Gigantic ACME bolt. By Vanover Machine & Repair. 55:24 video:
https://www.youtube.com/watch?v=e7PkVWitlZw
Printable View
Gigantic ACME bolt. By Vanover Machine & Repair. 55:24 video:
https://www.youtube.com/watch?v=e7PkVWitlZw
Gigantic?
Hardly
Attachment 50289
Cutting the feed screw used in a machine, which rifled 240 mm
howitzer barrels, at the Niles Tool Works during WWII.
The screw is 6 inches in diameter and 62 feet long.
Quadruple threads 1-1/8 inch pitch, 4 1/2 inch lead,
being cut to an accuracy of .002 of an inch per foot of length.
Screw weighs 5,000 pounds.
Now that is big...