It is a device that is pre-installed at the factory. The advantage is that once this device is installed you can make both a “J” chamfer and a normal one.
The values are as follows:
Thickness max. sheet thickness is 70mm with the standard machine, 100mm with special configuration.
The chamfer angle at J is 15-30 °.
Depth max. chamfering in J in several passes of 57.5 mm at 15º and 49.8 mm at 30º.