Sheave, Pulley Wheel (13A16)
A nearly intact sheave or pulley wheel from a large block found in the Hamoaze. The sheave is made from lignum vitae, a hard and oily wood that preserves well underwater, and a brass coak or bearing in the centre. The coak is stamped with the broad arrow indicating that it was manufactured for the Royal Navy.
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Images
Sheave or pulley wheel |
Detail of copper alloy coak or bearing |
Double pulley block with two sheave wheels |
References