapping Length Machine Cutting Speed Feed Cutting Lifetime Previous State / Thread Mills Premium Thread Mills Size (Hardness) （mm） （mm） * （m/min） Mechanism Oil (Holes or Pieces) Workpiece name ⑨ Horizontal Non-water Bad surface finish M6 × 1 S35C 5.1 12（2D） 7.5 Synchronized 10,000 MC soluble * Workpiece name: Shafts Vertical Replaced after tapping 5,200 holes M8 × 1.25 S45C 6.8 8（1D） 40 Synchronized Water soluble 9,120 MC * Workpiece name: Shafts Vertical Unstable tool life M8 × 1.25 S55C (25HRC) 6.85 12（1.5D） 30 Synchronized Water soluble 2,160 MC * Workpiece name: Clutch parts Dies Vertical Replaced after tapping 1,600 holes M10 × 1.25 S45C (23HRC) 8.8 20（2D） 8 Synchronized Water soluble 2,450 ⑩ MC * Workpiece name: Arms Vertical Unstable tool life M12 × 1.75 S55C (27HRC) 10.4 12（1D） 19 Synchronized Water soluble 2,840 MC * Workpiece name: Hub bearings Vertical Replaced due to excessive torque after tapping 3,000 holes M14 × 1.5 S53C (25HRC) 12.6 14（1D） 32 Synchronized Water soluble 4,430 MC * Workpiece name: Hub bearings Vertical Replaced after tapping 2,000 holes M14 × 1.5 S55C (23HRC) 12.6 14（1D） 22 Synchronized Water soluble 2,700 MC Center Drills Centering Tools * 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