Hello
It depends on how much you shave with it and how dense the hairs are. The machine is a professional machine. I shave my beard with it once or twice a week and oil the shaving head every three months. It hasn't broken down yet and I've had the machine for a very long time. I even gave it to my brother as a present. And what's great about the machine is that you can get spare parts. The shaving head can also be replaced if it is blunt, but it lasts a very, very, very long time in private use. So don't worry about oiling the shaving head.

I oil the machine 1 time per week of course also clean the hair in it