This is a big variable. Some of the first machines made here are still operating after 30 years. While the machines can last a long time, they can also be damaged from lack of maintenance and poor operating conditions. Since the machines operate next to water, the humidity is often 100% where they are. This can cause corrosion in both the wiring in the junction box or in the bearings. It would be good preventive maintenance to check both of these at least once a year.