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Tooth Discs – Hirth Joint

Tooth Discs – Hirth Joint

Design your own clutch with our Hirth Coupling

Toothed Discs – Hirth Coupling are used to connect two pieces of a shaft and are characterized by conical teeth that engage each other on the end faces of each half shaft.


Toothed Discs – Hirth Coupling are used to connect two parts of a shaft and are characterised by conical teeth that are coupled to each other on the end faces of each half shaft.

Hirth joints consist of radial teeth formed by milled or ground grooves in the end face of a cylindrical shaft. The teeth mesh around a ring, since the torsional capacity of the teeth increases with their diameter. This ring is arranged to be in the maximum diameter possible for the available space. The centre of a shaft is not serrated, as this would add little torque to the coupling and the increasingly narrow teeth would not be practical for cutting.

The coupling of the Toothed Discs – Hirth Coupling is defined by the number of teeth, the outer diameter of the cylindrical feature, the bottom angle of the grooves (to the axis of the cylindrical feature) and their depth. Hirth joints are designed as mating pairs and, unlike splines, there is no standardised sizing system for them.

Using two clutch discs from our NE-CD pneumatic clutch, you can design your own simple and inexpensive clutch.

Each disc can house two bearings that guarantee a good alignment between both discs, a very important factor in this type of mechanism.

In addition, a set of positional discs can be obtained when it is necessary to maintain a synchronism between both discs.

For more information about the products we have at EIDE, do not hesitate to contact with us.

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