The company bought Dormer brand bits 20 gross at a time. and the little high speed 1/4"pneumatic drill motors had a life expectancy of about 3 to 6 weeks or about 300 to 500 hours I think that was mainly because no one thought about keeping the regulator filters or oil misters maintained. they had close to 100 workers on the floor in all departments I was a floater I might be welding up the draw works spools ( think of huge winch drums with 42" diameter brake drums on each end)one week, or building a hydraulic manipulating arm the next or helping an electrician build a control console with 30 different gauges in it sometimes I would lend a hand in the skinning department all of those drills running at the same time sounded like a billion mosquitoes buzzing around a microphone connected to Pete Townshend's guitar AMP.
It was not uncommon to have 100 hours or more on our time tickets by the end of the week. THe pay was good the hours were long sometimes way too long but the work environment degraded ti unbearable after about 8 months.