I did something similar in the early 90s, placing parts into various machines (produced 15000 welding tips in one summer).
At that factory drinking previously had been common among workers. They banned alcohol during weekdays after one worker fell into a spinning milling machine. But even after that those workers who came in on Saturdays were allowed to consume a limited quantity of beer.
When I was there it also was the time when they started to crack down on the alcohol use during working hours, but beer was still allowed and sold during the break.
Many didn't cope well with this and in the building I was working they had thrown out the contents of the first aid boxes to hide the beer bottles there.
At that factory drinking previously had been common among workers. They banned alcohol during weekdays after one worker fell into a spinning milling machine. But even after that those workers who came in on Saturdays were allowed to consume a limited quantity of beer.