Общий каталог Yamawa 2022 - 2023 - страница 194

① Spiral Fluted Tap Series for blind hole Overall length L Chamfer+ full thread ℓt Thread length ℓ Thread + Neck ℓn length Shank length ℓs Shank dia. Ds Size of square K Length of square ℓk JIS ZEN-B Spiral Fluted Taps (for blind hole) ① JIS Spiral Fluted Taps for Nickel Base Alloys Spiral Fluted Taps (for through hole) ② Specification Spiral Pointed Taps (for through hole) 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 〜 Hand Taps ( m / min ) ( m / min ) ( m / min ) ( m / min ) ④ 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. Cemented Carbide Taps ●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. Roll Taps Tapping Data ⑥ Tapping Conditions [M6×1] Work Piece Material Hastelloy Ｃ-276 Bored Hole Size φ5.0 ZEN-B Tapping Length 10mm Special Thread Taps Simple Inspection Tools Can Continue ⑦ Tapping Speed 5m/min Machinery Type CNC tapping center General PurposeSP Tapping Fluid Water soluble cutting fluid 0 20 40 60 80 100 120 (Number of holes processed) Pipe Taps 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. Thread Mills Premium Thread Mills There are many kinds of nickel based alloys, but one of the more difficult ones to cut is inconel 718. ⑨ 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. Dies ●The material tends to cause welding on the cutting chamfer and the thread flank surface. The finished surface of the internal ⑩ screw thread can become rough. Center Drills Centering Tools ⑪ JIS ①-159