Carbide tap, carbide spiral flute taps
Generally speaking, the larger the helix angle, the better the chip
removal performance. Carbide spiral flute tap is suitable for blind
hole tapping, however it is not recommended for through hole
tapping. The materials used for super pressure facilities are
characterized by high strength and high toughness,to tap threaded
holes on such materials,the traditional straight flute tap doesn’t
not work, however, the spiral flute tap do, it solves the problem
of tap large threaded holes on these difficult-t- machine
materials.
Carbide forming taps with male center:
| Thread size | Tap limit | Lc | L | f1 | d | Flutes |
| M3*0.5 | P3 | 2.5P | 50 | 12 | 4 | 3 |
| M4*0.7 | P3 | 54 | 14 | 5 |
| M5*0.8 | P3 | 62 | 16 | 5.5 |
| M6*1.0 | P3 | 62 | 19 | 6 |
| M8*1.25 | P4 | 75 | 22 | 6.2 |
| M10*1.5 | P4 | 75 | 24 | 7 |
| M10*1.25 | P4 | 75 | 24 | 7 |
| M12*1.75 | P4 | 82 | 29 | 8.5 |
| M12*1.5 | P4 | 82 | 29 | 8.5 |
| M12*1.25 | P4 | 82 | 29 | 8.5 |
product picture:
Same as the carbide cutting tools gradually replaces the high speed
steel tools in turning, cemented carbide taps also begin to be more
and more used for thread hole tapping. Compared with HSS taps,
cemented carbide taps have high hardness and brittleness, so there
is a problem of chip removal when tapping with cemented carbide
taps. In spite of this, cemented carbide taps are super good for
tapping cast iron and aluminum alloy materials,tap damage form is
mainly mechanical wear out. Because a large number of cast iron and
aluminum alloy parts are applied in the automotive industry,
carbide taps are used more and more wider to obtain long tool life.
In the automotive industry, the reduction of the tool replacing
time is obviously an important factor, and the long tool life of
cemented carbide taps will minimize the time for replacing taps.
The performance of coated cemented carbide taps with small helix
angle is very good to tap aluminum alloy workpiece with silicon
content of 8% - 12%. The tap made of sub-micron grain cemented
carbide can increase the toughness without reducing its hardness.
It is very good in tapping hardened steel, plastics and difficult
to machine nickel base alloy.
