Hardened steel hemming bobbins with female M6 attachment
To be applied externally with respect to the hemming bobbin, it keeps the cartridge case aligned during the hemming phase.
Applicable to hemming bobbins from 27mm diameter
The flattener is a fundamental tool for stabilizing the plastic of the case before the passage of the rim, this operation is used to ensure that the rim does not undergo changes in height once the cartridge is finished.
The coining device is used after the roll crimping of the cartridge, like all the other coils it must be adjusted precisely, and is used to lengthen the taper of the engraving folds.
With this step no central holes remain in the closure, and you do not see the incision marks on the inside of the hemmed edge.