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The BWL – bronze water lubricated sterntube is intended for use on wooden and GRP hulls, such as fishing boats, cargo dhows, passenger ferries and sailing vessels. The outboard bearing housing and the inboard gland/bearing are usually fixed to the hull with bronze coachscrews. A typical installation is shown in the diagram. The use of Aqualube water lubricated rubber bearings helps to cushion vibration loads, and also provides excellent bearing life..

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