When I worked for the county equipment shop, we had a full machine shop, and did a lot of that work in house. We had a large vertical mill and lathe, among other stuff. I ran the tool crib as well as my other duties as a parts guy. Of course, most of the work was mechanical truck, car, and machinery repair, on and off road. Lots of welding, fabricating, building up worn buckets, grousers, dump beds, garbage truck hoppers, etc. with hard facing rod as well. We rebuilt diesel engines, too. Of course, that was 30-40 years ago.