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 (value varies depending on the type of thread and material being threaded)
THE ROLLING THREAD
This kind of tapping doesn’t cut the thread but rolls it into the pre-hole. This is a guarantee of better resistance to efforts and breakings.
Thanks to these rolling thread’s properties it’s no more necessary to create long threads for having better keeping, but it’s even possible to have shorter threads, sparing in die strokes and extending 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 = No. of inlet threads Y = Run one lap CF = Thread stroke |
| CF = Nm x Y | Nm = Total revolutions of the male required to thread |