There are one or more 'thrust bearings' which can be ball/roller type or plain ('oil') bearings. They might be separate bearings or one bearing may have both functions. Many automotive engines have a thrust face on one of the crank bearings since there is some thrust load due to clutch actuation forces (if a manual transmission). Obviously the loads are much higher on an aircraft engine, however.
Do an internet search on 'thrust bearing' and you'll probably find a lot of info
