ADVANTAGES
- Costs reduction for blank and threaded pieces
- Elimination of costly recovery operations
- Low-invenience, high-yield
- The rolled thread acquires a higher breaking strength than the thread obtained by chip removal
- Yield of each male between 50000 and 300000 pieces (value varies according to the type of thread and material to be threaded)
- Maximum speed 200 strokes/min (variable value depending on the type of thread and material to be threaded)
THE ROLLING THREAD
The rolled thread features uncut fibers that are cold-formed, thus guaranteeing better fatigue and tensile strength.
Thanks to these properties of the thread-rolled screw, we can state that it is no longer necessary to create long threads to ensure a better hold; indeed, it is thus possible to shorten them, saving die stroke and tap life.
The following formula can be used to calculate the required thread depth:
h = 0.9 x D (thread Ø)
LUBRIFICATION
In order to get the best tap life we suggest to use an Intercom specific oil for rolling tap.
Formulas for calculating the thread stroke
| N=A/p | A = Height of the thread N = Number of threads P = Thread pitch |
| Nm = N+K | K = Number of thread starts Y = Run one lap CF = Thread stroke |
| CF = Nm x Y | Nm = Total revolutions of the male required to thread |