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 Thread Thread + Neck Shank Shank Size of Length oflengthlengthlengthlengthdia.squaresquareLℓℓnℓsDsKℓk JIS ① HVSP Z-PRO  Spiral fluted Taps for Forged Parts in the Heavy Metalworking Industry. ② Specification Oxide ③ Recommended Tapping Speeds depending on Materials Low carbon steels Medium carbon steels High carbon steels Alloy steels Stainless steels 低炭素鋼 中炭素鋼 高炭素鋼 合金鋼 ステンレス鋼 〜5 〜5 〜5 〜5 〜5 ④ (m/min) (m/min) (m/min) (m/min) (m/min) Product Features ●YAMAWA has designed a flute shape and cutting edge angle to improve the chip ejection properties. ●A heel grind on the rear threads has improved the performance of the tap and eliminated the materials chip ⑤ residue in the threads that is caused on reversal by the tap's end threads. ●With no chips left in the threads, the tapping operation is less likely to chip the flutes or threads of the tap during the tap's reversal. ●There are several full threads after the cutting chamfer and a special heel grind to the balance of the threads to reduce their full thread height, thereby reducing any chance of chipping the flutes. ⑥ Tapping Data ・Improvement of chipped flutes ◎Full Thread Part ◎Chamfer Part Tapping conditions [M36 × 4] Work Piece Material SS400 Conventional Product Conventional Product Chipping Chipping ⑦ Tapping Speed 3m/min Tapping Length 50mm Machinery Type Radial drilling machine HVSP250 Holes HVSP250 Holes Tapping Fluid Non-water soluble cutting oil Ongoing Processing Ongoing Processing No Chipping No Chipping ⑧ ・Compatible with a wide range of workpiece machining. Tapping conditions Excellent Surface Finish Material Recommended Tapping Speed (m/mim) Stainless Steel SUS303/SUS304/SUS316 3〜8 Alloy Steel SCM/SCr 3〜8 ⑨ High Carbon Steel S45C 〜 3〜8 Medium Carbon Steel S25C 〜 S45C 3〜8 Low Carbon Steel 〜 S20C/SS400 3〜8 ⑩ ⑪ JIS ①-23