Depends on what speed the router runs at and how many hours you run it. It’s a router, not a spindle…it’s intended to run when operated by hand - 100 hours of by hand operation of a router is a LOT of routing. 100 hours of using it is a spindle is not nearly as many projects. From what I understand, ~100 hours on the lowest speed is about what you can expect. The alternative is to use one of the many spindles available instead.