If your router is a fixed base model, saw dust can get down in between the adjustment ring and the motor causing a lot of problems. I had to spray a teflon lube on mine and had to clean it out quit frequently. That's why I think most people use a plunge base on a table setup. I bought a craftsman combo fixed base and plunge base and mounted it to a homemade table but had the same problem with the fixed base. Sears has redesigned their routers to work more like the porter cable wish I had waited.