It's a non issue, after chambered, threaded, new crown, etc. will machined, threaded, or turned ...what's spun on? I was a professional machinist for 35 yrs. "Spun on" or "spun up" is not a term used in professional machining...not taught in any trade school, apprenticeship, college machine tool technology, or on the job...ever. Not even a first week apprentice would use that term...and only once.
Slang, and/ or inspiring to being cool, don't cut it...and deletes your intelligence. Precision machining requires precise terminologies, for discussing exacting proceedures, for processing metals to their final form. Professionals stay professional, and help educate...so it's difficult to digest slang, that doesn't apply... but free speech applies, so you get to use any words you choose ...with my blessing...but I'd correct you in the machine shop... "Excellence in Manufacturing" was the logo on the front of the building, competing worldwide for computor, robotics, & government contracts...after 24 yrs in the areospace & nuclear reactor parts refueling business, and 15 of those yrs in Nuclear weapons reactor refueling to make bomb grade material.
A very precise, serious, stern, and extremely regulated business, with a 10 yr prison sentence for falsifying any document or trying to pass on a part knowing it to be out of print...Your signature is on everything that passes through your hands and everything you are required to check must be signed off on...and one guy went to prison for 10 yrs. to let everyone else know, the DOD is serious...but through all the seriousness ya gotta keep your sense of humor...but also have a serious ingrained precise side that's hard to shake even when I'm retired...but being a machinist is the best job, ever...when you're retired with machine tools to play with, and ideas to try.
