Thanks, Lathe Fan. Another great photo !
It looks like there is a third engine lathe to the extreme left of the photo, with just a hint of the front bedway and leadscrew or feed rod tail bearing showing. A box-column drill press is also visible.
The lance laid at the rear of the chip pan on the lathe in the approximate center of the photo probably has nothing to do with the machine tools, and is probably a job of some sort for use around the ship. The pointed tip looks to have possible wrench flats, and may have a hole drilled into each flat. My own guess is the lance is some sort of cleaning tool. Around a steam powered battleship, burning the Navy Standard heavy fuel oil (Bunker C), there would be considerable deposits of soot and slag in the fireside of the boilers and in places like the economizers and superheaters. The boilers as well as the economizers and superheaters all had permanently mounted steam soot blowers. The lance could well have been something used with steam to clean odd areas where the soot blowers did not reach. It might also have been used for clearing some piping subject to fouling. On a ship the size of the North Carolina, the amount of equipment and machinery that was needed to propel the ship was staggering. The weaponry was a whole other subject and was at least as staggering as the ship's propulsion plant. Combined, there was enough machinery and equipment to keep maintenance and repair crews continually busy.
I know the North Carolina and her sisters got some of the first Fairbanks-Morse 38 D 8 1/8 diesels for "black start" or emergency generating sets. I was on a job where one of the F-M diesel gensets that came off either the "Washington" or the "North Carolina" had been bought for plant power. It was almost a prototype F-M opposed piston diesel, as there were some significant design differences compared to the same series engines made for WWII a short time later. Leave it to F-M and the US Navy. It was the only opposed piston F-M diesel engine I ever saw with chrome plated crankcase handhole covers, and a lot of "brightwork" on it. There was a manual for the F-M genset, and it was a US Navy manual and stated it was for the F-M gensets on the Washington, North Carolina, and (I believe) two other heavy cruisers of the same class. At the time, I was surprised to learn that four (4) of these generating sets, of about 1250 Kw apiece were needed on each ship for black start and emergency power. That says a lot about the size of the ship. The main propulsion and ship's service electric power relied on steam turbines.
It would be interesting to learn the full "manifest" of machine tools carried on the "North Carolina". There may have been smaller lathes in shops dealing with electric motor repairs, or with fine work on stuff like fire control and rangefinders.
I wonder if the lathes and other heavier machine tools in this photo were set into what became the machine shop while the ship was being built. After the machine tools were set in location, bulkheads and the deck above were built around them. One of those situations where the machine tools were aboard the ship, with no chance of removal until the ship was scrapped.
The Navy is (or was) a service bound by traditions and rigid thinking. When the USS Cole was hit by terrorists in Yemen, one of the explosions hit the machine shop area. Damage was quite severe. The Cole was salvaged and taken to a shipyard for repair aboard what amounted to a seagoing tilt bed ("the Blue Marlin"). When the extent of the damage was determined, the Navy put an order in for replacements for the damaged machine tools in the Cole's machine shop. One of the machine tools requiring replacement was a Lodge and Shipley engine lathe. By the time this happened, L & S, along with Monarch and Sidney, were all absorbed by Lucas Precision. Lucas Precision has a stock of the remaining raw castings that each machine tool builder had on hand when they were bought by Lucas Precision. Lucas Precision has parts and drawings for all of the machine tools from the manufacturers they absorbed. Lucas Precision supplied the US Navy with a new L & S engine lathe. It was probably one very expensive lathe, and may well be the last manual heavy duty engine lathe built in the USA. With the gaping hole in the side of the Cole and the Cole drydocked for repairs, chances are the new L & S lathe went into the Cole's shop thru that hole.
I know the US Navy liked Reed and Prentice geared head engine lathes and a number of them wound up on ships. The US War Production Board seem to have arrived at an almost generic engine lathe design at the onset of WWII. Whether the lathes were made by L &S, R & P, or Sidney, they were close in overall size and appearance. The lathes in this photo have that classic look of the "generic" WWII era engine lathes.