Thanks to the special tooth design, the contact surface between the grids and the core teeth increases proportionally to the torque exerted, so that the same contact pressure is maintained at all times. Since the contact is made over several teeth, the torque is efficiently absorbed, thus avoiding any damage.
There are no reaction forces on the shafts.
The spring always works in the direction of the material fibres, within its elastic range.
More information at: www.cmd-couplings.com