Общий каталог Yamawa 2022 - 2023 - страница 194

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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 ① Spiral Fluted Tap Series for blind hole Overall Chamfer+ Thread Thread + Neck Shank Shank Size of Length oflengthfull threadlengthlengthlengthdia.squaresquareLℓtℓℓnℓsDsKℓk JIS ① ZEN-B Spiral Fluted Taps for Nickel Base Alloys ② Specification Oxide ③ Recommended Tapping Speeds depending on Materials Low carbon steels Medium carbon steels Stainless steels Nickel base alloys 低炭素鋼 中炭素鋼 ステンレス鋼 ニッケル基合金 5〜15 5〜15 5〜15 5〜10 ④ (m/min) (m/min) (m/min) (m/min) Product Features ●T he tap is produced from a high grade powder high speed steel that is excellent for heat resistance and wear resistance. ●The optimum thread relief is adopted in consideration of the shrinkage and cutting heat for Nickel Base Alloys. ●The ZEN-B has a flute design for nickel base alloy to smooth the discharge of chips. ⑤ ●Optimum surface treatment is applied to prevent welding. ●Considering the shrinkage of the internal screw thread, the tap is produced to a moderate oversize condition. ⑥ Tapping Data Tapping Conditions [M6×1] Work Piece Material Hastelloy Ｃ-276 Bored Hole Size φ5.0 ZEN-B Tapping Length 10mm ⑦ Tapping Speed 5m/min Can Continue Machinery Type CNC tapping center General PurposeSP Tapping Fluid Water soluble cutting fluid 0 20 40 60 80 100 120 (Number of holes processed) ⑧ Characteristics of nickel base alloys ●Nickel based alloys have much better corrosion and heat resistance than steel. In general, nickel based alloys are much more difficult to process than steels and stainless steels. Nickel based alloys include A286, inconels, hastelloys, waspaloys and more. ⑨ There are many kinds of nickel based alloys, but one of the more difficult ones to cut is inconel 718. Types of tapping problems ●Nickel based alloys have high temperature strength and the thermal diffusivity is small so, abrupt abrasion occurs on the tap. ●The material tends to spring back so, internal threads may shrink or the tap may be crimped causing breakage. ⑩ ●The material tends to cause welding on the cutting chamfer and the thread flank surface. The finished surface of the internalscrew thread can become rough. ⑪ JIS ①-159