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 SP Spiral Fluted Taps ② Specification ③ Recommended Tapping Speeds depending on Materials Medium carbon steels High carbon steels 中炭素鋼 高炭素鋼 5〜10 5〜10 ④ (m/min) (m/min) Product Features ●The spiral flutes of the SP tap pull the small continuous curly chips back towards the tapping chuck and prevents chips from clogging in the hole. These taps are ideal for blind hole tapping. ⑤ ●These taps cut easily into softer materials.●Intermittent cutting into pilot holes with a keyway or grooves is possible. ●The flute strength is inferior to the HT tap. The HT flute shape is more suitable for high hardness materials. Chip evacuation with a SP tap. The difference between a SP tap and a + SP tap ⑥ SP For low speed machining on drilling +SP Medium speed machining/Synchronous feed machines and machining centers. tapping is recommended on Machining Centers. Standard tap series SP (for blind holes). Plus series + SP for blind holes. ⑦ Old name New Name Size Range Old Name New Name Size Range N-SP SP M1.2 〜 M64 N+SP +SP M2 〜 M12 Effective tapping on drill machines. Effective for use with synchronous feed (rigid) tapping on CNC machining centers. ⑧ * Both are general purpose spiral flute taps developed for varying tapping environments.Speed chart Slow Tapping Speed Fast Hard Hard 5m/min 10m/min 15m/min 20m/min Work Piece Material Perfect synchronous feed territory Work Piece Material ⑨ Alloy SCMSteelSCr SCM AlloySCrSteel High S55C S55C High Carbon Carbon Steel S45C S45C Steel S45C S45C Medium Medium Carbon Carbon ⑩ Steel S30C SP +SP SteelS30C S30C S30C Low Low Carbon Carbon Steel Steel ⑪ SS400Soft SS400 Soft 5m/min 10m/min 15m/min 20m/min Tapping speed range by tap series. JIS ①-35