COLLAR SHAFT 22mm.

Function and technical context

The 22mm shaft collar is an axial positioning and retaining element that works directly on the boat's drive or tail shaft, keeping it in its correct position within the housing or propulsion assembly. Its mission is to prevent longitudinal displacement of the shaft, ensuring that the propeller and associated components maintain the precise alignment necessary for efficient power transmission. When this component degrades or fails, the shaft can suffer excessive axial play, causing abnormal vibrations, premature bearing wear and, in severe cases, damage to the stuffing box or shaft seal that can compromise the tightness of the hull. It is, therefore, a critical piece within the transmission system of any boat with an external axle of 22 mm in diameter.

When to replace this part?

The most common symptoms of a worn or damaged shaft collar are unusual vibrations in the shaft during navigation, metallic noises from the transmission area, and noticeable axial movement when manually pushing or pulling the shaft with the engine stopped. It is recommended to inspect the collar at each docking or seasonal maintenance, paying special attention to signs of corrosion, cracks or deformation of the ring. Replacing this component preventively in the event of any sign of axial play avoids higher-cost secondary damage to bearings, stuffing boxes and the shaft itself.

Compatibility table