Общий каталог Yamawa 2022 - 2023 - страница 382

③ Spiral Pointed 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 ZEN-P Spiral Fluted Taps (for blind hole) ① JIS Spiral Pointed Taps for Nickel Base Alloys Spiral Fluted Taps (for through hole) ② Specification Spiral Pointed Taps (for through hole) Nitride＋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 10〜 5 10〜 5 10〜 5 10 〜 Hand Taps ( m / min ) ( m / min ) ( m / min ) ( m / min ) ④ Product Features ●T  he tap is produced from high grade powder high speed steel material that has excellent heat resistance and abrasion resistance properties. ●Cutting edge geometry is designed to accommodate for thread shrinkage and the high temperature of difficult to machine materials. Cemented Carbide Taps ●Utilizes the appropriate flute shape and rake angles for nickel base alloy to allow a smooth discharge of chips. ⑤ ●YAMAWA uses the ideal surface treatment to prevent chip welding and abrasion. ●Compensating for diameter shrinkage of the internal screw thread, the tap is produced moderately oversize. Tapping Data Roll Taps ⑥ Tapping Condition [M6×1] Workpiece Material Hastelloy C-276 Bored Hole Size φ5.0 ZEN-P Tapping Length 10mm Can Continue Tapping Speed 5m/min Special Thread Taps Simple Inspection Tools ⑦ Machinery Type CNC tapping machine General Purpose PO Tapping Fluid Water soluble cutting fluid 0 50 100 150 200 250 （Number of holes processed） Pipe Taps ⑧ Characteristics of nickel base alloys. ●Nickel based alloys have much better corrosion resistance 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. There are many kinds of nickel based alloys, but one of the more difficult ones to cut is inconel 718. Thread Mills Premium Thread Mills ⑨ Types of problems tapping nickel based alloys. ●Nickel based alloys have a high temperature strength and thermal diffusion is small. Abrasion occurs quickly on the taps cutting edge. ●The internal thread diameters tend to spring back and may cause shrinkage and the tap may be crimped causing breakage. Dies ●The material causes chip welding on the cutting chamfer and the flank surface of the tap's threads. The finished surface of ⑩ the internal screw thread produced from nickel based alloys can become rough and coarse. Center Drills Centering Tools ⑪ JIS ③-85