Ship propeller shaft work using chain blocks.
Fullsize image: https://diqn32j8nouaz.cloudfront.net...t_fullsize.jpg
https://diqn32j8nouaz.cloudfront.net...ller_shaft.jpg
Previously:
https://www.homemadetools.net/forum/...676#post123646
https://www.homemadetools.net/forum/...2518#post96512
https://www.homemadetools.net/forum/...790#post133254

