The shafts equipped with these long keys have been developed by us to be used with cores of any type of material. They perfectly center entire or reels cut into two parts without having to use costly pre-centering systems.
For optimal centering, the shaft must be equipped with at least three of these key rows with long keys and it’s possible to alternate them with key rows equipped with the usual black keys to avoid any axial movement of the reels.
Suitable for cardboard cores if equipped with long self-centering aluminium keys, the shafts can be also used with steel cores adding a steel square insert into the long aluminium keys.
These shafts are suitable for entire rolls or cut in two rolls.
Inflated to 6 bar, these shafts are able to transmit a torque of 400 daNm per linear meter of 6” cardboard core.