Nautical Term: Spectacle frame
Definition of Spectacle frame
A spectacle frame, in the context of a twin-screw vessel, refers to a single casting that holds and supports the bearings of the propeller shafts on each side of the centerline. This structure consists of arms of pear-shaped sections that extend outboard from the vessel’s sides to bosses, which house the bearings. The spectacle frame is commonly used in large merchant vessels as a replacement for shaft struts or brackets.
For example, imagine a large container vessel in the middle of the Atlantic Ocean. This vessel is equipped with twin screw propellers, which are supported by a spectacle frame. This spectacle frame ensures that the bearings of the propeller shafts are securely supported and do not wear out prematurely, allowing the vessel to continue its journey safely and efficiently.
Explore other nautical terms:
