COLLAR FOR 100mm SHAFT.

Function and technical context

The 100 mm shaft collar is a fastening and positioning element that works directly on the boat's drive shaft, preventing unwanted axial displacement and maintaining correct alignment between the engine and propeller. It is part of the propulsion transmission system, acting as a precision stop that guarantees that the axis remains in its working position under the push and pull loads generated during navigation. Without this component correctly installed, the shaft can suffer longitudinal movements that transmit irregular forces to the stern tube bearing, the stuffing box and the coupling itself, accelerating the wear of the entire drive assembly. Its function is critical to maintain the mechanical integrity of the axle line and prolong the useful life of adjacent elements.

When to replace this part?

The most common symptoms of a deteriorated or poorly adjusted axle collar include abnormal vibrations noticeable in the hull, metallic noise in the area of ​​the axle during acceleration or reverse, and visible axial play when manually moving the axle with the engine off. It is recommended to inspect the collar during each seasonal maintenance, checking the absence of corrosion, cracks or looseness in the fixing screws, since humidity and cyclic stresses can compromise its tightness over time. Replacing this component preventively in the event of any sign of wear avoids more costly breakdowns in the axis line and possible navigation stops.

Compatibility table