Makita Router Brushes

It’s always a good idea to keep extra brushes for the router on hand. These are consumable items that will eventually wear out. (and really sucks when its the middle of your project!)


I know this was posted quite a while ago, @MyersWoodshop, but wondering if you could answer a dumb question for me: how do you know when to replace the brushes? Will the router start making some sort of terrible sound? Or maybe you can inspect them and tell if they are worn out? Thanks in advance!

The router will either stop spinning, or start sparking, or audibly be ‘different’ than when it runs normally. every 100 hours or so of use I’d be ready to change them out.