Most of the 1/16" radius router bits have a 1/2" bearing. If you are breaking the edge of parts that have inside radius less than 1/4" your back to sanding by hand. In my case the parts that need to have the sharp edge broken on small radius inside corners, I have a buffer set up with stacked 320 grit 3" x 9" finger sanding strips. Gets into the small inside corners with ease as well as outside. If it is long straight edge that need a broken edge it's back to a trim router with the 1/16" radius router bit and a light touch with 400 paper to remove the fine chatter left by the router.