Play in the rudder bearings not only makes steering uncomfortable, it is often also a sign of advanced wear.
Replacing the bearing bushes only provides a short-term remedy. It is better to change to modern, self-aligning needle bearings. We show you step by step how to convert an old rudder system, what work is required and what it costs.
Sliding bushes as rudder bearings have long been the state of the art and have proven their worth in long keelers or boats with a full skeg. However, modern, free-hanging spade rudders place different demands on the bearings. Due to the unfavourable lever ratios, the rudder stock deforms under load. The rigid plain bearing cannot follow the bends of the shaft, tilts and becomes stiff, which not only increases wear but also causes problems for the helmsman.
Converting to self-aligning needle bearings not only eliminates the play permanently, as the needle bearings sit in movable ball cups, they can adapt to the bends of the shaft and no longer jam even under extreme loads. Steering becomes easier and feedback from the rudder is improved.
More about the conversion of the rudder bearing in issue 19/07 from 5 September at the newsstand
Hauke Schmidt
Test & Technology editor
