Page 50 - BlueFastening-Systems_Brochure_07192017

TAPTITE 2000® – Thread-rolling in metals

Application in cast aluminium

Torque [Nm] Md-TT2k[Nm] Power take-off gears
Md-Round [Nm]
Fv-TT2k [kN] Screw fastening into precast core holes in aluminium
Fv-Round [kN] housings made with TAPTITE 2000® M8 – 10.9

Influence of screw's cross-section on tap-
ping torque and preload force

For thread-tapping fastenings in GD-AlSi9Cu3 (Fe)
a round screw cross-section generated a tapping
torque MF round of 25.7 Nm. Because of the small
difference with the tightening torque MA = 34
Nm the preload force Fv-round amounted to only
7.2 kN. At 19.1 kN TAPTITE 2000® with its trilobular
screw geometry, achieved a much higher FV-TT2000
preload force with a tapping torque TT2000 of 13.55
Nm and the same tightening torque.
Consequently the trilobular TAPTITE 2000® SPA™
has an advantage over tapping screws with a round
cross-section – Due to the lower tapping torques
and little spread, TAPTITE 2000® generates preload
forces at a higher level with very much less preload
force spread.

Angle [°]

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