No gears. It's armature and field coilds are wired to produce that speed. You can get speed controllers that will allow you to slow it down for other applications. Anytime you start spinning bits more than 1 1/2" in diameter you need to slow the speed down and lots of routers back in that period did not come with an integral controller built in. The separate controllers cam only be used with universal type motors and can not be used with a tool that already has one built in.