A baler including a bale chamber a plunger to compress crop material in the bale chamber to form a bale a plurality of knotters a needle yoke with a plurality of needles to deliver a plurality of lower strands through the bale chamber to the plurality of knotters a tucker arm shaft carrying a plurality of tucker arms to deliver a plurality of upper strands to the plurality of knotters a driving shaft located above the bale chamber and extending in a traverse direction of the baler wherein the tucker arm shaft extends parallel to the driving shaft a tucker arm coupling device to covert the rotation of the driving shaft into a rotation of the tucker arm shaft a needle coupling device to convert a rotation of the driving shaft into a movement of the needle yoke from a rest position to a twine delivery position and back.
