Обший каталог Yamawa 2016 - 2017 - страница 166

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Cemented Carbide Tap Series Spiral Fluted Taps (for blind hole) UH-CT Carbide Taps for Ultra Hard Materials Spiral Fluted Taps (for through hole) Specification Coating 1.5D 1.5D Spiral Pointed Taps (for through hole) Recommended Tapping Speeds depending on Materials Hardened steel HRC IS H 〜5 (m/min) Hand Taps For icon explanation, refer to P.50 Product features ●Ultra fine grain carbide alloys with superior wear resistance and shock resistance are adopted. ●By using the tap blanks in which both the run-out tolerance and the shank concentricity are improved, the high accuracy in screw Cemented Carbide Taps threads can be obtained. ●Possible for tapping heat treated tool steels and hardened steels which hardness ranges in 55-60HRC (Maximum hardness 63HRC). ●Thread length should be less than 1.5D. Considering the tool life, the number of chamfer threads is 5. ●For bored hole diameter, maximum of the minor diameter tolerance of 6H internal threads is recommended. Roll Taps Tapping data Tapping condition [ M8×1.25 ] 〈Tapping Torque〉 Work material Heat treated tool steel UH-CT oles （60HRC） 80 Special Thread Taps Simple Inspection Tools Bored hole size 6.9 mm Load meter (%) Standard Tapping length 12mm, through hole 60 carbide tap 8 holes （N-CT-FC） Machine CNC rigid tapping machine 0 10 20 30 40 50 60 Tapping speed 1.5m/min（60rpm） 40 Number of tapped holes UH-CT Ｎ-CT-FC insoluble oil 20 Tapping fluid (with extreme pressure additive) 0 Pipe Taps 10 20 30 40 50 60 Number of holes Upper graph shows comparison data in tapping heat-treated tool steel by the standard Upper graph shows the relation between the number of carbide tap（N-CT）and by the carbide tap for high hardness steel（UH-CT）Chipping tapped holes and the load meter data of the machine on the occurred in 8th tapping with N-CT. 60 hole tappings were obtained with UH-CT. tapping test up to 60 holes with UH-CT tap.　Percentage Note: It is necessary to change the drill much earlier because the damage on the edge of of load meter figure tends to increase after tapping 50 drill is larger when drilling high hardness steels. holes. This means from this cutting area the damage on the Thread Mills tool's cutting edge becomes larger rapidly. If we continue ※Bored hole in this test was prepared by using a carbide drill under such condition as could cause no work-hardening (cutting tapping further from this area, we might have tap breakage. speed 6m/min, feed 0.04mm/rev.). It is important to pay special attention to the number of tapping holes (tool life) from the view point of safety when tapping high hardness steel materials. Dies Recommended bored hole size (for reference) Application unit : mm unit : mm Minor dia. of ISO 6H class Minor dia. of ISO 6H class pplic tion Size Recommended internal thread Size Recommended internal thread Tapping speed bored hole size bored hole size Workpiece 1m/min 3m/min 5m/min 6m/min 15m/min Max. Min. Max. Min. Center Drills M2 X0.4 1.65 1.679 1.567 M12X1.25 10.9 10.912 10.647 60HRC M2.5X0.45 2.1 2.138 2.013 M14X2 12.2 12.210 11.835 55HRC UH-CT M14X1.5 12.6 12.676 12.376 Hardened M2.6X0.45 2.2 2.238 2.113 steel M3 X0.5 2.55 2.599 2.459 M16X2 14.2 14.210 13.835 55HRC 45HRC EH-CT M4 X0.7 3.4 3.422 3.242 M16X1.5 14.6 14.676 14.376 M5 X0.8 4.3 4.334 4.134 M18X2.5 15.7 15.744 15.294 Heat 45HRC treated materials EH-ＨＴ 25HRC M18X1.5 16.6 16.676 16.376 M6 X1 5.1 5.153 4.917 Tool steels SKS・SKD EH-PO Centering Tools M8 X1.25 6.9 6.912 6.647 M20X2.5 17.7 17.744 17.294 Alloy steels SCM・SCr M10X1.5 8.6 8.676 8.376 M20X1.5 18.6 18.676 18.376 ※Please use feedrate/rotation synchronized tapping M10X1.25 8.9 8.912 8.647 attachments for UH-CT/EH-CT. M12X1.75 10.4 10.441 10.106 M12X1.5 10.6 10.676 10.376 DIN CT-5 162