Windshaft
Encyclopedia
The windshaft is a part
Mill machinery
This article covers the various major pieces of mill machinery to be found in windmills, watermills and horse mills. It does not cover machinery found in modern factories.-Watermill machinery:Axle...

 in a wind mill that carries the sails and also the brake wheel (Smock and Tower mills, and in some Post mills) or the head wheel and tail wheel in a Post Mill. Windshafts can be wholly made of wood, or wood with a cast iron poll end (upon where the sails are mounted) or entirely of cast iron.
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