Boring a ship's large driveshaft - photo

[Jon]

Boring a ship's large driveshaft. Labeled as 1920s-1930s.

Fullsize image: https://diqn32j8nouaz.cloudfront.net...t_fullsize.jpg




Previously:

1943 giant Betts horizontal boring machine - photos
Casting a giant propellor GIF

[Toolmaker51]

A couple sizes larger than Frank S's "pencil sharpener". But still far from largest of lathes. Those, you park a chair on the toolpost...not just leaning. That mans a slacker!
I ran a 48" Monarch periodically, for large round compression molds, like O-rings, but shaped like garage door seals, weather seals for some kind of hatch. Not as much fun, stood on the regular ol' floor.

[Ralphxyz]

Definitely not QCTP (Quick Change Tool Post)!

[Toolmaker51]

Definitely not QCTP (Quick Change Tool Post)!

Which one? Note carriage closer to headstock, larger yet, appears same size toolholder. Not QCTP. That bit looks 4" square and 30"+ long. At those dimensions, it weighs ~135 pounds. Not incredibly heavy, but without a good place to stand...
And a freebie, courtesy EMJ [IMNSHO pick as best material supplier] https://www.emjmetals.com/pdf_indexe...ght_Tables.pdf

Large lathes, 20" swing and up, depending on the shops work, are best served by bridge or gantry crane. Loading with a forklift and slung material is a small nightmare in coordination. A smaller manual chain fall from main hook [or the rail, even better] is my favored type of manipulator. Powered types don't inch well.