Machining a pump - GIF

[Toolmaker51]

Machining a pump.
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Boring a centrifugal pump on a lathe; inventive rig at least.
Appears centerline of casting too high for line-boring, which could have lessened many complications. Again, they aren't symmetrical, that would be not insurmountable challenge. No one has these sitting around. Driver they made 2-3 days build time, could sit years before next use, probably require a different pump housing fixture....
Well equipped shops use either horizontal or vertical boring mills, they're built for work like this; so, no special set-up required.

Frank S is correct, examined it first hand, it is very factory or done in job shop with all necessary facilities - even casting iron. Also correct about oddly geared lead screws; common thread specifications are not the full range of use.
Many proprietary combinations have been devised; some to confound repair or substitute parts, others to prevent unintended coupling; like fire equipment.
(i.e.) Cap for urn I made needed 7-1/2 TPI A proper Urn

At same shop here in CA, completed an emergency job for Honda Center, cooling plant shut down for broken water main. I parted off an 18" Sch-80 PVC flange fitting on a riser-equipped L&S 16/20 that swings 33" or so. It took every bit of cross slide, compound rotated 90° to left, two piece jaws assembled at outer notch, bit extended minimal amount for wall thickness, and minor details. PVC is thermoplastic, so helper poured straight water to keep chips flowing out; didn't want coolant film that might contaminate the glue joint.
Regarding raised machines; probably largest part I've faced with that situation. A raised machine still works, but aggravates leverage on width between the ways vs the carriage and cross slide, a taller, more acute angle than before, therefore losing some stability.