1 1/8 AXLE COLLAR

Function and technical context

The 1 1/8" shaft collar is a retaining and positioning element that works directly on the boat's drive shaft, keeping it correctly aligned and preventing unwanted axial displacement. It is part of the transmission system, acting as a mechanical stop that guarantees that the shaft remains in its working position during rotation. Its correct operation is essential to preserve the integrity of the stuffing box, the shaft bearings and the coupling with the propeller; If this component fails or shifts, water entry through the hull, excessive vibration, and premature wear of adjacent elements may occur. The 1 1/8" dimension corresponds to the shaft diameter for which it is designed, and it is essential to respect this measurement in any replacement to ensure a precise and secure fit.

When to replace this part?

The most common symptoms of a damaged or out-of-position shaft collar are the appearance of noticeable axial play in the shaft, unusual vibrations transmitted to the hull during navigation and, in advanced cases, water leaks through the stuffing box caused by the displacement of the shaft. It is recommended to inspect the collar at each docking or seasonal maintenance, verifying that the fixing screw maintains adequate tightening and that there are no signs of corrosion, deformation or wear on the seat. Replacing this component preventively in the event of any sign of looseness is much more economical than facing an emergency repair due to water ingress or damage to the transmission system.

Compatibility table