Общий каталог Yamawa 2022 - 2023 - страница 556

⑤ Cemented Carbide Tap Series Overall length L Thread length ℓ Shank dia. Ds Size of square K Length of square ℓk JIS EH-CT Spiral Fluted Taps (for blind hole) ① JIS Carbide Taps for 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 45〜55HRC Product Features ●Ideal for high hardness steel tapping from 45 to 55 HRC. For hot mold SKS 3 and SKD 11. ●The ultra fine grain cemented carbide is superior in abrasion resistance and impact resistance. ●Better concentricity improves the accuracy of the entire tap and roundness of the shank. Cemented Carbide Taps ●Recommended tapping length is "Major diameter size x 1.5" or less 5P chamfer for better tool life. ⑤ ●For the bored hole diameter, the maximum minor diameter of a 6H internal thread diameter maximum value is recommended. Tapping Data [ M8×1.25 ] Roll Taps Tapping Data 〈Torque line in the different bored hole size〉 ⑥ Bored Hole Size 6.8mm(Actual 6.79mm) 6.9mm(Actual 6.89mm) Thread Engagement Ratio 89％ 81％ EH-CT still running 1000 900 torque（Ｎ・㎝） 1000 900 thrust（Ｎ） 800 800 700 700 Previous Breakage 600 500 600 500 （Carbide tap） Beginning 400 300 400 300 200 200 Special Thread Taps Simple Inspection Tools 0 50 100 150 200 250 300 350 400 (holes) 100 0 100 0 ⑦ -100 0 2 4 6 8 10 12 -100 0 2 4 6 8 10 12 Work Type Hot forged die steel（SKD61） Torque -200 -200 EH-CT still Material Hardness 50HRC still running and Torque(average) 770N.cm Torque(average) 680N.cm EH-CT 1000 1000 Tapping Speed 6m/min running Thrust Lines 900 800 900 800 Previous Breakage After 700 700 Feed tap） （Carbide Full rigid 50 600 500 600 500 Tapping Fluid Breakage Non-water soluble cutting oil 400 400 Previous Holes 300 300 （Carbide tap） 0 50 100 150 200 250 300 350 400 (holes) 200 200 Tapping 100 100 Pipe Taps 0 0 0 50 100 150 200 250 300 350 400 (holes) -100 0 2 4 6 8 10 12 -100 0 2 4 6 8 10 12 ⑧ -200 -200 EH-CT still Torque(average) 890N.cm Torque(average) 780N.cm running Tapping condition Previous Breakage Work Material DAC（equivalent to SKD61）50HRC （Carbide tap） Tapping Speed 6m/min 0 50 100 150 200 250 300 350 400 (holes) Feed Rigid Thread Mills Premium Thread Mills Work Type Stainless steel for plastic die（SUS420J2） Tapping Fluid Non-water soluble cutting oil ⑨ Material Hardness 52HRC Bored hole size enlarged by 0.1mm can reduce the tapping resistance Tapping Speed 6m/min Feed Full rigid torque by 10%. Tapping Fluid Non-water soluble cutting oil In tapping the material of high hardness, it is recommendable to make the bored hole size as large as possible. Dies Recommended bored hole size (for reference) Application ⑩  unit : mm SLow Tapping Speed Fast Minor Dia. of JIS 6H Class Internal Screw Recommended Bored Thread Size Workpiece 1m/min 3m/min 5m/min 6m/min 15m/min Workpiece Hole Size Max. Tolerance Min. Tolerance 60HRC 60HRC M3 × 0.5 2.56 2.599 2.459 High 55HRC UH-CT 55HRC High M4 × 0.7 3.40 3.422 3.242 Hardness hardness Materials materials Center Drills Centering Tools 55HRC 55HRC M5 × 0.8 4.30 4.334 4.134 EH-CT ⑪ 45HRC 45HRC M6 × 1 5.10 5.153 4.917 45HRC 45HRC Heat Treated Heat Treated M8 × 1.25 ※Please use feedrate/ 6.90 6.912 6.647 Materials 25HRC rotation synchronized EH-HT 25HRC Materials tapping attachments for Tool Steels SKS・SKD EH-PO SKS・SKD Tool Steels M10 × 1.5 8.60 8.676 8.376 Alloy Steels SCM・SCr UH-CT/EH-CT. SCM・SCr Alloy Steels M12 × 1.75 11.4 10.441 10.106 1m/min 3m/min 5m/min 6m/min 15m/min JIS ⑤-23