Общий каталог Yamawa 2022 - 2023 - страница 186

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 ZET-B Spiral Fluted Taps (for blind hole) ① JIS Spiral Fluted Taps for Titanium Alloys Spiral Fluted Taps (for through hole) ② Specification Spiral Pointed Taps (for through hole) Nitride ③ Recommended Tapping Speeds depending on Materials Titanium alloys チタン合金 5 10〜 Hand Taps ( 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 cutting edge geometry helps prevent material shrinkage. The the spiral flute design helps pull the chips ou of the hole to Cemented Carbide Taps allow the cutting heat to be carried out. ⑤ ●Appropriate flute shape for titanium alloy is utilized and the ejection of the chips is smooth. ●A nitride surface treatment is performed for added wear resistance. ●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 Ti-6Aℓ-4V Bored Hole Size φ5.0 ZET-B Tapping Length 12mm Special Thread Taps Simple Inspection Tools Can Continue ⑦ Tapping Speed 8m/min Machiery Type CNC tapping center General PurposeSP Tapping Fluid Water soluble cutting fluid 0 20 40 60 80 100 （Number of holes processed) Pipe Taps ⑧ Characteristics of titanium alloy It is mainly composed of titanium that has a high strength and is light weight. It has excellent heat resistance. There are various types of titanium alloys such as Ti - 5Aℓ - 2.5Sn, Ti - 5Ta, and the most popular Ti - 6Aℓ - 4V which is commonly used due to its Thread Mills Premium Thread Mills good characteristics. ⑨ Examples of problems in tapping ●Titanium alloys have high temperature strength and the thermal diffusion is small, so abrupt abrasion occurs on the tap. Dies ●The spring back on internal screw threads may cause diameters to shrink and the tap may be crimped causing breakage. ⑩ ●Chip welding occurs easily on the cutting chamfer of the tap and the threads flank surface. The finished thread surface of the internal screw thread also becomes rough and coarse. Center Drills Centering Tools ⑪ JIS ①-151