Общий каталог Yamawa 2022 - 2023 - страница 560

⑤ Cemented Carbide Tap Series Overall length L Thread length ℓ Thread + Neck ℓn length Shank dia. Ds Size of square K Length of square ℓk JIS UH-CT Spiral Fluted Taps (for blind hole) ① JIS Carbide taps for ultra hard materials Spiral Fluted Taps (for through hole) ② Specification <1.5D Coating Spiral Pointed Taps (for through hole) ③ Recommended Tapping Speeds depending on Materials Thermal refined steels 調質鋼 〜 5 Hand Taps ( m / min ) ④ 50〜63HRC Product Features ●The UH-CT is designed for tapping SKD and pre-hardened steel 50HRC to 63HRC (Max 63). ●It is produced from a ultra fine grain cemented carbide with superior abrasion Cemented Carbide Taps ⑤ resistance and impact resistance. ●The UH-CT has an improved shank roundness accuracy. ●Recommended tapping length is "Major diameter size x 1.5" or less 5P chamfer for better tool life. ●For the bored hole diameter, the maximum minor diameter of a 6H internal thread diameter maximum value is recommended. Roll Taps Tapping Data ⑥ Tapping Conditions [Ｍ8×1.25] Tool Life 80 Workpiece Material ＳＫＤ１１hardened material (60 HRC) L o a d Me te r （％） 60 60 Bore Diameter φ６．９ UH-CT Holes Tapping Length １6ｍｍ through hole 40 Standard Tapping Speed １．５ｍ/ｍｉｎ （６０ ｒｐｍ） Carbide hard Tap. 8 Holes 20 Special Thread Taps Simple Inspection Tools Ｎ-CT Machinery Type ＣＮC rigid tapping machine ⑦ 0 10 20 30 40 50 60 0 Tapping Fluid Non-water soluble cutting oil Number of tapped holes. 10 20 30 40 50 60 （Num ber of threads tapped. ） UH-CT Ｎ-CT The figure above is a comparison of the number of tapped holes using a standard carbide tap (N-CT) and a The figure above shows the relationship between the number of tapped holes and the load meter (%) of Pipe Taps carbide tap in SKD 11 high hardness quenched steel at 60 HRC. The N-CT tap, had chipped flutes at ⑧ 8 holes. Compared to the N-CT, the UH-CT was able to process 60 holes in ultra high hardness steel. It is the machine when machining tests are conducted up important to watch for a dull drill as it will cause the taps flutes to wear prematurely. The drilling is to 60 holes with UH - CT tap. The numerical value processed at a 6m/min. cutting speed and a 0.04mm/rev. feed which can easily cause work hardening. of the load meter tends to increase as the number of tapped holes increase at 50 completed threads. The cutting edge damage at this point causes the load ＊Bored hole in this test was prepared by using a carbide drill under such condition as could cause no meter to raise quickly beyond 50 tapped holes. As work-hardening. (cutting speed: 6m/min, feed 0.04m/rev.) the number of tapped holes progresses further, the Thread Mills Premium Thread Mills risk of tap breakage is considerable and the load will ⑨ increase, so it is recommended to set the life expectancy at a safe level considering the high hardness of the steel being processed. Selection of hole diameter (reference) Product system table  Unit：mm Unit：mm Dies JIS6H（Level 2） JIS6H（Level 2） SLow Tapping Speed Fast ⑩ Internal Thread Dimeter Internal Thread Dimeter Work piece Work piece Thread Hole Thread Hole Material Material Size Size Hole Hole Size Size Hole Hole 1m/min 3m/min 5m/min 6m/min 15m/min Size Size Size Size 60HRC 60HRC （Max） （Min） （Max） （Min） UH-CT High 55HRC 55HRC High M2 ×0.4 1.65 1.679 1.567 M12×1.75 10.4 10.441 10.106 hardness hardness material 55HRC 55HRC material M2.5×0.45 2.11 2.138 2.013 M12×1.5 10.60 10.676 10.376 EH-CT 45HRC 45HRC M2.6×0.45 2.21 2.238 2.113 M12×1.25 10.90 10.912 10.647 45HRC 45HRC Tempered Tempered Center Drills Centering Tools M3 ×0.5 2.56 2.599 2.459 M14×2 12.1 12.210 11.835 material 25HRC ※ Please use UH-CT, EH-CT with complete EH-HT 25HRC material ⑪ Tool steel SKS・SKD synchronous feed. EH-PO SKS・SKD Tool steel M4 ×0.7 3.40 3.422 3.242 M14×1.5 12.60 12.676 12.376 Alloy steel SCM・SCr SCM・SCr Alloy steel M5 ×0.8 4.30 4.334 4.134 M16×2 14.1 14.210 13.835 1m/min 3m/min 5m/min 6m/min 15m/min * Please use synchronous type tooling for UH - CT / EH - CT. M6 ×1 5.10 5.153 4.917 M16×1.5 14.60 14.676 14.376 M8 ×1.25 6.90 6.912 6.647 M18×2.5 15.7 15.744 15.294 M10 ×1.5 8.60 8.676 8.376 M18×1.5 16.60 16.676 16.376 M10 ×1.25 8.90 8.912 8.647 M20×2.5 17.6 17.744 17.294 JIS M20×1.5 18.60 18.676 18.376 ⑤-27