Обший каталог Yamawa 2016 - 2017 - страница 166

Cemented Carbide Tap Series
Spiral Pointed Taps Spiral Fluted Taps Spiral Fluted Taps
(for blind hole)


UH-CT
Carbide Taps for Ultra Hard Materials
Specification
(for through hole)


Coating 1.5D 1.5D

Recommended Tapping Speeds depending on Materials
(for through hole)


Hardened steel
HRC
IS H
〜
5
(m/min)
For icon explanation, refer to P.50
Hand Taps


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
threads can be obtained.
Cemented
Carbide Taps


●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〉
Heat treated tool steel
Work material
UH-CT
oles （60HRC） 80
Bored hole size 6.9 mm
Special Thread Taps
Pipe Taps Simple Inspection Tools


Standard 60
Load meter (%)


carbide tap 8 holes Tapping length 12mm, through hole
（N-CT-FC）
Machine CNC rigid tapping machine
0 10 20 30 40 50 60 40
Number of tapped holes Tapping speed 1.5m/min（60rpm）
insoluble oil 20
UH-CT Ｎ-CT-FC
Tapping fluid (with extreme pressure
additive) 0
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
tool's cutting edge becomes larger rapidly. If we continue
Thread Mills


※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
pplic tion
Minor dia. of ISO 6H class Minor dia. of ISO 6H class
Recommended internal thread Recommended internal thread Tapping speed
Size Size 1m/min 3m/min 5m/min 6m/min 15m/min
bored hole size bored hole size Workpiece
Max. Min. Max. Min.
60HRC
UH-CT
Center Drills


M2 X0.4 1.65 1.679 1.567 M12X1.25 10.9 10.912 10.647
M2.5X0.45 2.1 2.138 2.013 M14X2 12.2 12.210 11.835 55HRC
Hardened
M2.6X0.45 2.2 2.238 2.113 M14X1.5 12.6 12.676 12.376 steel
55HRC
M3 X0.5 2.55 2.599 2.459 M16X2 14.2 14.210 13.835 EH-CT
45HRC
M4 X0.7 3.4 3.422 3.242 M16X1.5 14.6 14.676 14.376
Heat 45HRC
M5 X0.8 4.3 4.334 4.134 M18X2.5 15.7 15.744 15.294
EH-ＨＴ
treated
materials 25HRC
M6 X1 5.1 5.153 4.917 M18X1.5 16.6 16.676 16.376 Tool steels SKS・SKD
Alloy steels SCM・SCr
EH-PO
Centering Tools


M8 X1.25 6.9 6.912 6.647 M20X2.5 17.7 17.744 17.294
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